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dnl
dnl autoconf input file for GNU grep
dnl
dnl Copyright (C) 1997-2006, 2009-2014 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 <http://www.gnu.org/licenses/>.
AC_INIT([GNU grep],
m4_esyscmd([build-aux/git-version-gen .tarball-version]),
[bug-grep@gnu.org])
# Set the GREP and EGREP variables to a dummy replacement for the 'grep'
# command, so that AC_PROG_GREP and AC_PROG_EGREP don't fail when no good
# 'grep' program is found. This makes it possible to build GNU grep on a
# Solaris machine that has only /usr/bin/grep and no /usr/xpg4/bin/grep.
# This function supports only restricted arguments:
# - No file names as arguments, process only standard input.
# - Only literal strings without backslashes, no regular expressions.
# - The only options are -e and -E (and -Ee).
# This function also does not support long lines beyond what the shell
# supports), and backslash-processes the input.
fn_grep () {
test "$1" = -E && shift
case $@%:@:$1 in
0:*) AC_MSG_ERROR([fn_grep: expected pattern]) ;;
1:-*) AC_MSG_ERROR([fn_grep: invalid command line]) ;;
1:*) pattern=$1 ;;
2:--|2:-e|2:-Ee) pattern=$2 ;;
*) AC_MSG_ERROR([fn_grep: invalid command line]) ;;
esac
case $pattern in
[*['].^$\*[']*]) dnl The outer brackets are for M4.
AC_MSG_ERROR([fn_grep: regular expressions not supported]) ;;
esac
rc=1
while read line; do
case $line in
*$pattern*)
rc=0
AS_ECHO([$line]) ;;
esac
done
return $rc
}
test -n "$GREP" || GREP=fn_grep
test -n "$EGREP" || EGREP=fn_grep
ac_cv_path_EGREP=$EGREP
AC_CONFIG_AUX_DIR(build-aux)
AC_CONFIG_SRCDIR(src/grep.c)
AC_DEFINE([GREP], 1, [We are building grep])
AC_PREREQ(2.59)
AC_CONFIG_MACRO_DIRS([m4])
dnl Automake stuff.
AM_INIT_AUTOMAKE([1.11 no-dist-gzip 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
dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_SIZE_T
AC_C_CONST
gl_INIT
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])
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="$nw -Wtraditional" # Warns on #elif which we use often
nw="$nw -Wcast-qual" # Too many warnings for now
nw="$nw -Wconversion" # Too many warnings for now
nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
nw="$nw -Wsign-conversion" # Too many warnings for now
nw="$nw -Wtraditional-conversion" # Too many warnings for now
nw="$nw -Wunreachable-code" # Too many warnings for now
nw="$nw -Wpadded" # Our structs are not padded
nw="$nw -Wredundant-decls" # openat.h declares e.g., mkdirat
nw="$nw -Wlogical-op" # any use of fwrite provokes this
nw="$nw -Wformat-nonliteral" # who.c and pinky.c strftime uses
nw="$nw -Wvla" # warnings in gettext.h
nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
nw="$nw -Wswitch-enum" # Too many warnings for now
nw="$nw -Wswitch-default" # Too many warnings for now
nw="$nw -Wstack-protector" # not worth working around
# things I might fix soon:
nw="$nw -Wfloat-equal" # sort.c, seq.c
nw="$nw -Wmissing-format-attribute" # copy.c
nw="$nw -Wunsafe-loop-optimizations" # a few src/*.c
nw="$nw -Winline" # system.h's readdir_ignoring_dot_and_dotdot
nw="$nw -Wstrict-overflow" # expr.c, pr.c, tr.c, factor.c
# ?? -Wstrict-overflow
gl_MANYWARN_ALL_GCC([ws])
gl_MANYWARN_COMPLEMENT([ws], [$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
# 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.])
AH_VERBATIM([FORTIFY_SOURCE],
[/* Enable compile-time and run-time bounds-checking, and some warnings,
without upsetting glibc 2.15+. */
#if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
# define _FORTIFY_SOURCE 2
#endif
])
AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
# We use a slightly smaller set of warning options for lib/.
# Remove the following and save the result in GNULIB_WARN_CFLAGS.
nw=
#nw="$nw -Wuninitialized"
nw="$nw -Wunused-macros"
#nw="$nw -Wmissing-prototypes"
nw="$nw -Wold-style-definition"
nw="$nw -Wcast-align"
nw="$nw -Wunsuffixed-float-constants"
gl_WARN_ADD([-Wno-format-nonliteral])
gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
AC_SUBST([GNULIB_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_STDC
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
case $host_os in
mingw*) suffix=w32 ;;
*) suffix=posix ;;
esac
AC_CONFIG_LINKS([lib/colorize.c:lib/colorize-$suffix.c])
AC_CONFIG_FILES([
Makefile
lib/Makefile
src/Makefile
tests/Makefile
po/Makefile.in
doc/Makefile
gnulib-tests/Makefile
])
GREP="$ac_abs_top_builddir/src/grep"
EGREP="$ac_abs_top_builddir/src/grep -E"
AC_OUTPUT
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