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-rw-r--r--build/m4/ax_c__generic.m428
-rw-r--r--build/m4/ax_c_lto.m421
-rw-r--r--build/m4/ax_c_mallinfo.m424
-rw-r--r--build/m4/ax_c_mallopt.m420
-rw-r--r--build/m4/ax_c_statement_expressions.m423
-rw-r--r--build/m4/ax_check_compile_flag.m450
-rw-r--r--build/m4/ax_check_enable_debug.m4122
-rw-r--r--build/m4/ax_compiler_vendor.m4119
-rw-r--r--build/m4/ax_cxx_compile_stdcxx.m41018
-rw-r--r--build/m4/ax_gcc_func_attribute.m4223
-rw-r--r--build/m4/ax_pthread.m4522
-rw-r--r--build/m4/jemalloc.m475
-rw-r--r--build/m4/tcmalloc.m445
13 files changed, 2290 insertions, 0 deletions
diff --git a/build/m4/ax_c__generic.m4 b/build/m4/ax_c__generic.m4
new file mode 100644
index 00000000..0c4dd52c
--- /dev/null
+++ b/build/m4/ax_c__generic.m4
@@ -0,0 +1,28 @@
+# https://lists.gnu.org/archive/html/autoconf-commit/2012-12/msg00004.html
+# AC_C__GENERIC
+# -------------
+# Define HAVE_C__GENERIC if _Generic works, a la C11.
+AN_IDENTIFIER([_Generic], [AC_C__GENERIC])
+AC_DEFUN([AC_C__GENERIC],
+[AC_CACHE_CHECK([for _Generic], ac_cv_c__Generic,
+[AC_COMPILE_IFELSE(
+ [AC_LANG_SOURCE(
+ [[int
+ main (int argc, char **argv)
+ {
+ int a = _Generic (argc, int: argc = 1);
+ int *b = &_Generic (argc, default: argc);
+ char ***c = _Generic (argv, int: argc, default: argv ? &argv : 0);
+ _Generic (1 ? 0 : b, int: a, default: b) = &argc;
+ _Generic (a = 1, default: a) = 3;
+ return a + !b + !c;
+ }
+ ]])],
+ [ac_cv_c__Generic=yes],
+ [ac_cv_c__Generic=no])])
+if test $ac_cv_c__Generic = yes; then
+ AC_DEFINE([HAVE_C__GENERIC], 1,
+ [Define to 1 if C11-style _Generic works.])
+fi
+])# AC_C__GENERIC
+
diff --git a/build/m4/ax_c_lto.m4 b/build/m4/ax_c_lto.m4
new file mode 100644
index 00000000..7e6bc011
--- /dev/null
+++ b/build/m4/ax_c_lto.m4
@@ -0,0 +1,21 @@
+# AC_C_LTO
+# -------------
+# Define HAVE_LTO if -flto works.
+AN_IDENTIFIER([lto], [AC_C_LTO])
+AC_DEFUN([AC_C_LTO],
+[AC_CACHE_CHECK([if -flto builds executables], ac_cv_c_lto,
+[AC_RUN_IFELSE(
+ [AC_LANG_SOURCE(
+ [[#include <stdio.h>
+ int main(int argc, char **argv) {
+ return 0;
+ }
+ ]])],
+ [ac_cv_c_lto=yes],
+ [ac_cv_c_lto=no],
+ [ac_cv_c_lto=${ac_cv_c_lto_cross_compile}])])
+if test "${ac_cv_c_lto}" = "yes"; then
+ AC_DEFINE([HAVE_LTO], 1,
+ [Define to 1 if -flto works.])
+fi
+])# AC_C_LTO
diff --git a/build/m4/ax_c_mallinfo.m4 b/build/m4/ax_c_mallinfo.m4
new file mode 100644
index 00000000..af8d0481
--- /dev/null
+++ b/build/m4/ax_c_mallinfo.m4
@@ -0,0 +1,24 @@
+# AC_C_MALLINFO
+# -------------
+# Define HAVE_C_MALLINFO if mallinfo() works.
+AN_IDENTIFIER([mallinfo], [AC_C_MALLINFO])
+AC_DEFUN([AC_C_MALLINFO],
+[AC_CACHE_CHECK([for mallinfo], ac_cv_c_mallinfo,
+[AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <malloc.h>]],
+ [[
+ struct mallinfo mi = mallinfo();
+ /* make sure that fields exists */
+ mi.uordblks = 0;
+ mi.hblkhd = 0;
+ mi.arena = 0;
+ ]]
+ )],
+ [ac_cv_c_mallinfo=yes],
+ [ac_cv_c_mallinfo=no])])
+if test $ac_cv_c_mallinfo = yes; then
+ AC_DEFINE([HAVE_C_MALLINFO], 1,
+ [Define to 1 if glibc mallinfo exists.])
+fi
+])# AC_C_MALLINFO
diff --git a/build/m4/ax_c_mallopt.m4 b/build/m4/ax_c_mallopt.m4
new file mode 100644
index 00000000..31c4fdc3
--- /dev/null
+++ b/build/m4/ax_c_mallopt.m4
@@ -0,0 +1,20 @@
+# AC_C_MALLOPT
+# -------------
+# Define HAVE_C_MALLOPT if mallopt() works.
+AN_IDENTIFIER([mallopt], [AC_C_MALLOPT])
+AC_DEFUN([AC_C_MALLOPT],
+[AC_CACHE_CHECK([for mallopt], ac_cv_c_mallopt,
+[AC_LINK_IFELSE(
+ [AC_LANG_SOURCE(
+ [[#include <malloc.h>
+ int main(int argc, char **argv) {
+ mallopt(M_ARENA_MAX, 1);
+ }
+ ]])],
+ [ac_cv_c_mallopt=yes],
+ [ac_cv_c_mallopt=no])])
+if test $ac_cv_c_mallopt = yes; then
+ AC_DEFINE([HAVE_C_MALLOPT], 1,
+ [Define to 1 if glibc mallopt exists.])
+fi
+])# AC_C_MALLOPT
diff --git a/build/m4/ax_c_statement_expressions.m4 b/build/m4/ax_c_statement_expressions.m4
new file mode 100644
index 00000000..fb259e72
--- /dev/null
+++ b/build/m4/ax_c_statement_expressions.m4
@@ -0,0 +1,23 @@
+# AC_C_STMT_EXPR
+# -------------
+# Define HAVE_STMT_EXPR if compiler has statement expressions.
+AN_IDENTIFIER([_Generic], [AC_C_STMT_EXPR])
+AC_DEFUN([AC_C_STMT_EXPR],
+[AC_CACHE_CHECK([for statement expressions], ac_cv_c_stmt_expr,
+[AC_COMPILE_IFELSE(
+ [AC_LANG_SOURCE(
+ [[int
+ main (int argc, char **argv)
+ {
+ int x = ({ int y = 1; y; });
+ return x;
+ }
+ ]])],
+ [ac_cv_c_stmt_expr=yes],
+ [ac_cv_c_stmt_expr=no])])
+if test $ac_cv_c_stmt_expr = yes; then
+ AC_DEFINE([HAVE_STMT_EXPR], 1,
+ [Define to 1 if compiler supports statement expressions.])
+fi
+])# AC_C_STMT_EXPR
+
diff --git a/build/m4/ax_check_compile_flag.m4 b/build/m4/ax_check_compile_flag.m4
new file mode 100644
index 00000000..c515602f
--- /dev/null
+++ b/build/m4/ax_check_compile_flag.m4
@@ -0,0 +1,50 @@
+# ===========================================================================
+# http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+# Check whether the given FLAG works with the current language's compiler
+# or gives an error. (Warnings, however, are ignored)
+#
+# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+# success/failure.
+#
+# If EXTRA-FLAGS is defined, it is added to the current language's default
+# flags (e.g. CFLAGS) when the check is done. The check is thus made with
+# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
+# force the compiler to issue an error when a bad flag is given.
