gecko-dev/build/autoconf/toolchain.m4

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dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
AC_DEFUN([MOZ_TOOL_VARIABLES],
[
GNU_AS=
GNU_LD=
GNU_CC=
GNU_CXX=
CC_VERSION='N/A'
CXX_VERSION='N/A'
cat <<EOF > conftest.c
#if defined(_MSC_VER)
#if defined(__clang__)
COMPILER clang-cl _MSC_VER
#else
COMPILER msvc _MSC_FULL_VER
#endif
#elif defined(__clang__)
COMPILER clang __clang_major__.__clang_minor__.__clang_patchlevel__
#elif defined(__GNUC__)
COMPILER gcc __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
#elif defined(__INTEL_COMPILER)
COMPILER icc __INTEL_COMPILER
#endif
EOF
read dummy compiler CC_VERSION <<EOF
$($CC -E $CPPFLAGS $CFLAGS conftest.c 2>/dev/null | grep COMPILER)
EOF
read dummy cxxcompiler CXX_VERSION <<EOF
$($CXX -E $CPPFLAGS $CXXFLAGS conftest.c 2>/dev/null | grep COMPILER)
EOF
if test "$compiler" != "$cxxcompiler"; then
AC_MSG_ERROR([Your C and C++ compilers are different. You need to use the same compiler.])
fi
if test "$CC_VERSION" != "$CXX_VERSION"; then
# This may not be strictly necessary, but if we want to drop it, we
# should make sure any version checks below apply to both the C and
# C++ compiler versions.
AC_MSG_ERROR([Your C and C++ compiler versions are different. You need to use the same compiler version.])
fi
CC_VERSION=`echo "$CC_VERSION" | sed 's/ //g'`
CXX_VERSION=`echo "$CXX_VERSION" | sed 's/ //g'`
if test "$compiler" = "gcc"; then
GNU_CC=1
GNU_CXX=1
changequote(<<,>>)
GCC_VERSION_FULL="$CXX_VERSION"
GCC_VERSION=`echo "$GCC_VERSION_FULL" | $PERL -pe '(split(/\./))[0]>=4&&s/(^\d*\.\d*).*/<<$>>1/;'`
GCC_MAJOR_VERSION=`echo ${GCC_VERSION} | $AWK -F\. '{ print <<$>>1 }'`
GCC_MINOR_VERSION=`echo ${GCC_VERSION} | $AWK -F\. '{ print <<$>>2 }'`
changequote([,])
fi
if test "`echo | $AS -o conftest.out -v 2>&1 | grep -c GNU`" != "0"; then
GNU_AS=1
fi
rm -f conftest.out
if test "`echo | $LD -v 2>&1 | grep -c GNU`" != "0"; then
GNU_LD=1
fi
if test "$compiler" = "msvc"; then
MSVC_VERSION_FULL="$CXX_VERSION"
