# Configure template for GNU Diffutils. # Copyright (C) 1994-1995, 1998, 2001-2002, 2004, 2006, 2009-2013, 2015-2016 # Free Software Foundation, Inc. # 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 . AC_PREREQ(2.61) AC_INIT([GNU diffutils], m4_esyscmd([build-aux/git-version-gen .tarball-version]), [bug-diffutils@gnu.org]) AC_CONFIG_SRCDIR([src/diff.c]) AC_CONFIG_AUX_DIR([build-aux]) AC_CONFIG_MACRO_DIR([m4]) AM_INIT_AUTOMAKE([1.11 dist-xz no-dist-gzip subdir-objects color-tests parallel-tests]) AM_SILENT_RULES([yes]) # make --enable-silent-rules the default. AC_CONFIG_HEADER([lib/config.h:lib/config.hin]) AC_PROG_AWK AC_PROG_CC AM_PROG_CC_C_O AM_MISSING_PROG([HELP2MAN], [help2man]) AC_PROG_RANLIB gl_EARLY gl_USE_SYSTEM_EXTENSIONS 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="$nw -Wstrict-overflow" # expr.c, pr.c, tr.c, factor.c nw="$nw -Wformat-extra-args" # sdiff.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-pointer-sign]) # Too many warnings for now gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now gl_WARN_ADD([-Wno-format-nonliteral]) # 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]) gl_WARN_ADD([-fdiagnostics-show-option]) gl_WARN_ADD([-funit-at-a-time]) gl_WARN_ADD([-fno-common]) AC_SUBST([WARN_CFLAGS]) AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.]) AC_DEFINE([_FORTIFY_SOURCE], [2], [enable compile-time and run-time bounds-checking, and some warnings]) 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="$nw -Wunused-macros" nw="$nw -Wmissing-prototypes" nw="$nw -Wold-style-definition" nw="$nw -Wsuggest-attribute=pure" gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw]) AC_SUBST([GNULIB_WARN_CFLAGS]) fi AC_C_INLINE AC_C_VARARRAYS AC_DEFINE([DEFAULT_EDITOR_PROGRAM], ["ed"], [Name of editor program, unless overridden.]) AC_PATH_PROG([PR_PROGRAM], [pr], [""]) AC_DEFINE_UNQUOTED([PR_PROGRAM], ["$PR_PROGRAM"], [Name of "pr" program.]) AC_CHECK_MEMBERS([struct stat.st_blksize]) AC_CHECK_MEMBERS([struct stat.st_rdev]) AC_HEADER_DIRENT AC_HEADER_SYS_WAIT AC_TYPE_PID_T AC_CHECK_FUNCS_ONCE([sigaction sigprocmask strcasecoll stricoll]) if test $ac_cv_func_sigprocmask = no; then AC_CHECK_FUNCS([sigblock]) fi AC_FUNC_CLOSEDIR_VOID AC_FUNC_FORK # When .tarball-version exists, we're building from a tarball # and must not make man/*.1 files depend on the generated src/version.c, # because that would induce a requirement to run the help2man perl script. # We are not yet prepared to make perl a build-from-tarball requirement. # Hence, here we detect .tarball-version existence. When not present, # we define a variable to be used in man/Makefile.am to induce the # proper dependency (so that man/*.1 will be rebuilt upon any version change), # but not when built from a tarball. AC_SUBST([SRC_VERSION_C]) test -f $srcdir/.tarball-version \ && SRC_VERSION_C= \ || SRC_VERSION_C=../src/version.c AM_GNU_GETTEXT([external], [need-ngettext]) AM_GNU_GETTEXT_VERSION([0.19.2]) XGETTEXT="AWK='$AWK' \$(SHELL) \$(top_srcdir)/exgettext $XGETTEXT" AC_CONFIG_FILES([ Makefile doc/Makefile lib/Makefile src/Makefile tests/Makefile gnulib-tests/Makefile man/Makefile po/Makefile.in ]) AC_OUTPUT