+#
+# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
+# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+# SPDX-License-Identifier: GPL-3.0
+
+#serial 3
+
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+ ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+ _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+ AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+ [AS_VAR_SET(CACHEVAR,[yes])],
+ [AS_VAR_SET(CACHEVAR,[no])])
+ _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
+ [m4_default([$2], :)],
+ [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS
diff --git a/build/m4/ax_check_enable_debug.m4 b/build/m4/ax_check_enable_debug.m4
new file mode 100644
index 00000000..db5bab2f
--- /dev/null
+++ b/build/m4/ax_check_enable_debug.m4
@@ -0,0 +1,122 @@
+# ===========================================================================
+# http://www.gnu.org/software/autoconf-archive/ax_check_enable_debug.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CHECK_ENABLE_DEBUG([enable by default=yes/info/profile/no], [ENABLE DEBUG VARIABLES ...], [DISABLE DEBUG VARIABLES NDEBUG ...], [IS-RELEASE])
+#
+# DESCRIPTION
+#
+# Check for the presence of an --enable-debug option to configure, with
+# the specified default value used when the option is not present. Return
+# the value in the variable $ax_enable_debug.
+#
+# Specifying 'yes' adds '-g -O0' to the compilation flags for all
+# languages. Specifying 'info' adds '-g' to the compilation flags.
+# Specifying 'profile' adds '-g -pg' to the compilation flags and '-pg' to
+# the linking flags. Otherwise, nothing is added.
+#
+# Define the variables listed in the second argument if debug is enabled,
+# defaulting to no variables. Defines the variables listed in the third
+# argument if debug is disabled, defaulting to NDEBUG. All lists of
+# variables should be space-separated.
+#
+# If debug is not enabled, ensure AC_PROG_* will not add debugging flags.
+# Should be invoked prior to any AC_PROG_* compiler checks.
+#
+# IS-RELEASE can be used to change the default to 'no' when making a
+# release. Set IS-RELEASE to 'yes' or 'no' as appropriate. By default, it
+# uses the value of $ax_is_release, so if you are using the AX_IS_RELEASE
+# macro, there is no need to pass this parameter.
+#
+# AX_IS_RELEASE([git-directory])
+# AX_CHECK_ENABLE_DEBUG()
+#
+# LICENSE
+#
+# Copyright (c) 2011 Rhys Ulerich <rhys.ulerich@gmail.com>
+# Copyright (c) 2014, 2015 Philip Withnall <philip@tecnocode.co.uk>
+#
+# SPDX-License-Identifier: FSFAP
+
+#serial 5
+
+AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
+ AC_BEFORE([$0],[AC_PROG_CC])dnl
+ AC_BEFORE([$0],[AC_PROG_CXX])dnl
+ AC_BEFORE([$0],[AC_PROG_F77])dnl
+ AC_BEFORE([$0],[AC_PROG_FC])dnl
+
+ AC_MSG_CHECKING(whether to enable debugging)
+
+ ax_enable_debug_default=m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))
+ ax_enable_debug_is_release=m4_tolower(m4_normalize(ifelse([$4],,
+ [$ax_is_release],
+ [$4])))
+
+ # If this is a release, override the default.
+ AS_IF([test "$ax_enable_debug_is_release" = "yes"],
+ [ax_enable_debug_default="no"])
+
+ m4_define(ax_enable_debug_vars,[m4_normalize(ifelse([$2],,,[$2]))])
+ m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
+
+ AC_ARG_ENABLE(debug,
+ [AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
+ [],enable_debug=$ax_enable_debug_default)
+
+ # empty mean debug yes
+ AS_IF([test "x$enable_debug" = "x"],
+ [enable_debug="yes"])
+
+ # case of debug
+ AS_CASE([$enable_debug],
+ [yes],[
+ AC_MSG_RESULT(yes)
+ CFLAGS="${CFLAGS} -g -O0"
+ CXXFLAGS="${CXXFLAGS} -g -O0"
+ FFLAGS="${FFLAGS} -g -O0"
+ FCFLAGS="${FCFLAGS} -g -O0"
+ OBJCFLAGS="${OBJCFLAGS} -g -O0"
+ ],
+ [info],[
+ AC_MSG_RESULT(info)
+ CFLAGS="${CFLAGS} -g"
+ CXXFLAGS="${CXXFLAGS} -g"
+ FFLAGS="${FFLAGS} -g"
+ FCFLAGS="${FCFLAGS} -g"
+ OBJCFLAGS="${OBJCFLAGS} -g"
+ ],
+ [profile],[
+ AC_MSG_RESULT(profile)
+ CFLAGS="${CFLAGS} -g -pg"
+ CXXFLAGS="${CXXFLAGS} -g -pg"
+ FFLAGS="${FFLAGS} -g -pg"
+ FCFLAGS="${FCFLAGS} -g -pg"
+ OBJCFLAGS="${OBJCFLAGS} -g -pg"
+ LDFLAGS="${LDFLAGS} -pg"
+ ],
+ [
+ AC_MSG_RESULT(no)
+ dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
+ dnl by setting any unset environment flag variables
+ AS_IF([test "x${CFLAGS+set}" != "xset"],
+ [CFLAGS=""])
+ AS_IF([test "x${CXXFLAGS+set}" != "xset"],
+ [CXXFLAGS=""])
+ AS_IF([test "x${FFLAGS+set}" != "xset"],
+ [FFLAGS=""])
+ AS_IF([test "x${FCFLAGS+set}" != "xset"],
+ [FCFLAGS=""])
+ AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
+ [OBJCFLAGS=""])
+ ])
+
+ dnl Define various variables if debugging is disabled.
+ dnl assert.h is a NOP if NDEBUG is defined, so define it by default.
+ AS_IF([test "x$enable_debug" = "xyes"],
+ [m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])])],
+ [m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])])])
+ ax_enable_debug=$enable_debug
+])
diff --git a/build/m4/ax_compiler_vendor.m4 b/build/m4/ax_compiler_vendor.m4
new file mode 100644
index 00000000..039f99d2
--- /dev/null
+++ b/build/m4/ax_compiler_vendor.m4
@@ -0,0 +1,119 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_compiler_vendor.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_COMPILER_VENDOR
+#
+# DESCRIPTION
+#
+# Determine the vendor of the C, C++ or Fortran compiler. The vendor is
+# returned in the cache variable $ax_cv_c_compiler_vendor for C,
+# $ax_cv_cxx_compiler_vendor for C++ or $ax_cv_fc_compiler_vendor for
+# (modern) Fortran. The value is one of "intel", "ibm", "pathscale",
+# "clang" (LLVM), "cray", "fujitsu", "sdcc", "sx", "nvhpc" (NVIDIA HPC
+# Compiler), "portland" (PGI), "gnu" (GCC), "sun" (Oracle Developer
+# Studio), "hp", "dec", "borland", "comeau", "kai", "lcc", "sgi",
+# "microsoft", "metrowerks", "watcom", "tcc" (Tiny CC) or "unknown" (if
+# the compiler cannot be determined).
+#
+# To check for a Fortran compiler, you must first call AC_FC_PP_SRCEXT
+# with an appropriate preprocessor-enabled extension. For example:
+#
+# AC_LANG_PUSH([Fortran])
+# AC_PROG_FC
+# AC_FC_PP_SRCEXT([F])
+# AX_COMPILER_VENDOR
+# AC_LANG_POP([Fortran])
+#
+# LICENSE
+#
+# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+# Copyright (c) 2008 Matteo Frigo
+# Copyright (c) 2018-19 John Zaitseff <J.Zaitseff@zap.org.au>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 32
+
+AC_DEFUN([AX_COMPILER_VENDOR], [dnl
+ AC_CACHE_CHECK([for _AC_LANG compiler vendor], ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor, [dnl
+ dnl If you modify this list of vendors, please add similar support
+ dnl to ax_compiler_version.m4 if at all possible.
+ dnl
+ dnl Note: Do NOT check for GCC first since some other compilers
+ dnl define __GNUC__ to remain compatible with it. Compilers that
+ dnl are very slow to start (such as Intel) are listed first.