CC_VERSION=`echo ${CC_VERSION} | cut -c 1-4`
CXX_VERSION=`echo ${CXX_VERSION} | cut -c 1-4`
fi
INTEL_CC=
INTEL_CXX=
if test "$compiler" = "icc"; then
INTEL_CC=1
INTEL_CXX=1
fi
CLANG_CC=
CLANG_CXX=
CLANG_CL=
if test "$compiler" = "clang"; then
GNU_CC=1
GNU_CXX=1
CLANG_CC=1
CLANG_CXX=1
fi
if test "$compiler" = "clang-cl"; then
CLANG_CL=1
# We force clang-cl to emulate Visual C++ 2013 in configure.in, but that
# is based on the CLANG_CL variable defined here, so make sure that we're
# getting the right version here manually.
CC_VERSION=1800
CXX_VERSION=1800
MSVC_VERSION_FULL=180030723
# Build on clang-cl with MSVC 2013 Update 3 with fallback emulation.
CFLAGS="$CFLAGS -fms-compatibility-version=18.00.30723 -fallback"
CXXFLAGS="$CXXFLAGS -fms-compatibility-version=18.00.30723 -fallback"
fi
if test "$GNU_CC"; then
if `$CC -print-prog-name=ld` -v 2>&1 | grep -c GNU >/dev/null; then
GCC_USE_GNU_LD=1
fi
fi
AC_SUBST(CLANG_CXX)
AC_SUBST(CLANG_CL)
if test -n "$GNU_CC" -a -z "$CLANG_CC" ; then
if test "$GCC_MAJOR_VERSION" -eq 4 -a "$GCC_MINOR_VERSION" -lt 7 ||
test "$GCC_MAJOR_VERSION" -lt 4; then
AC_MSG_ERROR([Only GCC 4.7 or newer supported])
fi
fi
])
AC_DEFUN([MOZ_CROSS_COMPILER],
[
echo "cross compiling from $host to $target"
_SAVE_CC="$CC"
_SAVE_CFLAGS="$CFLAGS"
_SAVE_LDFLAGS="$LDFLAGS"
AC_MSG_CHECKING([for host c compiler])
AC_CHECK_PROGS(HOST_CC, cc gcc clang cl, "")
if test -z "$HOST_CC"; then
AC_MSG_ERROR([no acceptable c compiler found in \$PATH])
fi
AC_MSG_RESULT([$HOST_CC])
AC_MSG_CHECKING([for host c++ compiler])
AC_CHECK_PROGS(HOST_CXX, c++ g++ clang++ cl, "")
if test -z "$HOST_CXX"; then
AC_MSG_ERROR([no acceptable c++ compiler found in \$PATH])
fi
AC_MSG_RESULT([$HOST_CXX])
if test -z "$HOST_CFLAGS"; then
HOST_CFLAGS="$CFLAGS"
fi
if test -z "$HOST_CXXFLAGS"; then
HOST_CXXFLAGS="$CXXFLAGS"
fi
if test -z "$HOST_LDFLAGS"; then
HOST_LDFLAGS="$LDFLAGS"
fi
if test -z "$HOST_AR_FLAGS"; then
HOST_AR_FLAGS="$AR_FLAGS"
fi
AC_CHECK_PROGS(HOST_RANLIB, $HOST_RANLIB ranlib, ranlib, :)
AC_CHECK_PROGS(HOST_AR, $HOST_AR ar, ar, :)
CC="$HOST_CC"
CFLAGS="$HOST_CFLAGS"
LDFLAGS="$HOST_LDFLAGS"
AC_MSG_CHECKING([whether the host c compiler ($HOST_CC $HOST_CFLAGS $HOST_LDFLAGS) works])
AC_TRY_COMPILE([], [return(0);],
[ac_cv_prog_hostcc_works=1 AC_MSG_RESULT([yes])],
AC_MSG_ERROR([installation or configuration problem: host compiler $HOST_CC cannot create executables.]) )
CC="$HOST_CXX"
CFLAGS="$HOST_CXXFLAGS"
AC_MSG_CHECKING([whether the host c++ compiler ($HOST_CXX $HOST_CXXFLAGS $HOST_LDFLAGS) works])
AC_TRY_COMPILE([], [return(0);],
[ac_cv_prog_hostcxx_works=1 AC_MSG_RESULT([yes])],
AC_MSG_ERROR([installation or configuration problem: host compiler $HOST_CXX cannot create executables.]) )
CC=$_SAVE_CC
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
AC_CHECK_PROGS(CC, "${target_alias}-gcc" "${target}-gcc", :)
unset ac_cv_prog_CC
AC_PROG_CC
AC_CHECK_PROGS(CXX, "${target_alias}-g++" "${target}-g++", :)
unset ac_cv_prog_CXX
AC_PROG_CXX
AC_CHECK_PROGS(RANLIB, "${target_alias}-ranlib" "${target}-ranlib", :)
AC_CHECK_PROGS(AR, "${target_alias}-ar" "${target}-ar", :)
AC_CHECK_PROGS(AS, "${target_alias}-as" "${target}-as", :)
AC_CHECK_PROGS(LD, "${target_alias}-ld" "${target}-ld", :)
AC_CHECK_PROGS(STRIP, "${target_alias}-strip" "${target}-strip", :)
AC_CHECK_PROGS(WINDRES, "${target_alias}-windres" "${target}-windres", :)
AC_CHECK_PROGS(OTOOL, "${target_alias}-otool" "${target}-otool", :)
AC_DEFINE(CROSS_COMPILE)
CROSS_COMPILE=1
dnl If we cross compile for ppc on Mac OS X x86, cross_compiling will
dnl dnl have erroneously been set to "no", because the x86 build host is
dnl dnl able to run ppc code in a translated environment, making a cross
dnl dnl compiler appear native. So we override that here.
