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configure.ac
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# -*- Autoconf -*-
# SPDX-License-Identifier: 0BSD
###############################################################################
#
# Process this file with autoconf to produce a configure script.
#
# Author: Lasse Collin
#
###############################################################################
# NOTE: Don't add useless checks. autoscan detects this and that, but don't
# let it confuse you. For example, we don't care about checking for behavior
# of malloc(), stat(), or lstat(), since we don't use those functions in
# a way that would cause the problems the autoconf macros check.
AC_PREREQ([2.69])
AC_INIT([XZ Utils], m4_esyscmd([/bin/sh build-aux/version.sh]),
[[email protected]], [xz], [https://xz.tukaani.org/xz-utils/])
AC_CONFIG_SRCDIR([src/liblzma/common/common.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([config.h])
echo
echo "$PACKAGE_STRING"
echo
echo "System type:"
# This is needed to know if assembler optimizations can be used.
AC_CANONICAL_HOST
# We do some special things on Windows (32-bit or 64-bit) builds.
case $host_os in
mingw* | cygwin | msys) is_w32=yes ;;
*) is_w32=no ;;
esac
AM_CONDITIONAL([COND_W32], [test "$is_w32" = yes])
# We need to use $EXEEXT with $(LN_S) when creating symlinks to
# executables. Cygwin is an exception to this, since it is recommended
# that symlinks don't have the .exe suffix. To make this work, we
# define LN_EXEEXT.
#
# MSYS2 is treated the same way as Cygwin. It uses plain "msys" like
# the original MSYS when building MSYS/MSYS2-binaries. Hopefully this
# doesn't break things for the original MSYS developers. Note that this
# doesn't affect normal MSYS/MSYS2 users building non-MSYS/MSYS2 binaries
# since in that case the $host_os is usually mingw32.
case $host_os in
cygwin | msys) LN_EXEEXT= ;;
*) LN_EXEEXT='$(EXEEXT)' ;;
esac
AC_SUBST([LN_EXEEXT])
echo
echo "Configure options:"
AM_CFLAGS=
#############
# Debugging #
#############
AC_MSG_CHECKING([if debugging code should be compiled])
AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [Enable debugging code.]),
[], enable_debug=no)
if test "x$enable_debug" = xyes; then
AC_MSG_RESULT([yes])
else
AC_DEFINE([NDEBUG], [1], [Define to 1 to disable debugging code.])
AC_MSG_RESULT([no])
fi
###########
# Filters #
###########
m4_define([SUPPORTED_FILTERS], [lzma1,lzma2,delta,x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv])dnl
m4_define([SIMPLE_FILTERS], [x86,powerpc,ia64,arm,armthumb,arm64,sparc,riscv])
m4_define([LZ_FILTERS], [lzma1,lzma2])
m4_foreach([NAME], [SUPPORTED_FILTERS],
[enable_filter_[]NAME=no
enable_encoder_[]NAME=no
enable_decoder_[]NAME=no
])dnl
AC_MSG_CHECKING([which encoders to build])
AC_ARG_ENABLE([encoders], AS_HELP_STRING([--enable-encoders=LIST],
[Comma-separated list of encoders to build. Default=all.
Available encoders:]
m4_translit(m4_defn([SUPPORTED_FILTERS]), [,], [ ])),
[], [enable_encoders=SUPPORTED_FILTERS])
enable_encoders=`echo "$enable_encoders" | sed 's/,/ /g'`
if test "x$enable_encoders" = xno || test "x$enable_encoders" = x; then
enable_encoders=no
AC_MSG_RESULT([(none)])
else
for arg in $enable_encoders
do
case $arg in m4_foreach([NAME], [SUPPORTED_FILTERS], [
NAME)
enable_filter_[]NAME=yes
enable_encoder_[]NAME=yes
AC_DEFINE(HAVE_ENCODER_[]m4_toupper(NAME), [1],
[Define to 1 if] NAME [encoder is enabled.])
;;])
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([unknown filter: $arg])
;;
esac
done
AC_DEFINE([HAVE_ENCODERS], [1],
[Define to 1 if any of HAVE_ENCODER_foo have been defined.])
AC_MSG_RESULT([$enable_encoders])
fi
AC_MSG_CHECKING([which decoders to build])
AC_ARG_ENABLE([decoders], AS_HELP_STRING([--enable-decoders=LIST],
[Comma-separated list of decoders to build. Default=all.