+
+ vendors="
+ intel: __ICC,__ECC,__INTEL_COMPILER
+ ibm: __xlc__,__xlC__,__IBMC__,__IBMCPP__,__ibmxl__
+ pathscale: __PATHCC__,__PATHSCALE__
+ clang: __clang__
+ cray: _CRAYC
+ fujitsu: __FUJITSU
+ sdcc: SDCC,__SDCC
+ sx: _SX
+ nvhpc: __NVCOMPILER
+ portland: __PGI
+ gnu: __GNUC__
+ sun: __SUNPRO_C,__SUNPRO_CC,__SUNPRO_F90,__SUNPRO_F95
+ hp: __HP_cc,__HP_aCC
+ dec: __DECC,__DECCXX,__DECC_VER,__DECCXX_VER
+ borland: __BORLANDC__,__CODEGEARC__,__TURBOC__
+ comeau: __COMO__
+ kai: __KCC
+ lcc: __LCC__
+ sgi: __sgi,sgi
+ microsoft: _MSC_VER
+ metrowerks: __MWERKS__
+ watcom: __WATCOMC__
+ tcc: __TINYC__
+ unknown: UNKNOWN
+ "
+ for ventest in $vendors; do
+ case $ventest in
+ *:)
+ vendor=$ventest
+ continue
+ ;;
+ *)
+ vencpp="defined("`echo $ventest | sed 's/,/) || defined(/g'`")"
+ ;;
+ esac
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
+#if !($vencpp)
+ thisisanerror;
+#endif
+ ]])], [break])
+ done
+
+ ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor=`echo $vendor | cut -d: -f1`
+ ])
+])dnl
diff --git a/build/m4/ax_cxx_compile_stdcxx.m4 b/build/m4/ax_cxx_compile_stdcxx.m4
new file mode 100644
index 00000000..8edf5152
--- /dev/null
+++ b/build/m4/ax_cxx_compile_stdcxx.m4
@@ -0,0 +1,1018 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional])
+#
+# DESCRIPTION
+#
+# Check for baseline language coverage in the compiler for the specified
+# version of the C++ standard. If necessary, add switches to CXX and
+# CXXCPP to enable support. VERSION may be '11', '14', '17', or '20' for
+# the respective C++ standard version.
+#
+# The second argument, if specified, indicates whether you insist on an
+# extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
+# -std=c++11). If neither is specified, you get whatever works, with
+# preference for no added switch, and then for an extended mode.
+#
+# The third argument, if specified 'mandatory' or if left unspecified,
+# indicates that baseline support for the specified C++ standard is
+# required and that the macro should error out if no mode with that
+# support is found. If specified 'optional', then configuration proceeds
+# regardless, after defining HAVE_CXX${VERSION} if and only if a
+# supporting mode is found.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
+# Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
+# Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
+# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
+# Copyright (c) 2015 Paul Norman <penorman@mac.com>
+# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
+# Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
+# Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com>
+# Copyright (c) 2020 Jason Merrill <jason@redhat.com>
+# Copyright (c) 2021 Jörn Heusipp <osmanx@problemloesungsmaschine.de>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 18
+
+dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
+dnl (serial version number 13).
+
+AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
+ m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
+ [$1], [14], [ax_cxx_compile_alternatives="14 1y"],
+ [$1], [17], [ax_cxx_compile_alternatives="17 1z"],
+ [$1], [20], [ax_cxx_compile_alternatives="20"],
+ [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
+ m4_if([$2], [], [],
+ [$2], [ext], [],
+ [$2], [noext], [],
+ [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
+ m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
+ [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
+ [$3], [optional], [ax_cxx_compile_cxx$1_required=false],
+ [m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
+ AC_LANG_PUSH([C++])dnl
+ ac_success=no
+
+ m4_if([$2], [], [dnl
+ AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
+ ax_cv_cxx_compile_cxx$1,
+ [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
+ [ax_cv_cxx_compile_cxx$1=yes],
+ [ax_cv_cxx_compile_cxx$1=no])])
+ if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
+ ac_success=yes
+ fi])
+
+ m4_if([$2], [noext], [], [dnl
+ if test x$ac_success = xno; then
+ for alternative in ${ax_cxx_compile_alternatives}; do
+ switch="-std=gnu++${alternative}"
+ cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
+ AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
+ $cachevar,
+ [ac_save_CXX="$CXX"
+ CXX="$CXX $switch"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
+ [eval $cachevar=yes],
+ [eval $cachevar=no])
+ CXX="$ac_save_CXX"])
+ if eval test x\$$cachevar = xyes; then
+ CXX="$CXX $switch"
+ if test -n "$CXXCPP" ; then
+ CXXCPP="$CXXCPP $switch"
+ fi
+ ac_success=yes
+ break
+ fi
+ done
+ fi])
+
+ m4_if([$2], [ext], [], [dnl
+ if test x$ac_success = xno; then
+ dnl HP's aCC needs +std=c++11 according to:
+ dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
+ dnl Cray's crayCC needs "-h std=c++11"
+ dnl MSVC needs -std:c++NN for C++17 and later (default is C++14)
+ for alternative in ${ax_cxx_compile_alternatives}; do
+ for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}" MSVC; do
+ if test x"$switch" = xMSVC; then
+ dnl AS_TR_SH maps both `:` and `=` to `_` so -std:c++17 would collide
+ dnl with -std=c++17. We suffix the cache variable name with _MSVC to
+ dnl avoid this.
+ switch=-std:c++${alternative}
+ cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_${switch}_MSVC])
+ else
+ cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
+ fi
+ AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
+ $cachevar,
+ [ac_save_CXX="$CXX"
+ CXX="$CXX $switch"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
+ [eval $cachevar=yes],
+ [eval $cachevar=no])
+ CXX="$ac_save_CXX"])
+ if eval test x\$$cachevar = xyes; then
+ CXX="$CXX $switch"
+ if test -n "$CXXCPP" ; then
+ CXXCPP="$CXXCPP $switch"
+ fi
+ ac_success=yes
+ break
+ fi
+ done
+ if test x$ac_success = xyes; then
+ break
+ fi
+ done
+ fi])
+ AC_LANG_POP([C++])
+ if test x$ax_cxx_compile_cxx$1_required = xtrue; then
+ if test x$ac_success = xno; then
+ AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
+ fi
+ fi
+ if test x$ac_success = xno; then
+ HAVE_CXX$1=0
+ AC_MSG_NOTICE([No compiler with C++$1 support was found])
+ else
+ HAVE_CXX$1=1
+ AC_DEFINE(HAVE_CXX$1,1,
+ [define if the compiler supports basic C++$1 syntax])
+ fi
+ AC_SUBST(HAVE_CXX$1)
+])
+
+
+dnl Test body for checking C++11 support
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11],
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+)
+
+dnl Test body for checking C++14 support
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
+)
+
+dnl Test body for checking C++17 support
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17],
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
+)
+
+dnl Test body for checking C++20 support
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_20],
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
+ _AX_CXX_COMPILE_STDCXX_testbody_new_in_20
+)
+
+
+dnl Tests for new features in C++11
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[
+
+// If the compiler admits that it is not ready for C++11, why torture it?
+// Hopefully, this will speed up the test.