cross_compiling=yes
])
AC_DEFUN([MOZ_CXX11],
[
dnl Check whether gcc's c++0x mode works
dnl Updates to the test below should be duplicated further below for the
dnl cross-compiling case.
AC_LANG_CPLUSPLUS
if test "$GNU_CXX"; then
CXXFLAGS="$CXXFLAGS -std=gnu++0x"
_ADDED_CXXFLAGS="-std=gnu++0x"
AC_CACHE_CHECK(for gcc c++0x headers bug without rtti,
ac_cv_cxx0x_headers_bug,
[AC_TRY_COMPILE([#include <memory>], [],
ac_cv_cxx0x_headers_bug="no",
ac_cv_cxx0x_headers_bug="yes")])
if test "$CLANG_CXX" -a "$ac_cv_cxx0x_headers_bug" = "yes"; then
CXXFLAGS="$CXXFLAGS -I$_topsrcdir/build/unix/headers"
_ADDED_CXXFLAGS="$_ADDED_CXXFLAGS -I$_topsrcdir/build/unix/headers"
AC_CACHE_CHECK(whether workaround for gcc c++0x headers conflict with clang works,
ac_cv_cxx0x_clang_workaround,
[AC_TRY_COMPILE([#include <memory>], [],
ac_cv_cxx0x_clang_workaround="yes",
ac_cv_cxx0x_clang_workaround="no")])
if test "ac_cv_cxx0x_clang_workaround" = "no"; then
AC_MSG_ERROR([Your toolchain does not support C++0x/C++11 mode properly. Please upgrade your toolchain])
fi
elif test "$ac_cv_cxx0x_headers_bug" = "yes"; then
AC_MSG_ERROR([Your toolchain does not support C++0x/C++11 mode properly. Please upgrade your toolchain])
fi
AC_CACHE_CHECK([whether 64-bits std::atomic requires -latomic],
ac_cv_needs_atomic,
AC_TRY_LINK(
[#include <cstdint>
#include <atomic>],
[ std::atomic<uint64_t> foo; foo = 1; ],
ac_cv_needs_atomic=no,
_SAVE_LIBS="$LIBS"
LIBS="$LIBS -latomic"
AC_TRY_LINK(
[#include <cstdint>
#include <atomic>],
[ std::atomic<uint64_t> foo; foo = 1; ],
ac_cv_needs_atomic=yes,
ac_cv_needs_atomic="do not know; assuming no")
LIBS="$_SAVE_LIBS"
)
)
if test "$ac_cv_needs_atomic" = yes; then
MOZ_NEEDS_LIBATOMIC=1
else
MOZ_NEEDS_LIBATOMIC=
fi
AC_SUBST(MOZ_NEEDS_LIBATOMIC)
fi
if test -n "$CROSS_COMPILE"; then
dnl When cross compile, we have no variable telling us what the host compiler is. Figure it out.