Available decoders are the same as available encoders.]),
[], [enable_decoders=SUPPORTED_FILTERS])
enable_decoders=`echo "$enable_decoders" | sed 's/,/ /g'`
if test "x$enable_decoders" = xno || test "x$enable_decoders" = x; then
enable_decoders=no
AC_MSG_RESULT([(none)])
else
for arg in $enable_decoders
do
case $arg in m4_foreach([NAME], [SUPPORTED_FILTERS], [
NAME)
enable_filter_[]NAME=yes
enable_decoder_[]NAME=yes
AC_DEFINE(HAVE_DECODER_[]m4_toupper(NAME), [1],
[Define to 1 if] NAME [decoder is enabled.])
;;])
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([unknown filter: $arg])
;;
esac
done
AC_DEFINE([HAVE_DECODERS], [1],
[Define to 1 if any of HAVE_DECODER_foo have been defined.])
AC_MSG_RESULT([$enable_decoders])
fi
if test "x$enable_encoder_lzma2$enable_encoder_lzma1" = xyesno \
|| test "x$enable_decoder_lzma2$enable_decoder_lzma1" = xyesno; then
AC_MSG_ERROR([LZMA2 requires that LZMA1 is also enabled.])
fi
AM_CONDITIONAL(COND_MAIN_ENCODER, test "x$enable_encoders" != xno)
AM_CONDITIONAL(COND_MAIN_DECODER, test "x$enable_decoders" != xno)
m4_foreach([NAME], [SUPPORTED_FILTERS],
[AM_CONDITIONAL(COND_FILTER_[]m4_toupper(NAME), test "x$enable_filter_[]NAME" = xyes)
AM_CONDITIONAL(COND_ENCODER_[]m4_toupper(NAME), test "x$enable_encoder_[]NAME" = xyes)
AM_CONDITIONAL(COND_DECODER_[]m4_toupper(NAME), test "x$enable_decoder_[]NAME" = xyes)
])dnl
# The so called "simple filters" share common code.
enable_filter_simple=no
enable_encoder_simple=no
enable_decoder_simple=no
m4_foreach([NAME], [SIMPLE_FILTERS],
[test "x$enable_filter_[]NAME" = xyes && enable_filter_simple=yes
test "x$enable_encoder_[]NAME" = xyes && enable_encoder_simple=yes
test "x$enable_decoder_[]NAME" = xyes && enable_decoder_simple=yes
])dnl
AM_CONDITIONAL(COND_FILTER_SIMPLE, test "x$enable_filter_simple" = xyes)
AM_CONDITIONAL(COND_ENCODER_SIMPLE, test "x$enable_encoder_simple" = xyes)
AM_CONDITIONAL(COND_DECODER_SIMPLE, test "x$enable_decoder_simple" = xyes)
# LZ-based filters share common code.
enable_filter_lz=no
enable_encoder_lz=no
enable_decoder_lz=no
m4_foreach([NAME], [LZ_FILTERS],
[test "x$enable_filter_[]NAME" = xyes && enable_filter_lz=yes
test "x$enable_encoder_[]NAME" = xyes && enable_encoder_lz=yes
test "x$enable_decoder_[]NAME" = xyes && enable_decoder_lz=yes
])dnl
AM_CONDITIONAL(COND_FILTER_LZ, test "x$enable_filter_lz" = xyes)
AM_CONDITIONAL(COND_ENCODER_LZ, test "x$enable_encoder_lz" = xyes)
AM_CONDITIONAL(COND_DECODER_LZ, test "x$enable_decoder_lz" = xyes)
#################
# Match finders #
#################
m4_define([SUPPORTED_MATCH_FINDERS], [hc3,hc4,bt2,bt3,bt4])
m4_foreach([NAME], [SUPPORTED_MATCH_FINDERS],
[enable_match_finder_[]NAME=no
])
AC_MSG_CHECKING([which match finders to build])
AC_ARG_ENABLE([match-finders], AS_HELP_STRING([--enable-match-finders=LIST],
[Comma-separated list of match finders to build. Default=all.
At least one match finder is required for encoding with
the LZMA1 and LZMA2 filters. Available match finders:]
m4_translit(m4_defn([SUPPORTED_MATCH_FINDERS]), [,], [ ])), [],
[enable_match_finders=SUPPORTED_MATCH_FINDERS])
enable_match_finders=`echo "$enable_match_finders" | sed 's/,/ /g'`
if test "x$enable_encoder_lz" = xyes ; then
if test -z "$enable_match_finders"; then
AC_MSG_ERROR([At least one match finder is required for an LZ-based encoder.])
fi
for arg in $enable_match_finders
do
case $arg in m4_foreach([NAME], [SUPPORTED_MATCH_FINDERS], [
NAME)
enable_match_finder_[]NAME=yes
AC_DEFINE(HAVE_MF_[]m4_toupper(NAME), [1],
[Define to 1 to enable] NAME [match finder.])