+
+#ifndef __cplusplus
+
+#error "This is not a C++ compiler"
+
+// MSVC always sets __cplusplus to 199711L in older versions; newer versions
+// only set it correctly if /Zc:__cplusplus is specified as well as a
+// /std:c++NN switch:
+// https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
+#elif __cplusplus < 201103L && !defined _MSC_VER
+
+#error "This is not a C++11 compiler"
+
+#else
+
+namespace cxx11
+{
+
+ namespace test_static_assert
+ {
+
+ template <typename T>
+ struct check
+ {
+ static_assert(sizeof(int) <= sizeof(T), "not big enough");
+ };
+
+ }
+
+ namespace test_final_override
+ {
+
+ struct Base
+ {
+ virtual ~Base() {}
+ virtual void f() {}
+ };
+
+ struct Derived : public Base
+ {
+ virtual ~Derived() override {}
+ virtual void f() override {}
+ };
+
+ }
+
+ namespace test_double_right_angle_brackets
+ {
+
+ template < typename T >
+ struct check {};
+
+ typedef check<void> single_type;
+ typedef check<check<void>> double_type;
+ typedef check<check<check<void>>> triple_type;
+ typedef check<check<check<check<void>>>> quadruple_type;
+
+ }
+
+ namespace test_decltype
+ {
+
+ int
+ f()
+ {
+ int a = 1;
+ decltype(a) b = 2;
+ return a + b;
+ }
+
+ }
+
+ namespace test_type_deduction
+ {
+
+ template < typename T1, typename T2 >
+ struct is_same
+ {
+ static const bool value = false;
+ };
+
+ template < typename T >
+ struct is_same<T, T>
+ {
+ static const bool value = true;
+ };
+
+ template < typename T1, typename T2 >
+ auto
+ add(T1 a1, T2 a2) -> decltype(a1 + a2)
+ {
+ return a1 + a2;
+ }
+
+ int
+ test(const int c, volatile int v)
+ {
+ static_assert(is_same<int, decltype(0)>::value == true, "");
+ static_assert(is_same<int, decltype(c)>::value == false, "");
+ static_assert(is_same<int, decltype(v)>::value == false, "");
+ auto ac = c;
+ auto av = v;
+ auto sumi = ac + av + 'x';
+ auto sumf = ac + av + 1.0;
+ static_assert(is_same<int, decltype(ac)>::value == true, "");
+ static_assert(is_same<int, decltype(av)>::value == true, "");
+ static_assert(is_same<int, decltype(sumi)>::value == true, "");
+ static_assert(is_same<int, decltype(sumf)>::value == false, "");
+ static_assert(is_same<int, decltype(add(c, v))>::value == true, "");
+ return (sumf > 0.0) ? sumi : add(c, v);
+ }
+
+ }
+
+ namespace test_noexcept
+ {
+
+ int f() { return 0; }
+ int g() noexcept { return 0; }
+
+ static_assert(noexcept(f()) == false, "");
+ static_assert(noexcept(g()) == true, "");
+
+ }
+
+ namespace test_constexpr
+ {
+
+ template < typename CharT >
+ unsigned long constexpr
+ strlen_c_r(const CharT *const s, const unsigned long acc) noexcept
+ {
+ return *s ? strlen_c_r(s + 1, acc + 1) : acc;
+ }
+
+ template < typename CharT >
+ unsigned long constexpr
+ strlen_c(const CharT *const s) noexcept
+ {
+ return strlen_c_r(s, 0UL);
+ }
+
+ static_assert(strlen_c("") == 0UL, "");
+ static_assert(strlen_c("1") == 1UL, "");
+ static_assert(strlen_c("example") == 7UL, "");
+ static_assert(strlen_c("another\0example") == 7UL, "");
+
+ }
+
+ namespace test_rvalue_references
+ {
+
+ template < int N >
+ struct answer
+ {
+ static constexpr int value = N;
+ };
+
+ answer<1> f(int&) { return answer<1>(); }
+ answer<2> f(const int&) { return answer<2>(); }
+ answer<3> f(int&&) { return answer<3>(); }
+
+ void
+ test()
+ {
+ int i = 0;
+ const int c = 0;
+ static_assert(decltype(f(i))::value == 1, "");
+ static_assert(decltype(f(c))::value == 2, "");
+ static_assert(decltype(f(0))::value == 3, "");
+ }
+
+ }
+
+ namespace test_uniform_initialization
+ {
+
+ struct test
+ {
+ static const int zero {};
+ static const int one {1};
+ };
+
+ static_assert(test::zero == 0, "");
+ static_assert(test::one == 1, "");
+
+ }
+
+ namespace test_lambdas
+ {
+
+ void
+ test1()
+ {
+ auto lambda1 = [](){};
+ auto lambda2 = lambda1;
+ lambda1();
+ lambda2();
+ }
+
+ int
+ test2()
+ {
+ auto a = [](int i, int j){ return i + j; }(1, 2);
+ auto b = []() -> int { return '0'; }();
+ auto c = [=](){ return a + b; }();
+ auto d = [&](){ return c; }();
+ auto e = [a, &b](int x) mutable {
+ const auto identity = [](int y){ return y; };
+ for (auto i = 0; i < a; ++i)
+ a += b--;
+ return x + identity(a + b);
+ }(0);
+ return a + b + c + d + e;
+ }
+
+ int
+ test3()
+ {
+ const auto nullary = [](){ return 0; };
+ const auto unary = [](int x){ return x; };
+ using nullary_t = decltype(nullary);
+ using unary_t = decltype(unary);
+ const auto higher1st = [](nullary_t f){ return f(); };
+ const auto higher2nd = [unary](nullary_t f1){
+ return [unary, f1](unary_t f2){ return f2(unary(f1())); };
+ };
+ return higher1st(nullary) + higher2nd(nullary)(unary);
+ }
+
+ }
+
+ namespace test_variadic_templates
+ {
+
+ template <int...>
+ struct sum;
+
+ template <int N0, int... N1toN>
+ struct sum<N0, N1toN...>
+ {
+ static constexpr auto value = N0 + sum<N1toN...>::value;
+ };
+
+ template <>
+ struct sum<>
+ {
+ static constexpr auto value = 0;
+ };
+
+ static_assert(sum<>::value == 0, "");
+ static_assert(sum<1>::value == 1, "");
+ static_assert(sum<23>::value == 23, "");
+ static_assert(sum<1, 2>::value == 3, "");
+ static_assert(sum<5, 5, 11>::value == 21, "");
+ static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, "");
+
+ }
+
+ // http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae
+ // Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function
+ // because of this.
+ namespace test_template_alias_sfinae
+ {
+
+ struct foo {};
+
+ template<typename T>
+ using member = typename T::member_type;
+
+ template<typename T>
+ void func(...) {}
+
+ template<typename T>
+ void func(member<T>*) {}
+
+ void test();
+
+ void test() { func<foo>(0); }
+
+ }
+
+} // namespace cxx11
+
+#endif // __cplusplus >= 201103L
+
+]])
+
+
+dnl Tests for new features in C++14
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[
+
+// If the compiler admits that it is not ready for C++14, why torture it?
+// Hopefully, this will speed up the test.
+
+#ifndef __cplusplus
+
+#error "This is not a C++ compiler"
+
+#elif __cplusplus < 201402L && !defined _MSC_VER
+
+#error "This is not a C++14 compiler"
+
+#else
+
+namespace cxx14
+{
+
+ namespace test_polymorphic_lambdas
+ {
+
+ int
+ test()
+ {
+ const auto lambda = [](auto&&... args){
+ const auto istiny = [](auto x){
+ return (sizeof(x) == 1UL) ? 1 : 0;
+ };
+ const int aretiny[] = { istiny(args)... };
+ return aretiny[0];
+ };
+ return lambda(1, 1L, 1.0f, '1');
+ }
+
+ }
+
+ namespace test_binary_literals
+ {
+
+ constexpr auto ivii = 0b0000000000101010;
+ static_assert(ivii == 42, "wrong value");
+
+ }
+
+ namespace test_generalized_constexpr
+ {
+
+ template < typename CharT >
+ constexpr unsigned long
+ strlen_c(const CharT *const s) noexcept
+ {
+ auto length = 0UL;
+ for (auto p = s; *p; ++p)
+ ++length;
+ return length;
+ }
+
+ static_assert(strlen_c("") == 0UL, "");
+ static_assert(strlen_c("x") == 1UL, "");
+ static_assert(strlen_c("test") == 4UL, "");
+ static_assert(strlen_c("another\0test") == 7UL, "");
+
+ }
+
+ namespace test_lambda_init_capture
+ {
+
+ int
+ test()
+ {
+ auto x = 0;
+ const auto lambda1 = [a = x](int b){ return a + b; };
+ const auto lambda2 = [a = lambda1(x)](){ return a; };
+ return lambda2();
+ }
+
+ }
+
+ namespace test_digit_separators
+ {
+
+ constexpr auto ten_million = 100'000'000;
+ static_assert(ten_million == 100000000, "");
+
+ }
+
+ namespace test_return_type_deduction
+ {
+
+ auto f(int& x) { return x; }
+ decltype(auto) g(int& x) { return x; }
+
+ template < typename T1, typename T2 >
+ struct is_same
+ {
+ static constexpr auto value = false;
+ };
+
+ template < typename T >
+ struct is_same<T, T>
+ {
+ static constexpr auto value = true;
+ };
+
+ int
+ test()
+ {
+ auto x = 0;
+ static_assert(is_same<int, decltype(f(x))>::value, "");
+ static_assert(is_same<int&, decltype(g(x))>::value, "");
+ return x;
+ }
+
+ }
+
+} // namespace cxx14
+
+#endif // __cplusplus >= 201402L
+
+]])
+
+
+dnl Tests for new features in C++17
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
+
+// If the compiler admits that it is not ready for C++17, why torture it?
