mirrored from git://gcc.gnu.org/git/gcc.git
/
configure.ac
6725 lines (6210 loc) · 209 KB
/
configure.ac
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# configure.ac for GCC
# Process this file with autoconf to generate a configuration script.
# Copyright (C) 1997-2019 Free Software Foundation, Inc.
#This file is part of GCC.
#GCC 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, or (at your option) any later
#version.
#GCC 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 GCC; see the file COPYING3. If not see
#<http://www.gnu.org/licenses/>.
# --------------------------------
# Initialization and sanity checks
# --------------------------------
AC_INIT
AC_CONFIG_SRCDIR(tree.c)
AC_CONFIG_HEADER(auto-host.h:config.in)
gcc_version=`cat $srcdir/BASE-VER`
# Determine the host, build, and target systems
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
# Determine the noncanonical host name, for Ada.
ACX_NONCANONICAL_HOST
# Determine the noncanonical target name, for directory use.
ACX_NONCANONICAL_TARGET
# Used for constructing correct paths for offload compilers.
real_target_noncanonical=${target_noncanonical}
accel_dir_suffix=
# Determine the target- and build-specific subdirectories
GCC_TOPLEV_SUBDIRS
# Set program_transform_name
AC_ARG_PROGRAM
# Check for bogus environment variables.
# Test if LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(LIBRARY_PATH variable)
changequote(,)dnl
case ${LIBRARY_PATH} in
[:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
library_path_setting="contains current directory"
;;
*)
library_path_setting="ok"
;;
esac
changequote([,])dnl
AC_MSG_RESULT($library_path_setting)
if test "$library_path_setting" != "ok"; then
AC_MSG_ERROR([
*** LIBRARY_PATH shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi
# Test if GCC_EXEC_PREFIX contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# GCC_EXEC_PREFIX contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
changequote(,)dnl
case ${GCC_EXEC_PREFIX} in
[:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
gcc_exec_prefix_setting="contains current directory"
;;
*)
gcc_exec_prefix_setting="ok"
;;
esac
changequote([,])dnl
AC_MSG_RESULT($gcc_exec_prefix_setting)
if test "$gcc_exec_prefix_setting" != "ok"; then
AC_MSG_ERROR([
*** GCC_EXEC_PREFIX shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi
# -----------
# Directories
# -----------
# Specify the local prefix
local_prefix=
AC_ARG_WITH(local-prefix,
[AS_HELP_STRING([--with-local-prefix=DIR],
[specifies directory to put local include])],
[case "${withval}" in
yes) AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
no) ;;
*) local_prefix=$with_local_prefix ;;
esac])
# Default local prefix if it is empty
if test x$local_prefix = x; then
local_prefix=/usr/local
fi
AC_ARG_WITH([native-system-header-dir],
[ --with-native-system-header-dir=dir
use dir as the directory to look for standard
system header files in. Defaults to /usr/include.],
[
case ${with_native_system_header_dir} in
yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
/* | [[A-Za-z]]:[[\\/]]*) ;;
*) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
esac
configured_native_system_header_dir="${withval}"
], [configured_native_system_header_dir=])
AC_ARG_WITH(build-sysroot,
[AS_HELP_STRING([--with-build-sysroot=sysroot],
[use sysroot as the system root during the build])],
[if test x"$withval" != x ; then
SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
fi],
[SYSROOT_CFLAGS_FOR_TARGET=])
AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
if test "x$prefix" = xNONE; then
test_prefix=/usr/local
else
test_prefix=$prefix
fi
if test "x$exec_prefix" = xNONE; then
test_exec_prefix=$test_prefix
else
test_exec_prefix=$exec_prefix
fi
AC_ARG_WITH(sysroot,
[AS_HELP_STRING([[--with-sysroot[=DIR]]],
[search for usr/lib, usr/include, et al, within DIR])],
[
case ${with_sysroot} in
/) ;;
*/) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
esac
case ${with_sysroot} in
yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
*) TARGET_SYSTEM_ROOT=$with_sysroot ;;
esac
TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
case ${TARGET_SYSTEM_ROOT} in
"${test_prefix}"|"${test_prefix}/"*|\
"${test_exec_prefix}"|"${test_exec_prefix}/"*|\
'${prefix}'|'${prefix}/'*|\
'${exec_prefix}'|'${exec_prefix}/'*)
t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
TARGET_SYSTEM_ROOT_DEFINE="$t"
;;
esac
], [
TARGET_SYSTEM_ROOT=
TARGET_SYSTEM_ROOT_DEFINE=
CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
])
AC_SUBST(TARGET_SYSTEM_ROOT)
AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
# Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
# passed in by the toplevel make and thus we'd get different behavior
# depending on where we built the sources.
gcc_gxx_include_dir=
# Specify the g++ header file directory
AC_ARG_WITH(gxx-include-dir,
[AS_HELP_STRING([--with-gxx-include-dir=DIR],
[specifies directory to put g++ header files])],
[case "${withval}" in
yes) AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
no) ;;
*) gcc_gxx_include_dir=$with_gxx_include_dir ;;
esac])
# If both --with-sysroot and --with-gxx-include-dir are passed, we interpolate
# the former in the latter and, upon success, compute gcc_gxx_include_dir as
# relative to the sysroot.
gcc_gxx_include_dir_add_sysroot=0
# This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
if test x${gcc_gxx_include_dir} = x; then
if test x${enable_version_specific_runtime_libs} = xyes; then
gcc_gxx_include_dir='${libsubdir}/include/c++'
else
libstdcxx_incdir='include/c++/$(version)'
if test x$host != x$target; then
libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
fi
gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
fi
elif test "${with_sysroot+set}" = set; then
gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
if test "${gcc_gxx_without_sysroot}"; then
gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
gcc_gxx_include_dir_add_sysroot=1
fi
fi
AC_ARG_WITH(cpp_install_dir,
[AC_HELP_STRING([--with-cpp-install-dir=DIR],
[install the user visible C preprocessor in DIR
(relative to PREFIX) as well as PREFIX/bin])],
[if test x$withval = xyes; then
AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
elif test x$withval != xno; then
cpp_install_dir=$withval
fi])
# We would like to our source tree to be readonly. However when releases or
# pre-releases are generated, the flex/bison generated files as well as the
# various formats of manuals need to be included along with the rest of the
# sources. Therefore we have --enable-generated-files-in-srcdir to do
# just that.
AC_MSG_CHECKING([whether to place generated files in the source directory])
dnl generated-files-in-srcdir is disabled by default
AC_ARG_ENABLE(generated-files-in-srcdir,
[AS_HELP_STRING([--enable-generated-files-in-srcdir],
[put copies of generated files in source dir
intended for creating source tarballs for users
without texinfo bison or flex])],
generated_files_in_srcdir=$enableval,
generated_files_in_srcdir=no)
AC_MSG_RESULT($generated_files_in_srcdir)
if test "$generated_files_in_srcdir" = "yes"; then
GENINSRC=''
else
GENINSRC='#'
fi
AC_SUBST(GENINSRC)
# -------------------
# Find default linker
# -------------------
# With GNU ld
AC_ARG_WITH(gnu-ld,
[AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
gnu_ld_flag="$with_gnu_ld",
gnu_ld_flag=no)
case $target in
*darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
*) ld64_flag=no;;
esac
# With pre-defined ld
AC_ARG_WITH(ld,
[AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
DEFAULT_LINKER="$with_ld")
if test x"${DEFAULT_LINKER+set}" = x"set"; then
if test ! -x "$DEFAULT_LINKER"; then
AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
gnu_ld_flag=yes
elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
ld64_flag=yes
fi
AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
[Define to enable the use of a default linker.])
fi
AC_MSG_CHECKING([whether a default linker was specified])
if test x"${DEFAULT_LINKER+set}" = x"set"; then
if test x"$gnu_ld_flag" = x"no"; then
AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
else
AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
fi
else
AC_MSG_RESULT(no)
fi
# With demangler in GNU ld
AC_ARG_WITH(demangler-in-ld,
[AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
demangler_in_ld="$with_demangler_in_ld",
demangler_in_ld=yes)
# ----------------------
# Find default assembler
# ----------------------
# With GNU as
AC_ARG_WITH(gnu-as,
[AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
gas_flag="$with_gnu_as",
gas_flag=no)
AC_ARG_WITH(as,
[AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
DEFAULT_ASSEMBLER="$with_as")
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
if test ! -x "$DEFAULT_ASSEMBLER"; then
AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
gas_flag=yes
fi
AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
[Define to enable the use of a default assembler.])