;;])
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([unknown match finder: $arg])
;;
esac
done
AC_MSG_RESULT([$enable_match_finders])
else
AC_MSG_RESULT([(none because not building any LZ-based encoder)])
fi
####################
# Integrity checks #
####################
m4_define([SUPPORTED_CHECKS], [crc32,crc64,sha256])
m4_foreach([NAME], [SUPPORTED_CHECKS],
[enable_check_[]NAME=no
])dnl
AC_MSG_CHECKING([which integrity checks to build])
AC_ARG_ENABLE([checks], AS_HELP_STRING([--enable-checks=LIST],
[Comma-separated list of integrity checks to build.
Default=all. Available integrity checks:]
m4_translit(m4_defn([SUPPORTED_CHECKS]), [,], [ ])),
[], [enable_checks=SUPPORTED_CHECKS])
enable_checks=`echo "$enable_checks" | sed 's/,/ /g'`
if test "x$enable_checks" = xno || test "x$enable_checks" = x; then
AC_MSG_RESULT([(none)])
else
for arg in $enable_checks
do
case $arg in m4_foreach([NAME], [SUPPORTED_CHECKS], [
NAME)
enable_check_[]NAME=yes
AC_DEFINE(HAVE_CHECK_[]m4_toupper(NAME), [1],
[Define to 1 if] NAME
[integrity check is enabled.])
;;])
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([unknown integrity check: $arg])
;;
esac
done
AC_MSG_RESULT([$enable_checks])
fi
if test "x$enable_check_crc32" = xno ; then
AC_MSG_ERROR([For now, the CRC32 check must always be enabled.])
fi
m4_foreach([NAME], [SUPPORTED_CHECKS],
[AM_CONDITIONAL(COND_CHECK_[]m4_toupper(NAME), test "x$enable_check_[]NAME" = xyes)
])dnl
AC_MSG_CHECKING([if external SHA-256 should be used])
AC_ARG_ENABLE([external-sha256], AS_HELP_STRING([--enable-external-sha256],
[Use SHA-256 code from the operating system.
See INSTALL for possible subtle problems.]),
[], [enable_external_sha256=no])
if test "x$enable_check_sha256" != "xyes"; then
enable_external_sha256=no
fi
if test "x$enable_external_sha256" = xyes; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
#############
# MicroLZMA #
#############
AC_MSG_CHECKING([if MicroLZMA support should be built])
AC_ARG_ENABLE([microlzma], AS_HELP_STRING([--disable-microlzma],
[Do not build MicroLZMA encoder and decoder.
It is needed by specific applications only,
for example, erofs-utils.]),
[], [enable_microlzma=yes])
case $enable_microlzma in
yes | no)
AC_MSG_RESULT([$enable_microlzma])
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-microlzma accepts only 'yes' or 'no'.])
;;
esac
AM_CONDITIONAL(COND_MICROLZMA, test "x$enable_microlzma" = xyes)
#############################
# .lz (lzip) format support #
#############################
AC_MSG_CHECKING([if .lz (lzip) decompression support should be built])
AC_ARG_ENABLE([lzip-decoder], AS_HELP_STRING([--disable-lzip-decoder],
[Disable decompression support for .lz (lzip) files.]),
[], [enable_lzip_decoder=yes])
if test "x$enable_decoder_lzma1" != xyes; then
enable_lzip_decoder=no
AC_MSG_RESULT([no because LZMA1 decoder is disabled])
elif test "x$enable_lzip_decoder" = xyes; then
AC_DEFINE([HAVE_LZIP_DECODER], [1],
[Define to 1 if .lz (lzip) decompression support is enabled.])
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
AM_CONDITIONAL(COND_LZIP_DECODER, test "x$enable_lzip_decoder" = xyes)
###########################
# Assembler optimizations #
###########################
AC_MSG_CHECKING([if assembler optimizations should be used])
AC_ARG_ENABLE([assembler], AS_HELP_STRING([--disable-assembler],
[Do not use assembler optimizations even if such exist
for the architecture.]),
[], [enable_assembler=yes])
if test "x$enable_assembler" = xyes; then
enable_assembler=no
case $host_os in
# Darwin should work too but only if not creating universal
# binaries. Solaris x86 could work too but I cannot test.
linux* | *bsd* | mingw* | cygwin | msys | *djgpp*)
case $host_cpu in
i?86) enable_assembler=x86 ;;
esac
;;
esac
fi
case $enable_assembler in
x86 | no)
AC_MSG_RESULT([$enable_assembler])
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-assembler accepts only 'yes', 'no', or 'x86' (32-bit).])