+// Hopefully, this will speed up the test.
+
+#ifndef __cplusplus
+
+#error "This is not a C++ compiler"
+
+#elif __cplusplus < 201703L && !defined _MSC_VER
+
+#error "This is not a C++17 compiler"
+
+#else
+
+#include <initializer_list>
+#include <utility>
+#include <type_traits>
+
+namespace cxx17
+{
+
+ namespace test_constexpr_lambdas
+ {
+
+ constexpr int foo = [](){return 42;}();
+
+ }
+
+ namespace test::nested_namespace::definitions
+ {
+
+ }
+
+ namespace test_fold_expression
+ {
+
+ template<typename... Args>
+ int multiply(Args... args)
+ {
+ return (args * ... * 1);
+ }
+
+ template<typename... Args>
+ bool all(Args... args)
+ {
+ return (args && ...);
+ }
+
+ }
+
+ namespace test_extended_static_assert
+ {
+
+ static_assert (true);
+
+ }
+
+ namespace test_auto_brace_init_list
+ {
+
+ auto foo = {5};
+ auto bar {5};
+
+ static_assert(std::is_same<std::initializer_list<int>, decltype(foo)>::value);
+ static_assert(std::is_same<int, decltype(bar)>::value);
+ }
+
+ namespace test_typename_in_template_template_parameter
+ {
+
+ template<template<typename> typename X> struct D;
+
+ }
+
+ namespace test_fallthrough_nodiscard_maybe_unused_attributes
+ {
+
+ int f1()
+ {
+ return 42;
+ }
+
+ [[nodiscard]] int f2()
+ {
+ [[maybe_unused]] auto unused = f1();
+
+ switch (f1())
+ {
+ case 17:
+ f1();
+ [[fallthrough]];
+ case 42:
+ f1();
+ }
+ return f1();
+ }
+
+ }
+
+ namespace test_extended_aggregate_initialization
+ {
+
+ struct base1
+ {
+ int b1, b2 = 42;
+ };
+
+ struct base2
+ {
+ base2() {
+ b3 = 42;
+ }
+ int b3;
+ };
+
+ struct derived : base1, base2
+ {
+ int d;
+ };
+
+ derived d1 {{1, 2}, {}, 4}; // full initialization
+ derived d2 {{}, {}, 4}; // value-initialized bases
+
+ }
+
+ namespace test_general_range_based_for_loop
+ {
+
+ struct iter
+ {
+ int i;
+
+ int& operator* ()
+ {
+ return i;
+ }
+
+ const int& operator* () const
+ {
+ return i;
+ }
+
+ iter& operator++()
+ {
+ ++i;
+ return *this;
+ }
+ };
+
+ struct sentinel
+ {
+ int i;
+ };
+
+ bool operator== (const iter& i, const sentinel& s)
+ {
+ return i.i == s.i;
+ }
+
+ bool operator!= (const iter& i, const sentinel& s)
+ {
+ return !(i == s);
+ }
+
+ struct range
+ {
+ iter begin() const
+ {
+ return {0};
+ }
+
+ sentinel end() const
+ {
+ return {5};
+ }
+ };
+
+ void f()
+ {
+ range r {};
+
+ for (auto i : r)
+ {
+ [[maybe_unused]] auto v = i;
+ }
+ }
+
+ }
+
+ namespace test_lambda_capture_asterisk_this_by_value
+ {
+
+ struct t
+ {
+ int i;
+ int foo()
+ {
+ return [*this]()
+ {
+ return i;
+ }();
+ }
+ };
+
+ }
+
+ namespace test_enum_class_construction
+ {
+
+ enum class byte : unsigned char
+ {};
+
+ byte foo {42};
+
+ }
+
+ namespace test_constexpr_if
+ {
+
+ template <bool cond>
+ int f ()
+ {
+ if constexpr(cond)
+ {
+ return 13;
+ }
+ else
+ {
+ return 42;
+ }
+ }
+
+ }
+
+ namespace test_selection_statement_with_initializer
+ {
+
+ int f()
+ {
+ return 13;
+ }
+
+ int f2()
+ {
+ if (auto i = f(); i > 0)
+ {
+ return 3;
+ }
+
+ switch (auto i = f(); i + 4)
+ {
+ case 17:
+ return 2;
+
+ default:
+ return 1;
+ }
+ }
+
+ }
+
+ namespace test_template_argument_deduction_for_class_templates
+ {
+
+ template <typename T1, typename T2>
+ struct pair
+ {
+ pair (T1 p1, T2 p2)
+ : m1 {p1},
+ m2 {p2}
+ {}
+
+ T1 m1;
+ T2 m2;
+ };
+
+ void f()
+ {
+ [[maybe_unused]] auto p = pair{13, 42u};
+ }
+
+ }
+
+ namespace test_non_type_auto_template_parameters
+ {
+
+ template <auto n>
+ struct B
+ {};
+
+ B<5> b1;
+ B<'a'> b2;
+
+ }
+
+ namespace test_structured_bindings
+ {
+
+ int arr[2] = { 1, 2 };
+ std::pair<int, int> pr = { 1, 2 };
+
+ auto f1() -> int(&)[2]
+ {
+ return arr;
+ }
+
+ auto f2() -> std::pair<int, int>&
+ {
+ return pr;
+ }
+
+ struct S
+ {
+ int x1 : 2;
+ volatile double y1;
+ };
+
+ S f3()
+ {
+ return {};
+ }
+
+ auto [ x1, y1 ] = f1();
+ auto& [ xr1, yr1 ] = f1();
+ auto [ x2, y2 ] = f2();
+ auto& [ xr2, yr2 ] = f2();
+ const auto [ x3, y3 ] = f3();
+
+ }
+
+ namespace test_exception_spec_type_system
+ {
+
+ struct Good {};
+ struct Bad {};
+
+ void g1() noexcept;
+ void g2();
+
+ template<typename T>
+ Bad
+ f(T*, T*);
+
+ template<typename T1, typename T2>
+ Good
+ f(T1*, T2*);
+
+ static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);
+
+ }
+
+ namespace test_inline_variables
+ {
+
+ template<class T> void f(T)
+ {}
+
+ template<class T> inline T g(T)
+ {
+ return T{};
+ }
+
+ template<> inline void f<>(int)
+ {}
+
+ template<> int g<>(int)
+ {
+ return 5;
+ }
+
+ }
+
+} // namespace cxx17
+
+#endif // __cplusplus < 201703L && !defined _MSC_VER
+
+]])
+
+
+dnl Tests for new features in C++20
+
+m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_20], [[
+
+#ifndef __cplusplus
+
+#error "This is not a C++ compiler"
+
+#elif __cplusplus < 202002L && !defined _MSC_VER
+
+#error "This is not a C++20 compiler"
+
+#else
+
+#include <version>
+
+namespace cxx20
+{
+
+// As C++20 supports feature test macros in the standard, there is no
+// immediate need to actually test for feature availability on the
+// Autoconf side.
+
+} // namespace cxx20
+
+#endif // __cplusplus < 202002L && !defined _MSC_VER
+
+]])
diff --git a/build/m4/ax_gcc_func_attribute.m4 b/build/m4/ax_gcc_func_attribute.m4
new file mode 100644
index 00000000..fe226586
--- /dev/null
+++ b/build/m4/ax_gcc_func_attribute.m4
@@ -0,0 +1,223 @@
+# ===========================================================================
+# http://www.gnu.org/software/autoconf-archive/ax_gcc_func_attribute.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_GCC_FUNC_ATTRIBUTE(ATTRIBUTE)
+#
+# DESCRIPTION
+#
+# This macro checks if the compiler supports one of GCC's function
+# attributes; many other compilers also provide function attributes with
+# the same syntax. Compiler warnings are used to detect supported
+# attributes as unsupported ones are ignored by default so quieting
+# warnings when using this macro will yield false positives.