fi
AC_MSG_CHECKING([whether a default assembler was specified])
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
if test x"$gas_flag" = x"no"; then
AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
else
AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
fi
else
AC_MSG_RESULT(no)
fi
# ---------------
# Find C compiler
# ---------------
# If a non-executable a.out is present (e.g. created by GNU as above even if
# invoked with -v only), the IRIX 6 native ld just overwrites the existing
# file, even when creating an executable, so an execution test fails.
# Remove possible default executable files to avoid this.
#
# FIXME: This really belongs into AC_PROG_CC and can be removed once
# Autoconf includes it.
rm -f a.out a.exe b.out
# Find the native compiler
AC_PROG_CC
AC_PROG_CXX
ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
# Do configure tests with the C++ compiler, since that's what we build with.
AC_LANG(C++)
# Remove the -O2: for historical reasons, unless bootstrapping we prefer
# optimizations to be activated explicitly by the toplevel.
case "$CC" in
*/prev-gcc/xgcc*) ;;
*) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" `
CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[ ]]//" -e "s/-O[[gs]][[ ]]//" -e "s/-O[[0-9]]*[[ ]]//" ` ;;
esac
AC_SUBST(CFLAGS)
AC_SUBST(CXXFLAGS)
# Determine PICFLAG for target gnatlib.
GCC_PICFLAG_FOR_TARGET
AC_SUBST(PICFLAG_FOR_TARGET)
# -------------------------
# Check C compiler features
# -------------------------
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CPP
AC_C_INLINE
AC_SYS_LARGEFILE
# sizeof(char) is 1 by definition.
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
GCC_STDINT_TYPES
if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
AC_MSG_ERROR([uint64_t or int64_t not found])
fi
# check what underlying integer type int64_t uses
AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
template <typename T> struct X { };
template <>
struct X<long> { typedef long t; };
]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
if test "$ac_cv_int64_t_type" = "long"; then
AC_DEFINE(INT64_T_IS_LONG, 1,
[Define if int64_t uses long as underlying type.])
else
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
template <typename T> struct X { };
template <>
struct X<long long> { typedef long long t; };
]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
fi
AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <utility>
]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
if test $ac_cv_std_swap_in_utility = yes; then
AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
[Define if <utility> defines std::swap.])
fi
# Check whether compiler is affected by placement new aliasing bug (PR 29286).
# If the host compiler is affected by the bug, and we build with optimization
# enabled (which happens e.g. when cross-compiling), the pool allocator may
# get miscompiled. Use -fno-strict-aliasing to work around this problem.
# Since there is no reliable feature check for the presence of this bug,
# we simply use a GCC version number check. (This should never trigger for
# stages 2 or 3 of a native bootstrap.)
aliasing_flags=
if test "$GCC" = yes; then
saved_CXXFLAGS="$CXXFLAGS"
# The following test compilation will succeed if and only if $CXX accepts
# -fno-strict-aliasing *and* is older than GCC 4.3.
CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
#error compiler not affected by placement new aliasing bug
#endif
])],
[AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
[AC_MSG_RESULT([no])])
CXXFLAGS="$saved_CXXFLAGS"
fi
AC_SUBST(aliasing_flags)