;;
esac
AM_CONDITIONAL(COND_ASM_X86, test "x$enable_assembler" = xx86)
#############
# CLMUL CRC #
#############
AC_ARG_ENABLE([clmul-crc], AS_HELP_STRING([--disable-clmul-crc],
[Do not use carryless multiplication for CRC calculation
even if support for it is detected.]),
[], [enable_clmul_crc=yes])
############################
# ARM64 CRC32 Instructions #
############################
AC_ARG_ENABLE([arm64-crc32], AS_HELP_STRING([--disable-arm64-crc32],
[Do not use ARM64 CRC32 instructions even if support for it
is detected.]),
[], [enable_arm64_crc32=yes])
#####################
# Size optimization #
#####################
AC_MSG_CHECKING([if small size is preferred over speed])
AC_ARG_ENABLE([small], AS_HELP_STRING([--enable-small],
[Make liblzma smaller and a little slower.
This is disabled by default to optimize for speed.]),
[], [enable_small=no])
if test "x$enable_small" = xyes; then
AC_DEFINE([HAVE_SMALL], [1], [Define to 1 if optimizing for size.])
elif test "x$enable_small" != xno; then
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-small accepts only 'yes' or 'no'])
fi
AC_MSG_RESULT([$enable_small])
AM_CONDITIONAL(COND_SMALL, test "x$enable_small" = xyes)
#############
# Threading #
#############
AC_MSG_CHECKING([if threading support is wanted])
AC_ARG_ENABLE([threads], AS_HELP_STRING([--enable-threads=METHOD],
[Supported METHODS are 'yes', 'no', 'posix', 'win95', and
'vista'. The default is 'yes'. Using 'no' together with
--enable-small makes liblzma thread unsafe.]),
[], [enable_threads=yes])
if test "x$enable_threads" = xyes; then
case $host_os in
mingw*)
case $host_cpu in
i?86) enable_threads=win95 ;;
*) enable_threads=vista ;;
esac
;;
*)
enable_threads=posix
;;
esac
fi
case $enable_threads in
posix | win95 | vista)
AC_MSG_RESULT([yes, $enable_threads])
;;
no)
AC_MSG_RESULT([no])
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-threads only accepts 'yes', 'no', 'posix', 'win95', or 'vista'])
;;
esac
# We use the actual result a little later.
#########################
# Assumed amount of RAM #
#########################
# We use 128 MiB as default, because it will allow decompressing files
# created with "xz -9". It would be slightly safer to guess a lower value,
# but most systems, on which we don't have any way to determine the amount
# of RAM, will probably have at least 128 MiB of RAM.
AC_MSG_CHECKING([how much RAM to assume if the real amount is unknown])
AC_ARG_ENABLE([assume-ram], AS_HELP_STRING([--enable-assume-ram=SIZE],
[If and only if the real amount of RAM cannot be determined,
assume SIZE MiB. The default is 128 MiB. This affects the
default memory usage limit.]),
[], [enable_assume_ram=128])
assume_ram_check=`echo "$enable_assume_ram" | tr -d 0123456789`
if test -z "$enable_assume_ram" || test -n "$assume_ram_check"; then
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-assume-ram accepts only an integer argument])
fi
AC_MSG_RESULT([$enable_assume_ram MiB])
AC_DEFINE_UNQUOTED([ASSUME_RAM], [$enable_assume_ram],
[How many MiB of RAM to assume if the real amount cannot
be determined.])
