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Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..2defd94 --- /dev/null +++ b/configure.ac @@ -0,0 +1,232 @@ +# Configure template for GNU M4. -*-Autoconf-*- +# Copyright (C) 1991, 1993-1994, 2004-2013 Free Software Foundation, +# Inc. +# +# This file is part of GNU M4. +# +# GNU M4 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. +# +# GNU M4 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 <http://www.gnu.org/licenses/>. + +AC_PREREQ([2.62]) +AC_INIT([GNU M4], m4_esyscmd([build-aux/git-version-gen .tarball-version]), + [bug-m4@gnu.org]) +AC_CONFIG_AUX_DIR([build-aux]) + +AM_INIT_AUTOMAKE([1.11.6 dist-bzip2 dist-xz color-tests parallel-tests +silent-rules subdir-objects gnu]) + +m4_pattern_forbid([^M4_[A-Z]]) + +AC_CONFIG_SRCDIR([src/m4.h]) +AC_CONFIG_HEADERS([lib/config.h:lib/config.hin]) + +AC_PROG_CC +AC_DEFUN([gl_CXX_CHOICE_DEFAULT_NO]) +M4_EARLY + +# Maintainer note - comment this line out if you plan to rerun +# GNULIB_POSIXCHECK testing to see if M4 should be using more modules. +# Leave it uncommented for normal releases, for faster ./configure. +gl_ASSERT_NO_GNULIB_POSIXCHECK + +# M4 is single-threaded; so we can optimize gnulib code by using this: +gl_DISABLE_THREADS + +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], + [if test -d "$srcdir"/.git; then + gl_gcc_warnings=yes + else + gl_gcc_warnings=no + fi] +) + +if test "$gl_gcc_warnings" = yes; then + gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) + AC_SUBST([WERROR_CFLAGS]) + + # We use '#pragma GCC diagnostic push' to silence some + # warnings, but older gcc doesn't support this. + AC_CACHE_CHECK([whether pragma GCC diagnostic push works], + [M4_cv_gcc_pragma_push_works], [ + save_CFLAGS=$CFLAGS + CFLAGS='-Wunknown-pragmas -Werror' + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + #pragma GCC diagnostic push + #pragma GCC diagnostic pop + ]])], + [M4_cv_gcc_pragma_push_works=yes], + [M4_cv_gcc_pragma_push_works=no]) + CFLAGS=$save_CFLAGS]) + + # This, $nw, is the list of warnings we disable. + nw= + nw="$nw -Waggregate-return" # K&R is anachronistic + nw="$nw -Wtraditional-conversion" # K&R is anachronistic + nw="$nw -Wundef" # K&R is anachronistic + nw="$nw -Wtraditional" # K&R is anachronistic + nw="$nw -Wlong-long" # C90 is anachronistic + nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings + nw="$nw -Wpadded" # Our structs are not packed + nw="$nw -Wconversion" # Too many warnings for now + nw="$nw -Wsign-conversion" # Too many warnings for now + nw="$nw -Wcast-qual" # Too many warnings for now + nw="$nw -Wswitch-enum" # Too many warnings for now + # gcc 4.4.6 complains enum-compare is C++ only; gcc 4.7.0 implies it in -Wall + nw="$nw -Wenum-compare" + + # Gnulib uses '#pragma GCC diagnostic push' to silence some + # warnings, but older gcc doesn't support this. + AC_CACHE_CHECK([whether pragma GCC diagnostic push works], + [M4_cv_gcc_pragma_push_works], [ + save_CFLAGS=$CFLAGS + CFLAGS='-Wunknown-pragmas -Werror' + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + #pragma GCC diagnostic push + #pragma GCC diagnostic pop + ]])], + [M4_cv_gcc_pragma_push_works=yes], + [M4_cv_gcc_pragma_push_works=no]) + CFLAGS=$save_CFLAGS]) + if test $M4_cv_gcc_pragma_push_works = no; then + nw="$nw -Wmissing-prototypes" + nw="$nw -Wmissing-declarations" + nw="$nw -Wunreachable-code" + fi + + gl_MANYWARN_ALL_GCC([ws]) + gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw]) + for w in $ws; do + gl_WARN_ADD([$w]) + done + + # Gnulib turns on -Wformat=2, which implies -Wformat-nonliteral, but + # we temporarily override it in format.c if possible. + if test $M4_cv_gcc_pragma_push_works = no; then + gl_WARN_ADD([-Wno-format-nonliteral]) + fi + + gl_WARN_ADD([-fdiagnostics-show-option]) + gl_WARN_ADD([-funit-at-a-time]) + + AC_SUBST([WARN_CFLAGS]) + + AH_VERBATIM([FORTIFY_SOURCE], + [/* Enable compile-time and run-time bounds-checking, and some warnings, + without upsetting newer glibc. */ + #if defined __OPTIMIZE__ && __OPTIMIZE__ + # define _FORTIFY_SOURCE 2 + #endif + ]) +fi + +# Tandem/NSK is broken - it has 'long long int' but not +# 'unsigned long long int', which confuses assumptions made by gnulib. +# Simply pretend that neither type exists if both do not work. +AC_TYPE_LONG_LONG_INT +AC_TYPE_UNSIGNED_LONG_LONG_INT +if test $ac_cv_type_long_long_int:$ac_cv_type_unsigned_long_long_int = yes:no +then + ac_cv_type_long_long_int=no + AC_DEFINE([HAVE_LONG_LONG_INT], 0, + [Define to 1 if the system has the type `long long int'.]) +fi + +M4_INIT + +AC_CACHE_CHECK([whether an open file can be renamed], + [M4_cv_func_rename_open_file_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], + [FILE *f = fopen ("conftest.1", "w+"); + int result = rename ("conftest.1", "conftest.2"); + fclose (f); remove ("conftest.1"); remove ("conftest.2"); + return result;])], + [M4_cv_func_rename_open_file_works=yes], + [M4_cv_func_rename_open_file_works=no], + [M4_cv_func_rename_open_file_works='guessing no'])]) +if test "$M4_cv_func_rename_open_file_works" = yes ; then + M4_rename_open_works=1 +else + M4_rename_open_works=0 +fi +AC_DEFINE_UNQUOTED([RENAME_OPEN_FILE_WORKS], [$M4_rename_open_works], + [Define to 1 if a file can be renamed while open, or to 0 if not.]) + +dnl Don't let changeword get in our way, if bootstrapping with a version of +dnl m4 that already turned the feature on. +m4_ifdef([changeword], [m4_undefine([changeword])])dnl + +AC_MSG_CHECKING([[if changeword is wanted]]) +AC_ARG_ENABLE([changeword], + [AS_HELP_STRING([--enable-changeword], + [enable -W and changeword() builtin])], + [if test "$enableval" = yes; then + AC_MSG_RESULT([yes]) + AC_DEFINE([ENABLE_CHANGEWORD], [1], + [Define to 1 if the changeword(REGEXP) functionality is wanted]) + else + AC_MSG_RESULT([no]) + fi], [AC_MSG_RESULT([no])]) + +AC_MSG_CHECKING([[which shell to use for syscmd]]) +AC_ARG_WITH([syscmd-shell], + [AS_HELP_STRING([--with-syscmd-shell], [shell used by syscmd [/bin/sh]])], + [case $withval in + yes[)] with_syscmd_shell=no;; + esac], [with_syscmd_shell=no]) +if test "$with_syscmd_shell" = no ; then + with_syscmd_shell=/bin/sh + if test "$cross_compiling" != yes ; then +dnl Give mingw a default that is more likely to be available. + AS_IF([AS_EXECUTABLE_P([/bin/sh])], [], + [if (cmd /c) 2>/dev/null; then with_syscmd_shell=cmd; fi]) +dnl Too bad _AS_PATH_WALK is not public. + M4_save_IFS=$IFS; IFS=$PATH_SEPARATOR + for M4_dir in `if (command -p getconf PATH) 2>/dev/null ; then + command -p getconf PATH + else + echo "/bin$PATH_SEPARATOR$PATH" + fi` + do + IFS=$M4_save_IFS + test -z "$M4_dir" && continue + AS_EXECUTABLE_P(["$M4_dir/sh"]) \ + && { with_syscmd_shell=$M4_dir/sh; break; } + done + IFS=$M4_save_IFS + fi +fi +AC_MSG_RESULT([$with_syscmd_shell]) +AC_DEFINE_UNQUOTED([SYSCMD_SHELL], ["$with_syscmd_shell"], + [Shell used by syscmd and esyscmd, must accept -c argument.]) + +M4_WITH_DMALLOC + +AC_CONFIG_COMMANDS([stamp-h], [[test -z "$CONFIG_HEADERS" || date > stamp-h]]) + +AC_CONFIG_FILES([Makefile + doc/Makefile + lib/Makefile + src/Makefile + tests/Makefile + checks/Makefile + examples/Makefile +]) + +AC_OUTPUT |