# ---------------------
# Warnings and checking
# ---------------------
# Check $CC warning features (if it's GCC).
# We want to use -pedantic, but we don't want warnings about
# * 'long long'
# * variadic macros
# * overlong strings
# * C++11 narrowing conversions in { }
# So, we only use -pedantic if we can disable those warnings.
# In stage 1, disable -Wformat warnings from old GCCs about new % codes
AC_ARG_ENABLE(build-format-warnings,
AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
[],[enable_build_format_warnings=yes])
AS_IF([test $enable_build_format_warnings = no],
[wf_opt=-Wno-format],[wf_opt=])
ACX_PROG_CXX_WARNING_OPTS(
m4_quote(m4_do([-W -Wall -Wclass-is-pod -Wmismatched-tags ],
[-Wno-narrowing -Wstruct-not-pod -Wwrite-strings ],
[-Wcast-qual -Wno-error=format-diag $wf_opt])),
[loose_warn])
ACX_PROG_CC_WARNING_OPTS(
m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes ],
[-Wno-error=format-diag])), [c_loose_warn])
ACX_PROG_CXX_WARNING_OPTS(
m4_quote(m4_do([-Wmissing-format-attribute ],
[-Woverloaded-virtual])), [strict_warn])
ACX_PROG_CC_WARNING_OPTS(
m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
[-Wno-overlength-strings])), [strict_warn])
ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
# The above macros do nothing if the compiler is not GCC. However, the
# Makefile has more goo to add other flags, so these variables are used
# to enable warnings only for GCC.
warn_cflags=
warn_cxxflags=
if test "x$GCC" = "xyes"; then
warn_cflags='$(GCC_WARN_CFLAGS)'
warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
fi
AC_SUBST(warn_cflags)
AC_SUBST(warn_cxxflags)
# Disable exceptions and RTTI if building with g++
ACX_PROG_CC_WARNING_OPTS(
m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
[noexception_flags])
# Enable expensive internal checks
is_release=
if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
is_release=yes
fi
AC_ARG_ENABLE(checking,
[AS_HELP_STRING([[--enable-checking[=LIST]]],
[enable expensive run-time checks. With LIST,
enable only specific categories of checks.
Categories are: yes,no,all,none,release.
Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
rtlflag,rtl,runtime,tree,valgrind,types])],
[ac_checking_flags="${enableval}"],[
# Determine the default checks.
if test x$is_release = x ; then
ac_checking_flags=yes,extra
else
ac_checking_flags=release
fi])
IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
for check in release $ac_checking_flags
do
case $check in
# these set all the flags to specific states
yes) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
ac_tree_checking=1 ; ac_valgrind_checking= ;
ac_types_checking=1 ;;
no|none) ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
ac_rtlflag_checking= ; ac_runtime_checking= ;
ac_tree_checking= ; ac_valgrind_checking= ;
ac_types_checking= ;;
all) ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
ac_tree_checking=1 ; ac_valgrind_checking= ;
ac_types_checking=1 ;;
release) ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
ac_rtlflag_checking= ; ac_runtime_checking=1 ;
ac_tree_checking= ; ac_valgrind_checking= ;
ac_types_checking= ;;
# these enable particular checks
assert) ac_assert_checking=1 ;;
df) ac_df_checking=1 ;;
extra) ac_extra_checking=1 ;;
fold) ac_fold_checking=1 ;;
gc) ac_gc_checking=1 ;;
gcac) ac_gc_always_collect=1 ;;
gimple) ac_gimple_checking=1 ;;
misc) ac_checking=1 ;;
rtl) ac_rtl_checking=1 ;;
rtlflag) ac_rtlflag_checking=1 ;;
runtime) ac_runtime_checking=1 ;;
tree) ac_tree_checking=1 ;;
types) ac_types_checking=1 ;;
valgrind) ac_valgrind_checking=1 ;;
*) AC_MSG_ERROR(unknown check category $check) ;;
esac
done
IFS="$ac_save_IFS"
nocommon_flag=""
if test x$ac_checking != x ; then
AC_DEFINE(CHECKING_P, 1,
[Define to 0/1 if you want more run-time sanity checks. This one gets a grab
bag of miscellaneous but relatively cheap checks.])
nocommon_flag=-fno-common
else
AC_DEFINE(CHECKING_P, 0)
fi
AC_SUBST(nocommon_flag)
if test x$ac_extra_checking != x ; then
AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
[Define to 0/1 if you want extra run-time checking that might affect code
generation.])
else
AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
fi
if test x$ac_df_checking != x ; then
AC_DEFINE(ENABLE_DF_CHECKING, 1,
[Define if you want more run-time sanity checks for dataflow.])
fi
if test x$ac_assert_checking != x ; then
AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
[Define if you want assertions enabled. This is a cheap check.])