#########################
# Components to install #
#########################
AC_ARG_ENABLE([xz], [AS_HELP_STRING([--disable-xz],
[do not build the xz tool])],
[], [enable_xz=yes])
AM_CONDITIONAL([COND_XZ], [test x$enable_xz != xno])
AC_ARG_ENABLE([xzdec], [AS_HELP_STRING([--disable-xzdec],
[do not build xzdec])],
[], [enable_xzdec=yes])
test "x$enable_decoders" = xno && enable_xzdec=no
AM_CONDITIONAL([COND_XZDEC], [test x$enable_xzdec != xno])
AC_ARG_ENABLE([lzmadec], [AS_HELP_STRING([--disable-lzmadec],
[do not build lzmadec
(it exists primarily for LZMA Utils compatibility)])],
[], [enable_lzmadec=yes])
test "x$enable_decoder_lzma1" = xno && enable_lzmadec=no
AM_CONDITIONAL([COND_LZMADEC], [test x$enable_lzmadec != xno])
AC_ARG_ENABLE([lzmainfo], [AS_HELP_STRING([--disable-lzmainfo],
[do not build lzmainfo
(it exists primarily for LZMA Utils compatibility)])],
[], [enable_lzmainfo=yes])
test "x$enable_decoder_lzma1" = xno && enable_lzmainfo=no
AM_CONDITIONAL([COND_LZMAINFO], [test x$enable_lzmainfo != xno])
AC_ARG_ENABLE([lzma-links], [AS_HELP_STRING([--disable-lzma-links],
[do not create symlinks for LZMA Utils compatibility])],
[], [enable_lzma_links=yes])
AM_CONDITIONAL([COND_LZMALINKS], [test x$enable_lzma_links != xno])
AC_ARG_ENABLE([scripts], [AS_HELP_STRING([--disable-scripts],
[do not install the scripts xzdiff, xzgrep, xzless, xzmore,
and their symlinks])],
[], [enable_scripts=yes])
AM_CONDITIONAL([COND_SCRIPTS], [test x$enable_scripts != xno])
AC_ARG_ENABLE([doc], [AS_HELP_STRING([--disable-doc],
[do not install documentation files to docdir
(man pages will still be installed)])],
[], [enable_doc=yes])
AM_CONDITIONAL([COND_DOC], [test x$enable_doc != xno])
##############
# Sandboxing #
##############
AC_MSG_CHECKING([if sandboxing should be used])
AC_ARG_ENABLE([sandbox], [AS_HELP_STRING([--enable-sandbox=METHOD],
[Sandboxing METHOD can be
'auto', 'no', 'capsicum', 'pledge', or 'landlock'.
The default is 'auto' which enables sandboxing if
a supported sandboxing method is found.])],
[], [enable_sandbox=auto])
case $enable_xzdec-$enable_xz-$enable_sandbox in
no-no-*)
enable_sandbox=no
AC_MSG_RESULT([no, --disable-xz and --disable-xzdec was used])
;;
*-*-auto)
AC_MSG_RESULT([maybe (autodetect)])
;;
*-*-no | *-*-capsicum | *-*-pledge | *-*-landlock)
AC_MSG_RESULT([$enable_sandbox])
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([--enable-sandbox only accepts 'auto', 'no', 'capsicum', 'pledge', or 'landlock'.])
;;
esac
###########################
# PATH prefix for scripts #
###########################
# The scripts can add a prefix to the search PATH so that POSIX tools
# or the xz binary is always in the PATH.
AC_ARG_ENABLE([path-for-scripts],
[AS_HELP_STRING([--enable-path-for-scripts=PREFIX],
[If PREFIX isn't empty, PATH=PREFIX:$PATH will be set in
the beginning of the scripts (xzgrep and others).
The default is empty except on Solaris the default is
/usr/xpg4/bin.])],
[], [
case $host_os in
solaris*) enable_path_for_scripts=/usr/xpg4/bin ;;
*) enable_path_for_scripts= ;;
esac
])
if test -n "$enable_path_for_scripts" && test "x$enable_path_for_scripts" != xno ; then
enable_path_for_scripts="PATH=$enable_path_for_scripts:\$PATH"
else
enable_path_for_scripts=
fi
AC_SUBST([enable_path_for_scripts])
###############################################################################
# Checks for programs.
###############################################################################
echo
case $host_os in
solaris*)
# The gnulib POSIX shell macro below may pick a shell that
# doesn't work with xzgrep. Workaround by picking a shell
# that is known to work.
if test -z "$gl_cv_posix_shell" && test -x /usr/xpg4/bin/sh; then
gl_cv_posix_shell=/usr/xpg4/bin/sh
fi
;;
esac
gl_POSIX_SHELL
if test -z "$POSIX_SHELL" && test "x$enable_scripts" = xyes ; then
AC_MSG_ERROR([No POSIX conforming shell (sh) was found.])
fi
echo
echo "Initializing Automake:"
# We don't use "subdir-objects" yet because it breaks "make distclean" when
# dependencies are enabled (as of Automake 1.14.1) due to this bug:
# https://debbugs.gnu.org/cgi/bugreport.cgi?bug=17354
# The -Wno-unsupported is used to silence warnings about missing
# "subdir-objects".
AM_INIT_AUTOMAKE([1.12 foreign tar-v7 filename-length-max=99 -Wno-unsupported])
AC_PROG_LN_S
dnl # Autoconf >= 2.70 warns that AC_PROG_CC_C99 is obsolete. However,
dnl # we have to keep using AC_PROG_CC_C99 instead of AC_PROG_CC
dnl # as long as we try to be compatible with Autoconf 2.69.
AC_PROG_CC_C99
if test x$ac_cv_prog_cc_c99 = xno ; then
AC_MSG_ERROR([No C99 compiler was found.])
fi
AM_PROG_CC_C_O
AM_PROG_AS
AC_USE_SYSTEM_EXTENSIONS
AS_CASE([$enable_threads],
[posix], [
echo
echo "POSIX threading support:"
AX_PTHREAD([:]) dnl We don't need the HAVE_PTHREAD macro.
