diff options
Diffstat (limited to 'src/grep/configure.ac')
| -rw-r--r-- | src/grep/configure.ac | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/grep/configure.ac b/src/grep/configure.ac new file mode 100644 index 0000000..c49ec4a --- /dev/null +++ b/src/grep/configure.ac @@ -0,0 +1,219 @@ +dnl +dnl autoconf input file for GNU grep +dnl +dnl Copyright (C) 1997-2006, 2009-2021 Free Software Foundation, Inc. +dnl +dnl This file is part of GNU grep. +dnl +dnl This program is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 3, or (at your option) +dnl any later version. +dnl +dnl This program is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with this program. If not, see <https://www.gnu.org/licenses/>. + +AC_INIT([GNU grep], + m4_esyscmd([build-aux/git-version-gen .tarball-version]), + [bug-grep@gnu.org]) + +if test -n "$GREP" || test -n "$EGREP"; then + AC_MSG_ERROR( + [no working 'grep' found + A working 'grep' command is needed to build GNU Grep. + This 'grep' should support -e and long lines. + On Solaris 10, install the package SUNWggrp or SUNWxcu4. + On Solaris 11, install the package text/gnu-grep or system/xopen/xcu4.]) +fi + +AC_CONFIG_AUX_DIR([build-aux]) +AC_CONFIG_SRCDIR([src/grep.c]) +AC_DEFINE([GREP], 1, [We are building grep]) +AC_PREREQ([2.64]) +AC_CONFIG_MACRO_DIRS([m4]) + +dnl Automake stuff. +AM_INIT_AUTOMAKE([1.11 dist-xz color-tests parallel-tests + subdir-objects]) +AM_SILENT_RULES([yes]) # make --enable-silent-rules the default. + +AC_CONFIG_HEADERS([config.h:config.hin]) + +dnl Checks for programs. +AC_CANONICAL_HOST +AC_PROG_AWK +AC_PROG_INSTALL +AC_PROG_CC +gl_EARLY +AC_PROG_RANLIB +PKG_PROG_PKG_CONFIG([0.9.0]) + +# grep never invokes mbrtowc or mbrlen on empty input, +# so don't worry about this common bug, +# as working around it would merely slow grep down. +gl_cv_func_mbrtowc_empty_input='assume yes' + +dnl Checks for typedefs, structures, and compiler characteristics. +AC_TYPE_SIZE_T +AC_C_CONST +gl_INIT + +# Ensure VLAs are not used. +# Note -Wvla is implicitly added by gl_MANYWARN_ALL_GCC +AC_DEFINE([GNULIB_NO_VLA], [1], [Define to 1 to disable use of VLAs]) + +# The test suite needs to know if we have a working perl. +# FIXME: this is suboptimal. Ideally, we would be able to call gl_PERL +# with an ACTION-IF-NOT-FOUND argument ... +cu_have_perl=yes +case $PERL in *"/missing "*) cu_have_perl=no;; esac +AM_CONDITIONAL([HAVE_PERL], [test $cu_have_perl = yes]) + +AC_ARG_ENABLE([gcc-warnings], + [AS_HELP_STRING([--enable-gcc-warnings], + [turn on lots of GCC warnings (for developers)])], + [case $enableval in + yes|no) ;; + *) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;; + esac + gl_gcc_warnings=$enableval], + [gl_gcc_warnings=no + if test "$GCC" = yes && test -d "$srcdir"/.git; then + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[ + #if ! (6 < __GNUC__ + (2 <= __GNUC_MINOR__)) + #error "--enable-gcc-warnings defaults to 'no' on older GCC" + #endif + ]])], + [gl_gcc_warnings=yes]) + fi] +) + +if test "$gl_gcc_warnings" = yes; then + gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) + AC_SUBST([WERROR_CFLAGS]) + + nw= + # This, $nw, is the list of warnings we disable. + nw="$nw -Wdeclaration-after-statement" # too useful to forbid + nw="$nw -Waggregate-return" # anachronistic + nw="$nw -Wlong-long" # C90 is anachronistic (lib/gethrxtime.h) + nw="$nw -Wc++-compat" # We don't care about C++ compilers + nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib + nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings + nw="$nw -Wpadded" # Our structs are not padded + nw="$nw -Wstack-protector" # generates false alarms for useful code + nw="$nw -Wswitch-default" # Too