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# Configure template for gzip.
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# Copyright (C) 1999-2002, 2006-2007, 2009-2010 Free Software Foundation, Inc.
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# Copyright (C) 1992-1993 Jean-loup Gailly
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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AC_CONFIG_SRCDIR(gzip.c)
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AC_CONFIG_AUX_DIR(build-aux)
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AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
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AM_INIT_AUTOMAKE([1.11 dist-xz color-tests parallel-tests])
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AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
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AC_CHECK_TOOL([NM], [nm], [nm])
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AC_ARG_ENABLE([gcc-warnings],
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[AS_HELP_STRING([--enable-gcc-warnings],
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[turn on lots of GCC warnings (for developers)])],
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*) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
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gl_gcc_warnings=$enableval],
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if test "$gl_gcc_warnings" = yes; then
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gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
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AC_SUBST([WERROR_CFLAGS])
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# This, $nw, is the list of warnings we disable.
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nw="$nw -Wdeclaration-after-statement" # too useful to forbid
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nw="$nw -Waggregate-return" # anachronistic
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nw="$nw -Wlong-long" # C90 is anachronistic (lib/gethrxtime.h)
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nw="$nw -Wc++-compat" # We don't care about C++ compilers
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nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib
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nw="$nw -Wtraditional" # Warns on #elif which we use often
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nw="$nw -Wcast-qual" # Too many warnings for now
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nw="$nw -Wconversion" # Too many warnings for now
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nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
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nw="$nw -Wsign-conversion" # Too many warnings for now
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nw="$nw -Wtraditional-conversion" # Too many warnings for now
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nw="$nw -Wunreachable-code" # Too many warnings for now
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nw="$nw -Wpadded" # Our structs are not padded
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nw="$nw -Wredundant-decls" # openat.h declares e.g., mkdirat
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nw="$nw -Wlogical-op" # any use of fwrite provokes this
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nw="$nw -Wformat-nonliteral" # who.c and pinky.c strftime uses
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nw="$nw -Wvla" # warnings in gettext.h
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nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
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nw="$nw -Wswitch-enum" # Too many warnings for now
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nw="$nw -Wswitch-default" # Too many warnings for now
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nw="$nw -Wstack-protector" # not worth working around
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# things I might fix soon:
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nw="$nw -Wfloat-equal" # sort.c, seq.c
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nw="$nw -Wmissing-format-attribute" # copy.c
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nw="$nw -Wunsafe-loop-optimizations" # a few src/*.c
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nw="$nw -Winline" # system.h's readdir_ignoring_dot_and_dotdot
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nw="$nw -Wstrict-overflow" # expr.c, pr.c, tr.c, factor.c
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# initial problems in gzip
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nw="$nw -Wold-style-definition"
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nw="$nw -Wunused-macros"
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# ?? -Wstrict-overflow
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gl_MANYWARN_ALL_GCC([ws])
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gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
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gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
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gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now
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gl_WARN_ADD([-Wno-pointer-sign]) # Too many warnings for now
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gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
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gl_WARN_ADD([-Wno-overflow]) # util.c
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gl_WARN_ADD([-Wno-type-limits]) # util.c
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# In spite of excluding -Wlogical-op above, it is enabled, as of
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# gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
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gl_WARN_ADD([-Wno-logical-op])
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gl_WARN_ADD([-fdiagnostics-show-option])
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gl_WARN_ADD([-funit-at-a-time])
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AC_SUBST([WARN_CFLAGS])
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AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
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AC_DEFINE([_FORTIFY_SOURCE], [2],
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[enable compile-time and run-time bounds-checking, and some warnings])
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AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
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# We use a slightly smaller set of warning options for lib/.
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# Remove the following and save the result in GNULIB_WARN_CFLAGS.
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nw="$nw -Wuninitialized"
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nw="$nw -Wmissing-prototypes"
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nw="$nw -Wold-style-definition"
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gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
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AC_SUBST([GNULIB_WARN_CFLAGS])
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# cc -E produces incorrect asm files on SVR4, so postprocess it.
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ASCPPPOST="sed '/^ *#/d; s,//.*,,; s/% /%/g; s/\\. /./g'"
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AC_SUBST([ASCPPPOST])
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AC_CACHE_CHECK([for underline in external names], [gzip_cv_underline],
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[gzip_cv_underline=yes
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AC_TRY_COMPILE([int foo() {return 0;}], [],
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[$NM conftest.$OBJEXT | grep _foo >/dev/null 2>&1 ||
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gzip_cv_underline=no])])
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if test $gzip_cv_underline = no; then
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ASCPPFLAGS='-DNO_UNDERLINE'
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AC_SUBST([ASCPPFLAGS])
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# Try to assemble match.S.
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# "gcc -E match.s" ignores -E, so we must use _match.S.
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AC_CACHE_CHECK([for an assembler syntax supported by this package],
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[gzip_cv_assembler=no
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if cp $srcdir/lib/match.c _match.S &&
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eval "$CPP $CPPFLAGS $ASCPPFLAGS _match.S > _match.i" 2>/dev/null &&
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eval "$ASCPPPOST < _match.i > match_.s" 2>/dev/null; then
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if test ! -s match_.s || grep error < match_.s > /dev/null; then
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elif eval "$CC $CPPFLAGS $CFLAGS -c match_.s >/dev/null 2>&1" &&
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test -f match_.$OBJEXT; then
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gzip_cv_assembler=yes
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if echo 'void foo (void) {}' > conftest.c &&
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eval "$CC $CPPFLAGS $CFLAGS -S conftest.c >/dev/null 2>&1" &&
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grep '\.note\.GNU-stack' conftest.s >/dev/null 2>&1 &&
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eval "$CC $CPPFLAGS $CFLAGS -c -Wa,--noexecstack match_.s >/dev/null 2>&1" &&
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test -f match_.$OBJEXT; then
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gzip_cv_assembler='yes, with -Wa,--noexecstack'
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rm -f conftest* _match.i _match.S match_.s match_.$OBJEXT;;
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if test "$gzip_cv_assembler" != no; then
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[Define if an assembler version of longest_match is available.])
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if test "$gzip_cv_assembler" = 'yes, with -Wa,--noexecstack'; then
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ASFLAGS_config='-Wa,--noexecstack'
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AC_SUBST([ASFLAGS_config])
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AC_CHECK_HEADERS_ONCE(fcntl.h limits.h memory.h time.h)
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AC_CHECK_FUNCS_ONCE([chown fchmod fchown lstat siginterrupt])
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AC_CONFIG_FILES([Makefile doc/Makefile lib/Makefile])
added
removed
.pc/getdtablesize-missing.diff/configure.ac
