1 # Configure template for GNU Diffutils.
3 # Copyright (C) 1994-1995, 1998, 2001-2002, 2004, 2006, 2009-2013 Free Software
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 AC_INIT([GNU diffutils],
22 m4_esyscmd([build-aux/git-version-gen .tarball-version]),
23 [bug-diffutils@gnu.org])
25 AC_CONFIG_SRCDIR([src/diff.c])
26 AC_CONFIG_AUX_DIR([build-aux])
27 AC_CONFIG_MACRO_DIR([m4])
29 AM_INIT_AUTOMAKE([1.11 dist-xz no-dist-gzip color-tests parallel-tests])
30 AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
32 AC_CONFIG_HEADER([lib/config.h:lib/config.hin])
36 AM_MISSING_PROG([HELP2MAN], [help2man])
39 gl_USE_SYSTEM_EXTENSIONS
42 AC_ARG_ENABLE([gcc-warnings],
43 [AS_HELP_STRING([--enable-gcc-warnings],
44 [turn on lots of GCC warnings (for developers)])],
47 *) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
49 gl_gcc_warnings=$enableval],
50 [if test -d "$srcdir"/.git; then
57 if test "$gl_gcc_warnings" = yes; then
58 gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
59 AC_SUBST([WERROR_CFLAGS])
62 # This, $nw, is the list of warnings we disable.
63 nw="$nw -Wdeclaration-after-statement" # too useful to forbid
64 nw="$nw -Waggregate-return" # anachronistic
65 nw="$nw -Wlong-long" # C90 is anachronistic (lib/gethrxtime.h)
66 nw="$nw -Wc++-compat" # We don't care about C++ compilers
67 nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib
68 nw="$nw -Wtraditional" # Warns on #elif which we use often
69 nw="$nw -Wcast-qual" # Too many warnings for now
70 nw="$nw -Wconversion" # Too many warnings for now
71 nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
72 nw="$nw -Wsign-conversion" # Too many warnings for now
73 nw="$nw -Wtraditional-conversion" # Too many warnings for now
74 nw="$nw -Wunreachable-code" # Too many warnings for now
75 nw="$nw -Wpadded" # Our structs are not padded
76 nw="$nw -Wredundant-decls" # openat.h declares e.g., mkdirat
77 nw="$nw -Wlogical-op" # any use of fwrite provokes this
78 nw="$nw -Wformat-nonliteral" # who.c and pinky.c strftime uses
79 nw="$nw -Wvla" # warnings in gettext.h
80 nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
81 nw="$nw -Wswitch-enum" # Too many warnings for now
82 nw="$nw -Wswitch-default" # Too many warnings for now
83 nw="$nw -Wstack-protector" # not worth working around
84 # things I might fix soon:
85 nw="$nw -Wfloat-equal" # sort.c, seq.c
86 nw="$nw -Wmissing-format-attribute" # copy.c
87 nw="$nw -Wunsafe-loop-optimizations" # a few src/*.c
88 nw="$nw -Winline" # system.h's readdir_ignoring_dot_and_dotdot
89 nw="$nw -Wstrict-overflow" # expr.c, pr.c, tr.c, factor.c
90 nw="$nw -Wformat-extra-args" # sdiff.c
91 # ?? -Wstrict-overflow
93 gl_MANYWARN_ALL_GCC([ws])
94 gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
98 gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
99 gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now
100 gl_WARN_ADD([-Wno-pointer-sign]) # Too many warnings for now
101 gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
102 gl_WARN_ADD([-Wno-format-nonliteral])
104 # In spite of excluding -Wlogical-op above, it is enabled, as of
105 # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
106 gl_WARN_ADD([-Wno-logical-op])
108 gl_WARN_ADD([-fdiagnostics-show-option])
109 gl_WARN_ADD([-funit-at-a-time])
111 AC_SUBST([WARN_CFLAGS])
113 AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
114 AC_DEFINE([_FORTIFY_SOURCE], [2],
115 [enable compile-time and run-time bounds-checking, and some warnings])
116 AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
118 # We use a slightly smaller set of warning options for lib/.
119 # Remove the following and save the result in GNULIB_WARN_CFLAGS.
121 nw="$nw -Wunused-macros"
122 nw="$nw -Wmissing-prototypes"
123 nw="$nw -Wold-style-definition"
124 gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
125 AC_SUBST([GNULIB_WARN_CFLAGS])
131 AC_DEFINE([DEFAULT_EDITOR_PROGRAM], ["ed"],
132 [Name of editor program, unless overridden.])
134 AC_PATH_PROG([PR_PROGRAM], [pr], [""])
135 AC_DEFINE_UNQUOTED([PR_PROGRAM], ["$PR_PROGRAM"], [Name of "pr" program.])
137 AC_CHECK_MEMBERS([struct stat.st_blksize])
138 AC_CHECK_MEMBERS([struct stat.st_rdev])
143 AC_CHECK_FUNCS_ONCE([sigaction sigprocmask strcasecoll stricoll])
144 if test $ac_cv_func_sigprocmask = no; then
145 AC_CHECK_FUNCS([sigblock])
147 AC_FUNC_CLOSEDIR_VOID
150 # When .tarball-version exists, we're building from a tarball
151 # and must not make man/*.1 files depend on the generated src/version.c,
152 # because that would induce a requirement to run the help2man perl script.
153 # We are not yet prepared to make perl a build-from-tarball requirement.
154 # Hence, here we detect .tarball-version existence. When not present,
155 # we define a variable to be used in man/Makefile.am to induce the
156 # proper dependency (so that man/*.1 will be rebuilt upon any version change),
157 # but not when built from a tarball.
158 AC_SUBST([SRC_VERSION_C])
159 test -f $srcdir/.tarball-version \
161 || SRC_VERSION_C=../src/version.c
163 AM_GNU_GETTEXT([external], [need-ngettext])
164 AM_GNU_GETTEXT_VERSION([0.18.2])
165 XGETTEXT="AWK='$AWK' \$(SHELL) \$(top_srcdir)/exgettext $XGETTEXT"
168 Makefile doc/Makefile
172 gnulib-tests/Makefile