+#
+# The ATTRIBUTE parameter holds the name of the attribute to be checked.
+#
+# If ATTRIBUTE is supported define HAVE_FUNC_ATTRIBUTE_<ATTRIBUTE>.
+#
+# The macro caches its result in the ax_cv_have_func_attribute_<attribute>
+# variable.
+#
+# The macro currently supports the following function attributes:
+#
+# alias
+# aligned
+# alloc_size
+# always_inline
+# artificial
+# cold
+# const
+# constructor
+# constructor_priority for constructor attribute with priority
+# deprecated
+# destructor
+# dllexport
+# dllimport
+# error
+# externally_visible
+# flatten
+# format
+# format_arg
+# gnu_inline
+# hot
+# ifunc
+# leaf
+# malloc
+# noclone
+# noinline
+# nonnull
+# noreturn
+# nothrow
+# optimize
+# pure
+# unused
+# used
+# visibility
+# warning
+# warn_unused_result
+# weak
+# weakref
+#
+# Unsupported function attributes will be tested with a prototype returning
+# an int and not accepting any arguments and the result of the check might
+# be wrong or meaningless so use with care.
+#
+# LICENSE
+#
+# Copyright (c) 2013 Gabriele Svelto <gabriele.svelto@gmail.com>
+#
+# SPDX-License-Identifier: FSFAP
+
+#serial 4
+
+AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
+ AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1])
+
+ AC_CACHE_CHECK([for __attribute__(($1))], [ac_var], [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([
+ m4_case([$1],
+ [alias], [
+ int foo( void ) { return 0; }
+ int bar( void ) __attribute__(($1("foo")));
+ ],
+ [aligned], [
+ int foo( void ) __attribute__(($1(32)));
+ ],
+ [alloc_size], [
+ void *foo(int a) __attribute__(($1(1)));
+ ],
+ [always_inline], [
+ inline __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [artificial], [
+ inline __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [cold], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [const], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [constructor_priority], [
+ int foo( void ) __attribute__((__constructor__(65535/2)));
+ ],
+ [constructor], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [deprecated], [
+ int foo( void ) __attribute__(($1("")));
+ ],
+ [destructor], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [dllexport], [
+ __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [dllimport], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [error], [
+ int foo( void ) __attribute__(($1("")));
+ ],
+ [externally_visible], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [flatten], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [format], [
+ int foo(const char *p, ...) __attribute__(($1(printf, 1, 2)));
+ ],
+ [format_arg], [
+ char *foo(const char *p) __attribute__(($1(1)));
+ ],
+ [gnu_inline], [
+ inline __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [hot], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [ifunc], [
+ int my_foo( void ) { return 0; }
+ static int (*resolve_foo(void))(void) { return my_foo; }
+ int foo( void ) __attribute__(($1("resolve_foo")));
+ ],
+ [leaf], [
+ __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [malloc], [
+ void *foo( void ) __attribute__(($1));
+ ],
+ [noclone], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [noinline], [
+ __attribute__(($1)) int foo( void ) { return 0; }
+ ],
+ [nonnull], [
+ int foo(char *p) __attribute__(($1(1)));
+ ],
+ [noreturn], [
+ void foo( void ) __attribute__(($1));
+ ],
+ [nothrow], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [optimize], [
+ __attribute__(($1(3))) int foo( void ) { return 0; }
+ ],
+ [pure], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [returns_nonnull], [
+ void *foo( void ) __attribute__(($1));
+ ],
+ [unused], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [used], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [visibility], [
+ int foo_def( void ) __attribute__(($1("default")));
+ int foo_hid( void ) __attribute__(($1("hidden")));
+ int foo_int( void ) __attribute__(($1("internal")));
+ int foo_pro( void ) __attribute__(($1("protected")));
+ ],
+ [warning], [
+ int foo( void ) __attribute__(($1("")));
+ ],
+ [warn_unused_result], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [weak], [
+ int foo( void ) __attribute__(($1));
+ ],
+ [weakref], [
+ static int foo( void ) { return 0; }
+ static int bar( void ) __attribute__(($1("foo")));
+ ],
+ [
+ m4_warn([syntax], [Unsupported attribute $1, the test may fail])
+ int foo( void ) __attribute__(($1));
+ ]
+ )], [])
+ ],
+ dnl GCC doesn't exit with an error if an unknown attribute is
+ dnl provided but only outputs a warning, so accept the attribute
+ dnl only if no warning were issued.
+ [AS_IF([test -s conftest.err],
+ [AS_VAR_SET([ac_var], [no])],
+ [AS_VAR_SET([ac_var], [yes])])],
+ [AS_VAR_SET([ac_var], [no])])
+ ])
+
+ AS_IF([test yes = AS_VAR_GET([ac_var])],
+ [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_FUNC_ATTRIBUTE_$1), 1,
+ [Define to 1 if the system has the `$1' function attribute])], [])
+
+ AS_VAR_POPDEF([ac_var])
+])
diff --git a/build/m4/ax_pthread.m4 b/build/m4/ax_pthread.m4
new file mode 100644
index 00000000..9f35d139
--- /dev/null
+++ b/build/m4/ax_pthread.m4
@@ -0,0 +1,522 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_pthread.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+# This macro figures out how to build C programs using POSIX threads. It
+# sets the PTHREAD_LIBS output variable to the threads library and linker
+# flags, and the PTHREAD_CFLAGS output variable to any special C compiler
+# flags that are needed. (The user can also force certain compiler
+# flags/libs to be tested by setting these environment variables.)
+#
+# Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
+# needed for multi-threaded programs (defaults to the value of CC
+# respectively CXX otherwise). (This is necessary on e.g. AIX to use the
+# special cc_r/CC_r compiler alias.)
+#
+# NOTE: You are assumed to not only compile your program with these flags,
+# but also to link with them as well. For example, you might link with
+# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+# $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+#
+# If you are only building threaded programs, you may wish to use these
+# variables in your default LIBS, CFLAGS, and CC:
+#
+# LIBS="$PTHREAD_LIBS $LIBS"
+# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+# CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
+# CC="$PTHREAD_CC"
+# CXX="$PTHREAD_CXX"
+#
+# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
+# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
+# that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#
+# Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
+# PTHREAD_PRIO_INHERIT symbol is defined when compiling with
+# PTHREAD_CFLAGS.
+#
+# ACTION-IF-FOUND is a list of shell commands to run if a threads library
+# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+# is not found. If ACTION-IF-FOUND is not specified, the default action
+# will define HAVE_PTHREAD.
+#
+# Please let the authors know if this macro fails on any platform, or if
+# you have any other suggestions or comments. This macro was based on work
+# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
+# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
+# Alejandro Forero Cuervo to the autoconf macro repository. We are also
+# grateful for the helpful feedback of numerous users.
+#
+# Updated for Autoconf 2.68 by Daniel Richard G.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+# Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+# Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 31
+
+AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
+AC_DEFUN([AX_PTHREAD], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_REQUIRE([AC_PROG_CC])
+AC_REQUIRE([AC_PROG_SED])
+AC_LANG_PUSH([C])
+ax_pthread_ok=no
+
+# We used to check for pthread.h first, but this fails if pthread.h
+# requires special compiler flags (e.g. on Tru64 or Sequent).
+# It gets checked for in the link test anyway.
+
+# First of all, check if the user has set any of the PTHREAD_LIBS,
+# etcetera environment variables, and if threads linking works using
+# them:
+if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+ ax_pthread_save_CC="$CC"
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
+ AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+ AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
+ AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
+ AC_MSG_RESULT([$ax_pthread_ok])
+ if test "x$ax_pthread_ok" = "xno"; then
+ PTHREAD_LIBS=""
+ PTHREAD_CFLAGS=""
+ fi
+ CC="$ax_pthread_save_CC"
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+fi
+
+# We must check for the threads library under a number of different
+# names; the ordering is very important because some systems
+# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
+# libraries is broken (non-POSIX).