cat > conftest.C <<EOF
#if defined(__clang__)
COMPILER CLANG __clang_major__.__clang_minor__.__clang_patchlevel__
#elif defined(__GNUC__)
COMPILER GCC __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
#endif
EOF
read dummy host_compiler HOST_CC_VERSION <<EOF
$($HOST_CC -E conftest.C 2>/dev/null | grep COMPILER)
EOF
read dummy host_cxxcompiler HOST_CXX_VERSION <<EOF
$($HOST_CXX -E conftest.C 2>/dev/null | grep COMPILER)
EOF
rm conftest.C
if test "$host_compiler" != "$host_cxxcompiler"; then
AC_MSG_ERROR([Your C and C++ host compilers are different. You need to use the same compiler.])
fi
if test "$HOST_CC_VERSION" != "$HOST_CXX_VERSION"; then
# This may not be strictly necessary, but if we want to drop it,
# we should make sure any version checks below apply to both the
# C and C++ compiler versions.
AC_MSG_ERROR([Your C and C++ host compiler versions are different. You need to use the same compiler version.])
fi
if test -n "$host_compiler"; then
if test "$host_compiler" = "GCC" ; then
changequote(<<,>>)
HOST_GCC_VERSION_FULL="$HOST_CXX_VERSION"
HOST_GCC_VERSION=`echo "$HOST_GCC_VERSION_FULL" | $PERL -pe '(split(/\./))[0]>=4&&s/(^\d*\.\d*).*/<<$>>1/;'`
HOST_GCC_MAJOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>1 }'`
HOST_GCC_MINOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>2 }'`
changequote([,])
if test "$HOST_GCC_MAJOR_VERSION" -eq 4 -a "$HOST_GCC_MINOR_VERSION" -lt 7 ||
test "$HOST_GCC_MAJOR_VERSION" -lt 4; then
AC_MSG_ERROR([Only GCC 4.7 or newer supported for host compiler])
fi
fi
HOST_CXXFLAGS="$HOST_CXXFLAGS -std=gnu++0x"
_SAVE_CXXFLAGS="$CXXFLAGS"
_SAVE_CPPFLAGS="$CPPFLAGS"
_SAVE_CXX="$CXX"
CXXFLAGS="$HOST_CXXFLAGS"
CPPFLAGS="$HOST_CPPFLAGS"
CXX="$HOST_CXX"
AC_CACHE_CHECK(for host gcc c++0x headers bug without rtti,
ac_cv_host_cxx0x_headers_bug,
[AC_TRY_COMPILE([#include <memory>], [],
ac_cv_host_cxx0x_headers_bug="no",
ac_cv_host_cxx0x_headers_bug="yes")])
if test "$host_compiler" = CLANG -a "$ac_cv_host_cxx0x_headers_bug" = "yes"; then
CXXFLAGS="$CXXFLAGS -I$_topsrcdir/build/unix/headers"
AC_CACHE_CHECK(whether workaround for host gcc c++0x headers conflict with host clang works,
ac_cv_host_cxx0x_clang_workaround,
[AC_TRY_COMPILE([#include <memory>], [],
ac_cv_host_cxx0x_clang_workaround="yes",
ac_cv_host_cxx0x_clang_workaround="no")])
if test "ac_cv_host_cxx0x_clang_workaround" = "no"; then
AC_MSG_ERROR([Your host toolchain does not support C++0x/C++11 mode properly. Please upgrade your toolchain])
fi
HOST_CXXFLAGS="$CXXFLAGS"
elif test "$ac_cv_host_cxx0x_headers_bug" = "yes"; then
AC_MSG_ERROR([Your host toolchain does not support C++0x/C++11 mode properly. Please upgrade your toolchain])
fi
CXXFLAGS="$_SAVE_CXXFLAGS"
CPPFLAGS="$_SAVE_CPPFLAGS"
CXX="$_SAVE_CXX"
fi
elif test "$GNU_CXX"; then
HOST_CXXFLAGS="$HOST_CXXFLAGS $_ADDED_CXXFLAGS"
fi
AC_LANG_C
])