fi
if test x$ac_gimple_checking != x ; then
AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
[Define if you want operations on GIMPLE (the basic data structure of
the high-level optimizers) to be checked for dynamic type safety at
runtime. This is moderately expensive.])
fi
GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
if test x$ac_runtime_checking != x ; then
AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
[Define if you want runtime assertions enabled. This is a cheap check.])
fi
if test x$ac_tree_checking != x ; then
AC_DEFINE(ENABLE_TREE_CHECKING, 1,
[Define if you want all operations on trees (the basic data
structure of the front ends) to be checked for dynamic type safety
at runtime. This is moderately expensive.
])
TREECHECKING=yes
fi
if test x$ac_types_checking != x ; then
AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
[Define if you want all gimple types to be verified after gimplifiation.
This is cheap.
])
fi
AC_SUBST(TREECHECKING)
if test x$ac_rtl_checking != x ; then
AC_DEFINE(ENABLE_RTL_CHECKING, 1,
[Define if you want all operations on RTL (the basic data structure
of the optimizer and back end) to be checked for dynamic type safety
at runtime. This is quite expensive.])
fi
if test x$ac_rtlflag_checking != x ; then
AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
[Define if you want RTL flag accesses to be checked against the RTL
codes that are supported for each access macro. This is relatively
cheap.])
fi
if test x$ac_gc_checking != x ; then
AC_DEFINE(ENABLE_GC_CHECKING, 1,
[Define if you want the garbage collector to do object poisoning and
other memory allocation checks. This is quite expensive.])
fi
if test x$ac_gc_always_collect != x ; then
AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
[Define if you want the garbage collector to operate in maximally
paranoid mode, validating the entire heap and collecting garbage at
every opportunity. This is extremely expensive.])
fi
if test x$ac_fold_checking != x ; then
AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
[Define if you want fold checked that it never destructs its argument.
This is quite expensive.])
fi
valgrind_path_defines=
valgrind_command=
dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
dnl # an if statement. This was the source of very frustrating bugs
dnl # in converting to autoconf 2.5x!
AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
# It is certainly possible that there's valgrind but no valgrind.h.
# GCC relies on making annotations so we must have both.
AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
AC_PREPROC_IFELSE([AC_LANG_SOURCE(
[[#include <valgrind/memcheck.h>
#ifndef VALGRIND_DISCARD
#error VALGRIND_DISCARD not defined
#endif]])],
[gcc_cv_header_valgrind_memcheck_h=yes],
[gcc_cv_header_valgrind_memcheck_h=no])
AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
AC_PREPROC_IFELSE([AC_LANG_SOURCE(
[[#include <memcheck.h>
#ifndef VALGRIND_DISCARD
#error VALGRIND_DISCARD not defined
#endif]])],
[gcc_cv_header_memcheck_h=yes],
[gcc_cv_header_memcheck_h=no])
AC_MSG_RESULT($gcc_cv_header_memcheck_h)
if test $gcc_cv_header_valgrind_memcheck_h = yes; then
AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
[Define if valgrind's valgrind/memcheck.h header is installed.])
fi
if test $gcc_cv_header_memcheck_h = yes; then
AC_DEFINE(HAVE_MEMCHECK_H, 1,
[Define if valgrind's memcheck.h header is installed.])
fi
if test x$ac_valgrind_checking != x ; then
AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
[$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
if test "x$valgrind_path" = "x" \
|| (test $have_valgrind_h = no \
&& test $gcc_cv_header_memcheck_h = no \
&& test $gcc_cv_header_valgrind_memcheck_h = no); then
AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
fi
valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
valgrind_command="$valgrind_path -q"
AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
[Define if you want to run subprograms and generated programs
through valgrind (a memory checker). This is extremely expensive.])
fi
AC_SUBST(valgrind_path_defines)
AC_SUBST(valgrind_command)
# Enable code coverage collection
AC_ARG_ENABLE(coverage,
[AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
[enable compiler's code coverage collection.
