# Configure template for gzip.
-# Copyright (C) 1999-2002, 2006-2007, 2009 Free Software Foundation, Inc.
+# Copyright (C) 1999-2002, 2006-2007, 2009-2018 Free Software Foundation, Inc.
# Copyright (C) 1992-1993 Jean-loup Gailly
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
-AC_PREREQ([2.60])
+AC_PREREQ([2.63])
AC_INIT([gzip],
- m4_esyscmd([build-aux/git-version-gen .tarball-version]),
- [bug-gzip@gnu.org])
+ m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+ [bug-gzip@gnu.org])
-AC_CONFIG_SRCDIR(gzip.c)
-AC_CONFIG_AUX_DIR(build-aux)
+AC_CONFIG_SRCDIR([gzip.c])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
-AM_INIT_AUTOMAKE([1.11 dist-xz color-tests parallel-tests])
+AM_INIT_AUTOMAKE([1.11 subdir-objects dist-xz dist-zip
+ color-tests parallel-tests])
AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
+dnl POSIXCHECK is worthwhile for maintainers, but adds several seconds
+dnl (more than 10% execution time) to ./configure, with no benefit for
+dnl most users. Using it to look for bugs requires:
+dnl GNULIB_POSIXCHECK=1 autoreconf -f
+dnl ./configure
+dnl make
+dnl make -C src clean
+dnl make CFLAGS=-DGNULIB_POSIXCHECK=1
+dnl FIXME: Once we figure out how to avoid false positives, we should
+dnl have 'make my-distcheck' in dist-check.mk exercise this.
+m4_syscmd([test "${GNULIB_POSIXCHECK+set}" = set])
+m4_if(m4_sysval, [0], [], [dnl
+gl_ASSERT_NO_GNULIB_POSIXCHECK])
+
AC_PROG_CC_STDC
AM_PROG_CC_C_O
AC_PROG_CPP
+AC_PROG_GREP
AC_CHECK_TOOL([NM], [nm], [nm])
AC_PROG_LN_S
AC_PROG_RANLIB
AC_PROG_SHELL
gl_EARLY
-AC_SYS_LARGEFILE
gl_INIT
+AC_ARG_ENABLE([gcc-warnings],
+ [AS_HELP_STRING([--enable-gcc-warnings],
+ [turn on many GCC warnings (for developers; best with GNU make)])],
+ [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]
+)
+
+# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
+# ------------------------------------------------
+# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
+# Otherwise, run RUN-IF-NOT-FOUND.
+AC_DEFUN([gl_GCC_VERSION_IFELSE],
+ [AC_PREPROC_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
+/* ok */
+#else
+# error "your version of gcc is older than $1.$2"
+#endif
+ ]]),
+ ], [$3], [$4])
+ ]
+)
+
+if test "$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 -Wduplicated-branches" # Too many false alarms
+ 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 -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
+
+ # Warnings that gzip runs afoul of but coreutils does not.
+ nw="$nw -Wold-style-definition"
+ nw="$nw -Wshadow"
+ nw="$nw -Wstrict-overflow"
+
+ # Using -Wstrict-overflow is a pain, but the alternative is worse.
+ # For an example, see the code that provoked this report:
+ # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33498
+ # Code like that still infloops with gcc-4.6.0 and -O2. Scary indeed.
+
+ gl_MANYWARN_ALL_GCC([ws])
+ gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
+ for w in $ws; do
+ gl_WARN_ADD([$w])
+ done
+ gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now
+ gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
+ gl_WARN_ADD([-Wsuggest-attribute=const])
+ gl_WARN_ADD([-Wsuggest-attribute=noreturn])
+ gl_WARN_ADD([-Wno-format-nonliteral])
+
+ # Enable this warning only with gcc-4.7 and newer. With 4.6.2 20111027,
+ # it suggests test.c's advance function may be pure, even though it
+ # increments a global variable. Oops.
+ # Normally we'd write code to test for the precise failure, but that
+ # requires a relatively large input to make gcc exhibit the failure.