LIBS="$LIBS $PTHREAD_LIBS"
AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS"
dnl NOTE: PTHREAD_CC is ignored. It would be useful on AIX,
dnl but it's tricky to get it right together with
dnl AC_PROG_CC_C99. Thus, this is handled by telling the
dnl user in INSTALL to set the correct CC manually.
AC_DEFINE([MYTHREAD_POSIX], [1],
[Define to 1 when using POSIX threads (pthreads).])
# This is nice to have but not mandatory.
OLD_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
AC_CHECK_FUNCS([pthread_condattr_setclock])
CFLAGS=$OLD_CFLAGS
],
[win95], [
AC_DEFINE([MYTHREAD_WIN95], [1], [Define to 1 when using
Windows 95 (and thus XP) compatible threads.
This avoids use of features that were added in
Windows Vista.])
],
[vista], [
AC_DEFINE([MYTHREAD_VISTA], [1], [Define to 1 when using
Windows Vista compatible threads. This uses
features that are not available on Windows XP.])
]
)
AM_CONDITIONAL([COND_THREADS], [test "x$enable_threads" != xno])
echo
echo "Initializing Libtool:"
LT_PREREQ([2.4])
LT_INIT([win32-dll])
LT_LANG([Windows Resource])
# This is a bit wrong since it is possible to request that only some libs
# are built as shared. Using that feature isn't so common though, and this
# breaks only on Windows (at least for now) if the user enables only some
# libs as shared.
AM_CONDITIONAL([COND_SHARED], [test "x$enable_shared" != xno])
#####################
# Symbol versioning #
#####################
# NOTE: This checks if we are building shared or static library
# and if --with-pic or --without-pic was used. Thus this check
# must be after Libtool initialization.
AC_MSG_CHECKING([if library symbol versioning should be used])
AC_ARG_ENABLE([symbol-versions], [AS_HELP_STRING([--enable-symbol-versions],
[Use symbol versioning for liblzma. Enabled by default on
GNU/Linux, other GNU-based systems, and FreeBSD.])],
[], [enable_symbol_versions=auto])
if test "x$enable_symbol_versions" = xauto; then
case $host_os in
# NOTE: Even if one omits -gnu on GNU/Linux (e.g.
# i486-slackware-linux), configure will (via config.sub)
# append -gnu (e.g. i486-slackware-linux-gnu), and this
# test will work correctly.
gnu* | *-gnu* | freebsd*)
enable_symbol_versions=yes
;;
*)
enable_symbol_versions=no
;;
esac
fi
# There are two variants for symbol versioning.
# See src/liblzma/validate_map.sh for details.
#
# On GNU/Linux, extra symbols are added in the C code. These extra symbols
# must not be put into a static library as they can cause problems (and
# even if they didn't cause problems, they would be useless). On other
# systems symbol versioning may be used too but there is no problem as only
# a linker script is specified in src/liblzma/Makefile.am and that isn't
# used when creating a static library.
#
# Libtool always uses -DPIC when building shared libraries by default and
# doesn't use it for static libs by default. This can be overridden with
# --with-pic and --without-pic though. As long as neither --with-pic nor
# --without-pic is used then we can use #ifdef PIC to detect if the file is
# being built for a shared library.
if test "x$enable_symbol_versions" = xno ; then
enable_symbol_versions=no
AC_MSG_RESULT([no])
elif test "x$enable_shared" = xno ; then
enable_symbol_versions=no
AC_MSG_RESULT([no (not building a shared library)])
else
case "$host_cpu-$host_os" in
microblaze*)
# GCC 12 on MicroBlaze doesn't support __symver__
# attribute. It's simplest and safest to use the
# generic version on that platform since then only
# the linker script is needed. The RHEL/CentOS 7
# compatibility symbols don't matter on MicroBlaze.
enable_symbol_versions=generic
;;
*-linux*)
case "$pic_mode-$enable_static" in
default-*)
# Use symvers if PIC is defined.
have_symbol_versions_linux=2
;;
*-no)
# Not building static library.
# Use symvers unconditionally.
have_symbol_versions_linux=1
;;
*)
AC_MSG_RESULT([])
AC_MSG_ERROR([
On GNU/Linux, building both shared and static library at the same time
is not supported if --with-pic or --without-pic is used.
Use either --disable-shared or --disable-static to build one type
of library at a time. If both types are needed, build one at a time,
possibly picking only src/liblzma/.libs/liblzma.a from the static build.])
