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Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 0000000..13b1e02 --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,178 @@ +# from http://autoconf-archive.cryp.to/ax_tls.html +# +# This was licensed under the GPL with the following exception: +# +# 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 Macro 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. +# +AC_DEFUN([AX_TLS], [ + AC_MSG_CHECKING(for thread local storage (TLS) class) + AC_CACHE_VAL(ac_cv_tls, [ + ax_tls_keywords="__thread __declspec(thread) none" + for ax_tls_keyword in $ax_tls_keywords; do + case $ax_tls_keyword in + none) ac_cv_tls=none ; break ;; + *) + AC_TRY_COMPILE( + [#include <stdlib.h> + static void + foo(void) { + static ] $ax_tls_keyword [ int bar; + exit(1); + }], + [], + [ac_cv_tls=$ax_tls_keyword ; break], + ac_cv_tls=none + ) + esac + done +]) + + if test "$ac_cv_tls" != "none"; then + dnl AC_DEFINE([TLS], [], [If the compiler supports a TLS storage class define it to that here]) + AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [If the compiler supports a TLS storage class define it to that here]) + fi + AC_MSG_RESULT($ac_cv_tls) +]) + +# =========================================================================== +# http://www.nongnu.org/autoconf-archive/check_gnu_make.html +# =========================================================================== +# +# SYNOPSIS +# +# CHECK_GNU_MAKE() +# +# DESCRIPTION +# +# This macro searches for a GNU version of make. If a match is found, the +# makefile variable `ifGNUmake' is set to the empty string, otherwise it +# is set to "#". This is useful for including a special features in a +# Makefile, which cannot be handled by other versions of make. The +# variable _cv_gnu_make_command is set to the command to invoke GNU make +# if it exists, the empty string otherwise. +# +# Here is an example of its use: +# +# Makefile.in might contain: +# +# # A failsafe way of putting a dependency rule into a makefile +# $(DEPEND): +# $(CC) -MM $(srcdir)/*.c > $(DEPEND) +# +# @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND))) +# @ifGNUmake@ include $(DEPEND) +# @ifGNUmake@ endif +# +# Then configure.in would normally contain: +# +# CHECK_GNU_MAKE() +# AC_OUTPUT(Makefile) +# +# Then perhaps to cause gnu make to override any other make, we could do +# something like this (note that GNU make always looks for GNUmakefile +# first): +# +# if ! test x$_cv_gnu_make_command = x ; then +# mv Makefile GNUmakefile +# echo .DEFAULT: > Makefile ; +# echo \ $_cv_gnu_make_command \$@ >> Makefile; +# fi +# +# Then, if any (well almost any) other make is called, and GNU make also +# exists, then the other make wraps the GNU make. +# +# LICENSE +# +# Copyright (c) 2008 John Darrington <j.darrington@elvis.murdoch.edu.au> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. +# +# Note: Modified by Ted Ts'o to add @ifNotGNUMake@ + +AC_DEFUN( + [CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command, + _cv_gnu_make_command='' ; +dnl Search all the common names for GNU make + if test -n "$FORCE_NATIVE_MAKE" ; then + MAKES="make" + else + MAKES="make gmake gnumake" + fi + for a in "$MAKE" $MAKES ; do + if test -z "$a" ; then continue ; fi ; + if ( sh -c "$a --version" 2> /dev/null | grep GNU 2>&1 > /dev/null ) ; then + _cv_gnu_make_command=$a ; + break; + fi + done ; + ) ; +dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' otherwise + if test "x$_cv_gnu_make_command" != "x" ; then + ifGNUmake='' ; + ifNotGNUmake='#' ; + else + ifGNUmake='#' ; + ifNotGNUmake='' ; + AC_MSG_RESULT("Not found"); + fi + AC_SUBST(ifGNUmake) + AC_SUBST(ifNotGNUmake) +] ) + +# AX_CHECK_MOUNT_OPT: an autoconf macro to check for generic filesystem- +# agnostic 'mount' options. Written by Nicholas Clark. Looks for constants in +# sys/mount.h to predict whether the 'mount' utility will support a specific +# mounting option. +# +# This macro can be used to check for the presence of 'nodev' (or other mount +# options), which isn't uniformly implemented in the BSD family at the time of +# this writing. Tested on FreeBSD, NetBSD, OpenBSD, and Linux. +# +# Usage: +# +# AX_CHECK_MOUNT_OPT(option) +# +# Defines HAVE_MOUNT_$OPTION (in uppercase) if the option exists, and sets +# ac_cv_mount_$option (in original case) otherwise. +# +# Copyright (c) 2018 Nicholas Clark <nicholas.clark@gmail.com> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty or attribution requirement. + +AC_DEFUN([AX_CHECK_MOUNT_OPT], [__AX_CHECK_MOUNT_OPT(m4_tolower([$1]),m4_toupper([$1]))]) +AC_DEFUN([__AX_CHECK_MOUNT_OPT], +[ + AS_ECHO_N("checking for mount '$1' option... ") + AC_TRY_COMPILE( + [#include <sys/mount.h>], + [void *temp = (void *)(MS_$2); (void) temp;], + [AC_DEFINE(HAVE_MOUNT_$2, 1, [Define to 1 if mount supports $1.]) + AS_VAR_SET(ac_cv_mount_$1, yes) + AS_ECHO("yes")], + [AC_TRY_COMPILE( + [#include <sys/mount.h>], + [void *temp = (void *)(MNT_$2); (void) temp;], + [AC_DEFINE(HAVE_MOUNT_$2, 1, [Define to 1 if mount supports $1.]) + AS_VAR_SET(ac_cv_mount_$1, yes) + AS_ECHO("yes")], + [AS_VAR_SET(ac_cv_mount_$1, no) + AS_ECHO("no")] + )] + ) +]) |