+
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
+
+ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+
+# The ordering *is* (sometimes) important. Some notes on the
+# individual items follow:
+
+# pthreads: AIX (must check this before -lpthread)
+# none: in case threads are in libc; should be tried before -Kthread and
+# other compiler flags to prevent continual compiler warnings
+# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+# (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
+# doesn't hurt to check since this sometimes defines pthreads and
+# -D_REENTRANT too), HP C (must be checked before -lpthread, which
+# is present but should not be used directly; and before -mthreads,
+# because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
+# pthread: Linux, etcetera
+# --thread-safe: KAI C++
+# pthread-config: use pthread-config program (for GNU Pth library)
+
+case $host_os in
+
+ freebsd*)
+
+ # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+ # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+
+ ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+ ;;
+
+ hpux*)
+
+ # From the cc(1) man page: "[-mt] Sets various -D flags to enable
+ # multi-threading and also sets -lpthread."
+
+ ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+ ;;
+
+ openedition*)
+
+ # IBM z/OS requires a feature-test macro to be defined in order to
+ # enable POSIX threads at all, so give the user a hint if this is
+ # not set. (We don't define these ourselves, as they can affect
+ # other portions of the system API in unpredictable ways.)
+
+ AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
+ [
+# if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+ AX_PTHREAD_ZOS_MISSING
+# endif
+ ],
+ [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
+ ;;
+
+ solaris*)
+
+ # On Solaris (at least, for some versions), libc contains stubbed
+ # (non-functional) versions of the pthreads routines, so link-based
+ # tests will erroneously succeed. (N.B.: The stubs are missing
+ # pthread_cleanup_push, or rather a function called by this macro,
+ # so we could check for that, but who knows whether they'll stub
+ # that too in a future libc.) So we'll check first for the
+ # standard Solaris way of linking pthreads (-mt -lpthread).
+
+ ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
+ ;;
+esac
+
+# Are we compiling with Clang?
+
+AC_CACHE_CHECK([whether $CC is Clang],
+ [ax_cv_PTHREAD_CLANG],
+ [ax_cv_PTHREAD_CLANG=no
+ # Note that Autoconf sets GCC=yes for Clang as well as GCC
+ if test "x$GCC" = "xyes"; then
+ AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
+ [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+# if defined(__clang__) && defined(__llvm__)
+ AX_PTHREAD_CC_IS_CLANG
+# endif
+ ],
+ [ax_cv_PTHREAD_CLANG=yes])
+ fi
+ ])
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
+
+AS_IF([test "x$GCC" = "xyes"],
+ [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
+
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
+
+AS_IF([test "x$ax_pthread_clang" = "xyes"],
+ [ax_pthread_flags="-pthread,-lpthread -pthread"])
+
+
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+
+case $host_os in
+ darwin* | hpux* | linux* | osf* | solaris*)
+ ax_pthread_check_macro="_REENTRANT"
+ ;;
+
+ aix*)
+ ax_pthread_check_macro="_THREAD_SAFE"
+ ;;
+
+ *)
+ ax_pthread_check_macro="--"
+ ;;
+esac
+AS_IF([test "x$ax_pthread_check_macro" = "x--"],
+ [ax_pthread_check_cond=0],
+ [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
+
+
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+
+ case $ax_pthread_try_flag in
+ none)
+ AC_MSG_CHECKING([whether pthreads work without any flags])
+ ;;
+
+ *,*)
+ PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+ PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+ AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
+ ;;
+
+ -*)
+ AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+ PTHREAD_CFLAGS="$ax_pthread_try_flag"
+ ;;
+
+ pthread-config)
+ AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
+ AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
+ PTHREAD_CFLAGS="`pthread-config --cflags`"
+ PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+ ;;
+
+ *)
+ AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
+ PTHREAD_LIBS="-l$ax_pthread_try_flag"
+ ;;
+ esac
+
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # Check for various functions. We must include pthread.h,
+ # since some functions may be macros. (On the Sequent, we
+ # need a special flag -Kthread to make this header compile.)
+ # We check for pthread_join because it is in -lpthread on IRIX
+ # while pthread_create is in libc. We check for pthread_attr_init
+ # due to DEC craziness with -lpthreads. We check for
+ # pthread_cleanup_push because it is one of the few pthread
+ # functions on Solaris that doesn't have a non-functional libc stub.
+ # We try pthread_create on general principles.
+
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
+# if $ax_pthread_check_cond
+# error "$ax_pthread_check_macro must be defined"
+# endif
+ static void *some_global = NULL;
+ static void routine(void *a)
+ {
+ /* To avoid any unused-parameter or
+ unused-but-set-parameter warning. */
+ some_global = a;
+ }
+ static void *start_routine(void *a) { return a; }],
+ [pthread_t th; pthread_attr_t attr;
+ pthread_create(&th, 0, start_routine, 0);
+ pthread_join(th, 0);
+ pthread_attr_init(&attr);
+ pthread_cleanup_push(routine, 0);
+ pthread_cleanup_pop(0) /* ; */])],
+ [ax_pthread_ok=yes],
+ [])
+
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+
+ AC_MSG_RESULT([$ax_pthread_ok])
+ AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
+
+ PTHREAD_LIBS=""
+ PTHREAD_CFLAGS=""
+done
+fi
+
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+ # Clang takes -pthread; it has never supported any other flag
+
+ # (Note 1: This will need to be revisited if a system that Clang
+ # supports has POSIX threads in a separate library. This tends not
+ # to be the way of modern systems, but it's conceivable.)
+
+ # (Note 2: On some systems, notably Darwin, -pthread is not needed
+ # to get POSIX threads support; the API is always present and
+ # active. We could reasonably leave PTHREAD_CFLAGS empty. But
+ # -pthread does define _REENTRANT, and while the Darwin headers
+ # ignore this macro, third-party headers might not.)
+
+ # However, older versions of Clang make a point of warning the user
+ # that, in an invocation where only linking and no compilation is
+ # taking place, the -pthread option has no effect ("argument unused
+ # during compilation"). They expect -pthread to be passed in only
+ # when source code is being compiled.
+ #
+ # Problem is, this is at odds with the way Automake and most other
+ # C build frameworks function, which is that the same flags used in
+ # compilation (CFLAGS) are also used in linking. Many systems
+ # supported by AX_PTHREAD require exactly this for POSIX threads
+ # support, and in fact it is often not straightforward to specify a
+ # flag that is used only in the compilation phase and not in
+ # linking. Such a scenario is extremely rare in practice.
+ #
+ # Even though use of the -pthread flag in linking would only print
+ # a warning, this can be a nuisance for well-run software projects
+ # that build with -Werror. So if the active version of Clang has
+ # this misfeature, we search for an option to squash it.
+
+ AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
+ [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
+ [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+ # Create an alternate version of $ac_link that compiles and
+ # links in two steps (.c -> .o, .o -> exe) instead of one
+ # (.c -> exe), because the warning occurs only in the second
+ # step
+ ax_pthread_save_ac_link="$ac_link"
+ ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+ ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
+ ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+ AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
+ CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+ ac_link="$ax_pthread_save_ac_link"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+ [ac_link="$ax_pthread_2step_ac_link"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+ [break])
+ ])
+ done
+ ac_link="$ax_pthread_save_ac_link"
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
+ ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+ ])
+
+ case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+ no | unknown) ;;
+ *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+ esac
+
+fi # $ax_pthread_clang = yes
+
+
+
+# Various other checks:
+if test "x$ax_pthread_ok" = "xyes"; then
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
+ AC_CACHE_CHECK([for joinable pthread attribute],
+ [ax_cv_PTHREAD_JOINABLE_ATTR],
+ [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+ for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
+ [int attr = $ax_pthread_attr; return attr /* ; */])],
+ [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
+ [])
+ done
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+ test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+ test "x$ax_pthread_joinable_attr_defined" != "xyes"],
+ [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
+ [$ax_cv_PTHREAD_JOINABLE_ATTR],
+ [Define to necessary symbol if this constant
+ uses a non-standard name on your system.])