Use to measure compiler performance and locate
unused parts of the compiler. With LEVEL, specify
optimization. Values are opt, noopt,
default is noopt])],
[case "${enableval}" in
yes|noopt)
coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-static-functions"
;;
opt)
coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-static-functions"
;;
no)
# a.k.a. --disable-coverage
coverage_flags=""
;;
*)
AC_MSG_ERROR(unknown coverage setting $enableval)
;;
esac],
[coverage_flags=""])
AC_SUBST(coverage_flags)
AC_ARG_ENABLE(gather-detailed-mem-stats,
[AS_HELP_STRING([--enable-gather-detailed-mem-stats],
[enable detailed memory allocation stats gathering])], [],
[enable_gather_detailed_mem_stats=no])
gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
[Define to enable detailed memory allocation stats gathering.])
AC_ARG_ENABLE(valgrind-annotations,
[AS_HELP_STRING([--enable-valgrind-annotations],
[enable valgrind runtime interaction])], [],
[enable_valgrind_annotations=no])
if test x$enable_valgrind_annotations != xno \
|| test x$ac_valgrind_checking != x; then
if (test $have_valgrind_h = no \
&& test $gcc_cv_header_memcheck_h = no \
&& test $gcc_cv_header_valgrind_memcheck_h = no); then
AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
fi
AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
[Define to get calls to the valgrind runtime enabled.])
fi
# -------------------------------
# Miscenalleous configure options
# -------------------------------
# With stabs
AC_ARG_WITH(stabs,
[AS_HELP_STRING([--with-stabs],
[arrange to use stabs instead of host debug format])],
stabs="$with_stabs",
stabs=no)
# Determine whether or not multilibs are enabled.
AC_ARG_ENABLE(multilib,
[AS_HELP_STRING([--enable-multilib],
[enable library support for multiple ABIs])],
[], [enable_multilib=yes])
AC_SUBST(enable_multilib)
# Determine whether or not multiarch is enabled.
AC_ARG_ENABLE(multiarch,
[AS_HELP_STRING([--enable-multiarch],
[enable support for multiarch paths])],
[case "${enableval}" in
yes|no|auto) enable_multiarch=$enableval;;
*) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
esac], [enable_multiarch=auto])
if test x${enable_multiarch} = xauto; then
if test x${with_native_system_header_dir} != x; then
ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
enable_multiarch=no
fi
if test x$host != x$target && test "x$with_sysroot" = x; then
ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
enable_multiarch=no
fi
fi
AC_MSG_CHECKING(for multiarch configuration)
AC_SUBST(enable_multiarch)
AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
# needed for setting the multiarch name for soft-float/hard-float ABIs
AC_SUBST(with_cpu)
AC_SUBST(with_float)
# default stack clash protection guard size as power of twos in bytes.
# Please keep these in sync with params.def.
stk_clash_min=12
stk_clash_max=30
# Keep the default value when the option is not used to 0, this allows us to
# distinguish between the cases where the user specifially set a value via
# configure and when the normal default value is used.
AC_ARG_WITH(stack-clash-protection-guard-size,
[AS_HELP_STRING([--with-stack-clash-protection-guard-size=size],
[Set the default stack clash protection guard size for specific targets as a power of two in bytes.])],
[DEFAULT_STK_CLASH_GUARD_SIZE="$with_stack_clash_protection_guard_size"], [DEFAULT_STK_CLASH_GUARD_SIZE=0])
if test $DEFAULT_STK_CLASH_GUARD_SIZE -ne 0 \
&& (test $DEFAULT_STK_CLASH_GUARD_SIZE -lt $stk_clash_min \
|| test $DEFAULT_STK_CLASH_GUARD_SIZE -gt $stk_clash_max); then
AC_MSG_ERROR(m4_normalize([
Invalid value $DEFAULT_STK_CLASH_GUARD_SIZE for --with-stack-clash-protection-guard-size. \
Must be between $stk_clash_min and $stk_clash_max.]))
fi
AC_DEFINE_UNQUOTED(DEFAULT_STK_CLASH_GUARD_SIZE, $DEFAULT_STK_CLASH_GUARD_SIZE,
[Define to larger than zero set the default stack clash protector size.])
# Enable __cxa_atexit for C++.
AC_ARG_ENABLE(__cxa_atexit,
[AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
[], [])
# Enable C extension for decimal float if target supports it.
GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
[Define to 1 to enable decimal float extension to C.])