many warnings for now + nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations + nw="$nw -Winline" # streq.h's streq4, streq6 and strcaseeq6 + nw="$nw -Wstrict-overflow" # regexec.c + + gl_MANYWARN_ALL_GCC([ws]) + gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw]) + for w in $ws; do + gl_WARN_ADD([$w]) + done + gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one + gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now + gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now + gl_WARN_ADD([-Wno-cast-function-type]) # sig-handler.h's sa_handler_t cast + + # In spite of excluding -Wlogical-op above, it is enabled, as of + # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c + gl_WARN_ADD([-Wno-logical-op]) + + AC_SUBST([WARN_CFLAGS]) + + AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.]) + AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks]) + AH_VERBATIM([GNULIB_PORTCHECK_FORTIFY_SOURCE], + [/* Enable compile-time and run-time bounds-checking, and some warnings, + without upsetting glibc 2.15+. */ + #if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \ + && defined __OPTIMIZE__ && __OPTIMIZE__) + # define _FORTIFY_SOURCE 2 + #endif + ]) + + # We use a slightly smaller set of warning options for lib/. + # Remove the following and save the result in GNULIB_WARN_CFLAGS. + nw= + nw="$nw -Wunused-macros" + gl_WARN_ADD([-Wno-format-nonliteral]) + gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw]) + AC_SUBST([GNULIB_WARN_CFLAGS]) + + # For gnulib-tests, the set is slightly smaller still. + nw= + nw="$nw -Wstrict-prototypes" + # It's not worth being this picky about test programs. + nw="$nw -Wsuggest-attribute=const" + nw="$nw -Wsuggest-attribute=pure" + nw="$nw -Wsuggest-attribute=format" + nw="$nw -Wformat-truncation=2" # False alarm in strerror_r.c + nw="$nw -Wold-style-definition" + + # Disable to avoid warnings in e.g., test-intprops.c and test-limits-h.c + # due to overlong expansions like this: + # test-intprops.c:147:5: error: string literal of length 9531 exceeds \ + # maximum length 4095 that ISO C99 compilers are required to support + nw="$nw -Woverlength-strings" + + gl_MANYWARN_COMPLEMENT([GNULIB_TEST_WARN_CFLAGS], + [$GNULIB_WARN_CFLAGS], [$nw]) + gl_WARN_ADD([-Wno-return-type], [GNULIB_TEST_WARN_CFLAGS]) + AC_SUBST([GNULIB_TEST_WARN_CFLAGS]) +fi + +# By default, argmatch should fail calling usage (EXIT_FAILURE). +AC_DEFINE([ARGMATCH_DIE], [usage (EXIT_FAILURE)], + [Define to the function xargmatch calls on failures.]) +AC_DEFINE([ARGMATCH_DIE_DECL], [void usage (int _e)], + [Define to the declaration of the xargmatch failure function.]) + +dnl Checks for header files. +AC_HEADER_DIRENT + +dnl Checks for functions. +AC_FUNC_CLOSEDIR_VOID + +AC_CHECK_FUNCS_ONCE([isascii setlocale]) + +dnl I18N feature +AM_GNU_GETTEXT_VERSION([0.18.2]) +AM_GNU_GETTEXT([external]) + +dnl Some installers want to be informed if we do not use our regex. +dnl For example, if the host platform uses dynamic linking and the installer +dnl knows that the grep may be invoked on other hosts with buggy libraries, +dnl then the installer should configure --with-included-regex. +AM_CONDITIONAL([USE_INCLUDED_REGEX], [test "$ac_use_included_regex" = yes]) +if test "$ac_use_included_regex" = no; then + AC_MSG_WARN([Included lib/regex.c not used]) +fi + +gl_FUNC_PCRE +AM_CONDITIONAL([USE_PCRE], [test $use_pcre = yes]) + +case $host_os in + mingw*) suffix=w32 ;; + *) suffix=posix ;; +esac +COLORIZE_SOURCE=colorize-$suffix.c +AC_SUBST([COLORIZE_SOURCE]) + +AC_CONFIG_FILES([ + Makefile + lib/Makefile + src/Makefile + tests/Makefile + po/Makefile.in + doc/Makefile + gnulib-tests/Makefile +]) +AC_OUTPUT |