+ ax_pthread_joinable_attr_defined=yes
+ ])
+
+ AC_CACHE_CHECK([whether more special flags are required for pthreads],
+ [ax_cv_PTHREAD_SPECIAL_FLAGS],
+ [ax_cv_PTHREAD_SPECIAL_FLAGS=no
+ case $host_os in
+ solaris*)
+ ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+ ;;
+ esac
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+ test "x$ax_pthread_special_flags_added" != "xyes"],
+ [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+ ax_pthread_special_flags_added=yes])
+
+ AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
+ [ax_cv_PTHREAD_PRIO_INHERIT],
+ [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
+ [[int i = PTHREAD_PRIO_INHERIT;
+ return i;]])],
+ [ax_cv_PTHREAD_PRIO_INHERIT=yes],
+ [ax_cv_PTHREAD_PRIO_INHERIT=no])
+ ])
+ AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+ test "x$ax_pthread_prio_inherit_defined" != "xyes"],
+ [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
+ ax_pthread_prio_inherit_defined=yes
+ ])
+
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+
+ # More AIX lossage: compile with *_r variant
+ if test "x$GCC" != "xyes"; then
+ case $host_os in
+ aix*)
+ AS_CASE(["x/$CC"],
+ [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+ [#handle absolute path differently from PATH based program lookup
+ AS_CASE(["x$CC"],
+ [x/*],
+ [
+ AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
+ AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
+ ],
+ [
+ AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
+ AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
+ ]
+ )
+ ])
+ ;;
+ esac
+ fi
+fi
+
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
+AC_SUBST([PTHREAD_LIBS])
+AC_SUBST([PTHREAD_CFLAGS])
+AC_SUBST([PTHREAD_CC])
+AC_SUBST([PTHREAD_CXX])
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test "x$ax_pthread_ok" = "xyes"; then
+ ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
+ :
+else
+ ax_pthread_ok=no
+ $2
+fi
+AC_LANG_POP
+])dnl AX_PTHREAD
diff --git a/build/m4/jemalloc.m4 b/build/m4/jemalloc.m4
new file mode 100644
index 00000000..c2008a8e
--- /dev/null
+++ b/build/m4/jemalloc.m4
@@ -0,0 +1,75 @@
+dnl -------------------------------------------------------- -*- autoconf -*-
+dnl SPDX-License-Identifier: Apache-2.0
+
+dnl
+dnl jemalloc.m4: Trafficserver's jemalloc autoconf macros
+dnl modified to skip other TS_ helpers
+dnl
+
+AC_DEFUN([TS_CHECK_JEMALLOC], [
+AC_ARG_WITH([jemalloc-prefix],
+ [AS_HELP_STRING([--with-jemalloc-prefix=PREFIX],[Specify the jemalloc prefix [default=""]])],
+ [
+ jemalloc_prefix="$withval"
+ ],[
+ if test "`uname -s`" = "Darwin"; then
+ jemalloc_prefix="je_"
+ else
+ jemalloc_prefix=""
+ fi
+ ]
+)
+AC_DEFINE_UNQUOTED([prefix_jemalloc], [${jemalloc_prefix}], [jemalloc prefix])
+
+enable_jemalloc=no
+AC_ARG_WITH([jemalloc], [AS_HELP_STRING([--with-jemalloc=DIR], [use a specific jemalloc library])],
+[
+ if test "$withval" != "no"; then
+ if test "x${enable_tcmalloc}" = "xyes"; then
+ AC_MSG_ERROR([Cannot compile with both jemalloc and tcmalloc])
+ fi
+ enable_jemalloc=yes
+ jemalloc_base_dir="$withval"
+ case "$withval" in
+ yes)
+ jemalloc_base_dir="/usr"
+ AC_MSG_CHECKING(checking for jemalloc includes standard directories)
+ ;;
+ *":"*)
+ jemalloc_include="`echo $withval |sed -e 's/:.*$//'`"
+ jemalloc_ldflags="`echo $withval |sed -e 's/^.*://'`"
+ AC_MSG_CHECKING(checking for jemalloc includes in $jemalloc_include libs in $jemalloc_ldflags)
+ ;;
+ *)
+ jemalloc_include="$withval/include"
+ jemalloc_ldflags="$withval/lib"
+ AC_MSG_CHECKING(checking for jemalloc includes in $withval)
+ ;;
+ esac
+ fi
+])
+
+has_jemalloc=0
+if test "$enable_jemalloc" != "no"; then
+ jemalloc_have_headers=0
+ jemalloc_have_libs=0
+ if test "$jemalloc_base_dir" != "/usr"; then
+ CFLAGS="${CFLAGS} -I${jemalloc_include}"
+ LDFLAGS="${LDFLAGS} -L${jemalloc_ldflags}"
+ LIBTOOL_LINK_FLAGS="${LIBTOOL_LINK_FLAGS} -R${jemalloc_ldflags}"
+ fi
+ func="${jemalloc_prefix}malloc_stats_print"
+ AC_CHECK_LIB(jemalloc, ${func}, [jemalloc_have_libs=1])
+ if test "$jemalloc_have_libs" != "0"; then
+ AC_CHECK_HEADERS([jemalloc/jemalloc.h], [jemalloc_have_headers=1])
+ fi
+ if test "$jemalloc_have_headers" != "0"; then
+ has_jemalloc=1
+ LIBS="${LIBS} -ljemalloc"
+ AC_DEFINE(has_jemalloc, [1], [Link/compile against jemalloc])
+ else
+ AC_MSG_ERROR([Couldn't find a jemalloc installation])
+ fi
+fi
+AC_SUBST(has_jemalloc)
+])
diff --git a/build/m4/tcmalloc.m4 b/build/m4/tcmalloc.m4
new file mode 100644
index 00000000..765d2acc
--- /dev/null
+++ b/build/m4/tcmalloc.m4
@@ -0,0 +1,45 @@
+dnl -------------------------------------------------------- -*- autoconf -*-
+dnl SPDX-License-Identifier: Apache-2.0
+
+dnl
+dnl tcmalloc.m4: Trafficserver's tcmalloc autoconf macros
+dnl modified to skip other TS_ helpers
+dnl
+
+dnl This is kinda fugly, but need a way to both specify a directory and which
+dnl of the many tcmalloc libraries to use ...
+AC_DEFUN([TS_CHECK_TCMALLOC], [
+AC_ARG_WITH([tcmalloc-lib],
+ [AS_HELP_STRING([--with-tcmalloc-lib],[specify the tcmalloc library to use [default=tcmalloc]])],
+ [
+ with_tcmalloc_lib="$withval"
+ ],[
+ with_tcmalloc_lib="tcmalloc"
+ ]
+)
+
+has_tcmalloc=0
+AC_ARG_WITH([tcmalloc], [AS_HELP_STRING([--with-tcmalloc=DIR], [use the tcmalloc library])],
+[
+ if test "$withval" != "no"; then
+ if test "x${enable_jemalloc}" = "xyes"; then
+ AC_MSG_ERROR([Cannot compile with both tcmalloc and jemalloc])
+ fi
+ tcmalloc_have_lib=0
+ if test "x$withval" != "xyes" && test "x$withval" != "x"; then
+ tcmalloc_ldflags="$withval/lib"
+ LDFLAGS="${LDFLAGS} -L${tcmalloc_ldflags}"
+ LIBTOOL_LINK_FLAGS="${LIBTOOL_LINK_FLAGS} -rpath ${tcmalloc_ldflags}"
+ fi
+ AC_CHECK_LIB(${with_tcmalloc_lib}, tc_cfree, [tcmalloc_have_lib=1])
+ if test "$tcmalloc_have_lib" != "0"; then
+ LIBS="${LIBS} -l${with_tcmalloc_lib}"
+ has_tcmalloc=1
+ AC_DEFINE(has_tcmalloc, [1], [Link/compile against tcmalloc])
+ else
+ AC_MSG_ERROR([Couldn't find a tcmalloc installation])
+ fi
+ fi
+])
+AC_SUBST(has_tcmalloc)
+])
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 13:05:05 +0000