;;
esac
enable_symbol_versions=linux
AC_DEFINE_UNQUOTED([HAVE_SYMBOL_VERSIONS_LINUX],
[$have_symbol_versions_linux],
[Define to 1 to if GNU/Linux-specific details
are unconditionally wanted for symbol
versioning. Define to 2 to if these are wanted
only if also PIC is defined (allows building
both shared and static liblzma at the same
time with Libtool if neither --with-pic nor
--without-pic is used). This define must be
used together with liblzma_linux.map.])
;;
*)
enable_symbol_versions=generic
;;
esac
AC_MSG_RESULT([yes ($enable_symbol_versions)])
fi
AM_CONDITIONAL([COND_SYMVERS_LINUX],
[test "x$enable_symbol_versions" = xlinux])
AM_CONDITIONAL([COND_SYMVERS_GENERIC],
[test "x$enable_symbol_versions" = xgeneric])
###############################################################################
# Checks for libraries.
###############################################################################
dnl Support for _REQUIRE_VERSION was added in gettext 0.19.6. If both
dnl _REQUIRE_VERSION and _VERSION are present, the _VERSION is ignored.
dnl We use both for compatibility with other programs in the Autotools family.
echo
echo "Initializing gettext:"
AM_GNU_GETTEXT_REQUIRE_VERSION([0.19.6])
AM_GNU_GETTEXT_VERSION([0.19.6])
AM_GNU_GETTEXT([external])
###############################################################################
# Checks for header files.
###############################################################################
echo
echo "System headers and functions:"
# There is currently no workarounds in this package if some of
# these headers are missing.
AC_CHECK_HEADERS([fcntl.h limits.h sys/time.h],
[],
[AC_MSG_ERROR([Required header file(s) are missing.])])
# immintrin.h allows the use of the intrinsic functions if they are available.
# cpuid.h may be used for detecting x86 processor features at runtime.
AC_CHECK_HEADERS([immintrin.h cpuid.h])
###############################################################################
# Checks for typedefs, structures, and compiler characteristics.
###############################################################################
AC_HEADER_STDBOOL
AC_TYPE_UINT8_T
AC_TYPE_UINT16_T
AC_TYPE_INT32_T
AC_TYPE_UINT32_T
AC_TYPE_INT64_T
AC_TYPE_UINT64_T
AC_TYPE_UINTPTR_T
AC_CHECK_SIZEOF([size_t])
# The command line tool can copy high resolution timestamps if such
# information is available in struct stat. Otherwise one second accuracy
# is used.
AC_CHECK_MEMBERS([
struct stat.st_atim.tv_nsec,
struct stat.st_atimespec.tv_nsec,
struct stat.st_atimensec,
struct stat.st_uatime,
struct stat.st_atim.st__tim.tv_nsec])
AC_SYS_LARGEFILE
AC_C_BIGENDIAN
# __attribute__((__constructor__)) can be used for one-time initializations.
# Use -Werror because some compilers accept unknown attributes and just
# give a warning.
#
# FIXME? Unfortunately -Werror can cause trouble if CFLAGS contains options
# that produce warnings for unrelated reasons. For example, GCC and Clang
# support -Wunused-macros which will warn about "#define _GNU_SOURCE 1"
# which will be among the #defines that Autoconf inserts to the beginning of
# the test program. There seems to be no nice way to prevent Autoconf from
# inserting the any defines to the test program.
AC_MSG_CHECKING([if __attribute__((__constructor__)) can be used])
have_func_attribute_constructor=no
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
__attribute__((__constructor__))
static void my_constructor_func(void) { return; }
]])], [
AC_DEFINE([HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR], [1],
[Define to 1 if __attribute__((__constructor__))
is supported for functions.])
have_func_attribute_constructor=yes
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
CFLAGS="$OLD_CFLAGS"