# Use default_decimal_float for dependency.
enable_decimal_float=$default_decimal_float
bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
[Define to 1 to specify that we are using the BID decimal floating
point format instead of DPD])
# Enable C extension for fixed-point arithmetic.
AC_ARG_ENABLE(fixed-point,
[AS_HELP_STRING([--enable-fixed-point],
[enable fixed-point arithmetic extension to C])],
[],
[
case $target in
arm*)
enable_fixed_point=yes
;;
mips*-*-*)
enable_fixed_point=yes
;;
*)
AC_MSG_WARN([fixed-point is not supported for this target, ignored])
enable_fixed_point=no
;;
esac
])
AC_SUBST(enable_fixed_point)
fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
[Define to 1 to enable fixed-point arithmetic extension to C.])
# Enable threads
# Pass with no value to take the default
# Pass with a value to specify a thread package
AC_ARG_ENABLE(threads,
[AS_HELP_STRING([[--enable-threads[=LIB]]],
[enable thread usage for target GCC,
using LIB thread package])],,
[enable_threads=''])
AC_ARG_ENABLE(tls,
[AS_HELP_STRING([--enable-tls],
[enable or disable generation of tls code
overriding the assembler check for tls support])],
[
case $enable_tls in
yes | no) ;;
*) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
Valid choices are 'yes' and 'no'.]) ;;
esac
], [enable_tls=''])
AC_ARG_ENABLE(vtable-verify,
[AS_HELP_STRING([--enable-vtable-verify],
[enable vtable verification feature])],,
[enable_vtable_verify=no])
vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
[Define 0/1 if vtable verification feature is enabled.])
AC_ARG_ENABLE(objc-gc,
[AS_HELP_STRING([--enable-objc-gc],
[enable the use of Boehm's garbage collector with
the GNU Objective-C runtime])],
if test x$enable_objc_gc = xno; then
objc_boehm_gc=''
else
objc_boehm_gc=1
fi,
objc_boehm_gc='')
AC_ARG_WITH(dwarf2,
[AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
dwarf2="$with_dwarf2",
dwarf2=no)
AC_ARG_ENABLE(shared,
[AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
[
case $enable_shared in
yes | no) ;;
*)
enable_shared=no
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
for pkg in $enableval; do
if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
enable_shared=yes
fi
done
IFS="$ac_save_ifs"
;;
esac
], [enable_shared=yes])
AC_SUBST(enable_shared)
AC_ARG_ENABLE(gcov,
[ --disable-gcov don't provide libgcov and related host tools],
[], [enable_gcov=yes])
AC_SUBST(enable_gcov)
AC_ARG_WITH(specs,
[AS_HELP_STRING([--with-specs=SPECS],
[add SPECS to driver command-line processing])],
[CONFIGURE_SPECS=$withval],
[CONFIGURE_SPECS=]
)
AC_SUBST(CONFIGURE_SPECS)
ACX_PKGVERSION([GCC])
ACX_BUGURL([https://gcc.gnu.org/bugs/])
# Sanity check enable_languages in case someone does not run the toplevel
# configure # script.
AC_ARG_ENABLE(languages,
[AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
[case ,${enable_languages}, in
,,|,yes,)
# go safe -- we cannot be much sure without the toplevel
# configure's
# analysis of which target libs are present and usable
enable_languages=c
;;
*,all,*)
AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
;;
*,c,*)
;;
*)
enable_languages=c,${enable_languages}
;;
esac],
[enable_languages=c])
if test x"$enable_as_accelerator_for" != x; then
AC_DEFINE(ACCEL_COMPILER, 1,
[Define if this compiler should be built as the offload target compiler.])
enable_as_accelerator=yes
case "${target}" in
*-intelmicemul-*)
# In this case we expect offload compiler to be built as native, so we
# need to rename the driver to avoid clashes with host's drivers.
program_transform_name="s&^&${target}-&" ;;
esac
sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
program_transform_name=`echo $program_transform_name | sed $sedscript`
accel_dir_suffix=/accel/${target_noncanonical}
real_target_noncanonical=${enable_as_accelerator_for}
fi