+ gl_GCC_VERSION_IFELSE([4], [7], [gl_WARN_ADD([-Wsuggest-attribute=pure])])
+
+ # 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])
+
+ 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="$nw -Wstrict-overflow"
+ nw="$nw -Wformat-truncation=2"
+ nw="$nw -Wuninitialized"
+ nw="$nw -Wunused-macros"
+ nw="$nw -Wmissing-prototypes"
+ nw="$nw -Wold-style-definition"
+ gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
+ AC_SUBST([GNULIB_WARN_CFLAGS])
+fi
+
# cc -E produces incorrect asm files on SVR4, so postprocess it.
-ASCPPPOST="sed '/^ *#/d; s,//.*,,; s/% /%/g; s/\\. /./g'"
+ASCPPPOST="sed '/^ *\\#/d; s,//.*,,; s/% /%/g; s/\\. /./g'"
AC_SUBST([ASCPPPOST])
AC_CACHE_CHECK([for underline in external names], [gzip_cv_underline],
[gzip_cv_underline=yes
AC_TRY_COMPILE([int foo() {return 0;}], [],
[$NM conftest.$OBJEXT | grep _foo >/dev/null 2>&1 ||
- gzip_cv_underline=no])])
+ gzip_cv_underline=no])])
ASCPPFLAGS=
if test $gzip_cv_underline = no; then
ASCPPFLAGS='-DNO_UNDERLINE'
AC_CACHE_CHECK([for an assembler syntax supported by this package],
[gzip_cv_assembler],
[gzip_cv_assembler=no
- case " $DEFS " in
- *' NO_ASM '*) ;;
+ case $DEFS in
+ *NO_ASM*) ;;
*)
if cp $srcdir/lib/match.c _match.S &&
- eval "$CPP $CPPFLAGS $ASCPPFLAGS _match.S > _match.i" 2>/dev/null &&
- eval "$ASCPPPOST < _match.i > match_.s" 2>/dev/null; then
+ eval "$CPP $CPPFLAGS $ASCPPFLAGS _match.S > _match.i" &&
+ eval "$ASCPPPOST < _match.i > match_.s"; then
if test ! -s match_.s || grep error < match_.s > /dev/null; then
- :
- elif eval "$CC $CPPFLAGS $CFLAGS -c match_.s >/dev/null 2>&1" &&
- test -f match_.$OBJEXT; then
- rm -f match_.$OBJEXT
- gzip_cv_assembler=yes
- if echo 'void foo (void) {}' > conftest.c &&
- eval "$CC $CPPFLAGS $CFLAGS -S conftest.c >/dev/null 2>&1" &&
- grep '\.note\.GNU-stack' conftest.s >/dev/null 2>&1 &&
- eval "$CC $CPPFLAGS $CFLAGS -c -Wa,--noexecstack match_.s >/dev/null 2>&1" &&
- test -f match_.$OBJEXT; then
- gzip_cv_assembler='yes, with -Wa,--noexecstack'
- fi
+ :
+ elif eval "$CC $CPPFLAGS $CFLAGS -c match_.s >/dev/null" &&
+ test -f match_.$OBJEXT; then
+ rm -f match_.$OBJEXT
+ gzip_cv_assembler=yes
+ if echo 'void foo (void) {}' > conftest.c &&
+ eval "$CC $CPPFLAGS $CFLAGS -S conftest.c >/dev/null" &&
+ grep '\.note\.GNU-stack' conftest.s >/dev/null &&
+ eval "$CC $CPPFLAGS $CFLAGS -c -Wa,--noexecstack match_.s >/dev/null" &&
+ test -f match_.$OBJEXT; then
+ gzip_cv_assembler='yes, with -Wa,--noexecstack'
+ fi
fi
fi
rm -f conftest* _match.i _match.S match_.s match_.$OBJEXT;;
esac])
if test "$gzip_cv_assembler" != no; then
- AC_DEFINE(ASMV, ,
+ AC_DEFINE([ASMV], ,
[Define if an assembler version of longest_match is available.])
AC_LIBOBJ(match)
fi
AC_C_CONST
AC_HEADER_STDC
AC_CHECK_HEADERS_ONCE(fcntl.h limits.h memory.h time.h)
-AC_CHECK_FUNCS_ONCE([chown fchmod fchown fdopendir lstat siginterrupt])
+AC_CHECK_FUNCS_ONCE([chown fchmod fchown lstat siginterrupt])
AC_HEADER_DIRENT
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_OFF_T
-AC_CONFIG_FILES([Makefile doc/Makefile lib/Makefile])
+AC_CONFIG_FILES([Makefile doc/Makefile lib/Makefile tests/Makefile])
AC_OUTPUT
projects / debian / gzip / blobdiff