# The Win95 threading lacks a thread-safe one-time initialization function.
# The one-time initialization is needed for crc32_small.c and crc64_small.c
# create the CRC tables. So if small mode is enabled, the threading mode is
# win95, and the compiler does not support attribute constructor, then we
# would end up with a multithreaded build that is thread-unsafe. As a
# result this configuration is not allowed.
if test "x$enable_small$enable_threads$have_func_attribute_constructor" \
= xyeswin95no; then
AC_MSG_ERROR([
--enable-threads=win95 and --enable-small cannot be used
at the same time with a compiler that doesn't support
__attribute__((__constructor__))])
fi
# __attribute__((__ifunc__())) can be used to choose between different
# implementations of the same function at runtime. This is slightly more
# efficient than using __attribute__((__constructor__)) and setting
# a function pointer.
AC_ARG_ENABLE([ifunc], [AS_HELP_STRING([--enable-ifunc],
[Use __attribute__((__ifunc__())). Enabled by default on
GNU/Linux (glibc) and FreeBSD.])],
[], [enable_ifunc=auto])
# When enable_ifunc is 'auto', allow the use of __attribute__((__ifunc__()))
# if compiler support is detected and we are building for GNU/Linux (glibc)
# or FreeBSD. uClibc and musl don't support ifunc in their dynamic linkers
# but some compilers still accept the attribute when compiling for these
# C libraries, which results in broken binaries. That's why we need to
# check which libc is being used.
if test "x$enable_ifunc" = xauto ; then
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_MSG_CHECKING([if __attribute__((__ifunc__())) can be used])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
/*
* Force a compilation error when not using glibc on Linux
* or if we are not using FreeBSD. uClibc will define
* __GLIBC__ but does not support ifunc, so we must have
* an extra check to disable with uClibc.
*/
#if defined(__linux__)
# include <features.h>
# if !defined(__GLIBC__) || defined(__UCLIBC__)
compile error
# endif
#elif !defined(__FreeBSD__)
compile error
#endif
static void func(void) { return; }
/*
* The attribute __no_profile_instrument_function__ is
* needed with GCC to prevent improper instrumentation in
* the ifunc resolver.
*/
__attribute__((__no_profile_instrument_function__))
static void (*resolve_func (void)) (void) { return func; }
void func_ifunc (void)
__attribute__((__ifunc__("resolve_func")));
/*
* 'clang -Wall' incorrectly warns that resolve_func is
* unused (-Wunused-function). Correct assembly output is
* still produced. This problem exists at least in Clang
* versions 4 to 17. The following silences the bogus warning:
*/
void make_clang_quiet(void);
void make_clang_quiet(void) { resolve_func()(); }
]])], [
enable_ifunc=yes
], [
enable_ifunc=no
])
AC_MSG_RESULT([$enable_ifunc])
CFLAGS="$OLD_CFLAGS"
fi
if test "x$enable_ifunc" = xyes ; then
AC_DEFINE([HAVE_FUNC_ATTRIBUTE_IFUNC], [1],
[Define to 1 if __attribute__((__ifunc__()))
is supported for functions.])
# ifunc explicitly does not work with -fsanitize=address.
# If configured, it will result in a liblzma build that will fail
# when liblzma is loaded at runtime (when the ifunc resolver
# executes).
AS_CASE([$CFLAGS], [*-fsanitize=*], [AC_MSG_ERROR([
CFLAGS contains '-fsanitize=' which is incompatible with ifunc.
Use --disable-ifunc when using '-fsanitize'.])])
fi
###############################################################################
# Checks for library functions.
###############################################################################
# Gnulib replacements as needed
gl_GETOPT
# If clock_gettime() is available, liblzma with pthreads may use it, and
# xz may use it even when threading support is disabled. In XZ Utils 5.4.x
# and older, configure checked for clock_gettime() only when using pthreads.
# This way non-threaded builds of liblzma didn't get a useless dependency on
# librt which further had a dependency on libpthread. Avoiding these was
# useful when a small build was needed, for example, for initramfs use.
#
# The above reasoning is thoroughly obsolete: On GNU/Linux, librt hasn't
# been needed for clock_gettime() since glibc 2.17 (2012-12-25).
# Solaris 10 needs librt but Solaris 11 doesn't anymore.
AC_SEARCH_LIBS([clock_gettime], [rt])
AC_CHECK_FUNCS([clock_gettime])
AC_CHECK_DECL([CLOCK_MONOTONIC], [AC_DEFINE([HAVE_CLOCK_MONOTONIC], [1],
[Define to 1 if 'CLOCK_MONOTONIC' is declared in <time.h>.])], [],
[[#include <time.h>]])
# Find the best function to set timestamps.
AC_CHECK_FUNCS([futimens futimes futimesat utimes _futime utime], [break])
# This is nice to have but not mandatory.
AC_CHECK_FUNCS([posix_fadvise])
TUKLIB_PROGNAME
TUKLIB_INTEGER
TUKLIB_PHYSMEM
TUKLIB_CPUCORES
TUKLIB_MBSTR
# If requested, check for system-provided SHA-256. At least the following
# implementations are supported:
#
# OS Headers Library Type Function
# FreeBSD sys/types.h + sha256.h libmd SHA256_CTX SHA256_Init
# NetBSD sys/types.h + sha2.h SHA256_CTX SHA256_Init
# OpenBSD sys/types.h + sha2.h SHA2_CTX SHA256Init
# Solaris sys/types.h + sha2.h libmd SHA256_CTX SHA256Init
# MINIX 3 sys/types.h + sha2.h SHA256_CTX SHA256_Init