зеркало из https://github.com/mozilla/gecko-dev.git
297 строки
10 KiB
Plaintext
297 строки
10 KiB
Plaintext
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/.
|
|
|
|
dnl Add compiler specific options
|
|
|
|
AC_DEFUN([MOZ_DEFAULT_COMPILER],
|
|
[
|
|
dnl set DEVELOPER_OPTIONS early; MOZ_DEFAULT_COMPILER is usually the first non-setup directive
|
|
if test -z "$MOZILLA_OFFICIAL"; then
|
|
DEVELOPER_OPTIONS=1
|
|
fi
|
|
MOZ_ARG_ENABLE_BOOL(release,
|
|
[ --enable-release Build with more conservative, release engineering-oriented options.
|
|
This may slow down builds.],
|
|
DEVELOPER_OPTIONS=,
|
|
DEVELOPER_OPTIONS=1)
|
|
|
|
dnl Default to MSVC for win32 and gcc-4.2 for darwin
|
|
dnl ==============================================================
|
|
if test -z "$CROSS_COMPILE"; then
|
|
case "$target" in
|
|
*-mingw*)
|
|
if test -z "$CPP"; then CPP="$CC -E -nologo"; fi
|
|
if test -z "$CXXCPP"; then CXXCPP="$CXX -TP -E -nologo"; ac_cv_prog_CXXCPP="$CXXCPP"; fi
|
|
if test -z "$AS"; then
|
|
case "${target_cpu}" in
|
|
i*86)
|
|
AS=ml;
|
|
;;
|
|
x86_64)
|
|
AS=ml64;
|
|
;;
|
|
esac
|
|
fi
|
|
if test -z "$MIDL"; then MIDL=midl; fi
|
|
|
|
# need override this flag since we don't use $(LDFLAGS) for this.
|
|
if test -z "$HOST_LDFLAGS" ; then
|
|
HOST_LDFLAGS=" "
|
|
fi
|
|
;;
|
|
esac
|
|
fi
|
|
])
|
|
|
|
dnl ============================================================================
|
|
dnl C++ rtti
|
|
dnl We don't use it in the code, but it can be usefull for debugging, so give
|
|
dnl the user the option of enabling it.
|
|
dnl ============================================================================
|
|
AC_DEFUN([MOZ_RTTI],
|
|
[
|
|
MOZ_ARG_ENABLE_BOOL(cpp-rtti,
|
|
[ --enable-cpp-rtti Enable C++ RTTI ],
|
|
[ _MOZ_USE_RTTI=1 ],
|
|
[ _MOZ_USE_RTTI= ])
|
|
|
|
if test -z "$_MOZ_USE_RTTI"; then
|
|
if test "$GNU_CC"; then
|
|
CXXFLAGS="$CXXFLAGS -fno-rtti"
|
|
else
|
|
case "$target" in
|
|
*-mingw*)
|
|
CXXFLAGS="$CXXFLAGS -GR-"
|
|
esac
|
|
fi
|
|
fi
|
|
])
|
|
|
|
dnl ========================================================
|
|
dnl =
|
|
dnl = Debugging Options
|
|
dnl =
|
|
dnl ========================================================
|
|
AC_DEFUN([MOZ_DEBUGGING_OPTS],
|
|
[
|
|
|
|
if test -z "$MOZ_DEBUG" -o -n "$MOZ_ASAN"; then
|
|
MOZ_NO_DEBUG_RTL=1
|
|
fi
|
|
|
|
AC_SUBST(MOZ_NO_DEBUG_RTL)
|
|
|
|
MOZ_DEBUG_ENABLE_DEFS="DEBUG TRACING"
|
|
MOZ_ARG_WITH_STRING(debug-label,
|
|
[ --with-debug-label=LABELS
|
|
Define DEBUG_<value> for each comma-separated
|
|
value given.],
|
|
[ for option in `echo $withval | sed 's/,/ /g'`; do
|
|
MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS DEBUG_${option}"
|
|
done])
|
|
|
|
if test -n "$MOZ_DEBUG"; then
|
|
AC_MSG_CHECKING([for valid debug flags])
|
|
_SAVE_CFLAGS=$CFLAGS
|
|
CFLAGS="$CFLAGS $MOZ_DEBUG_FLAGS"
|
|
AC_TRY_COMPILE([#include <stdio.h>],
|
|
[printf("Hello World\n");],
|
|
_results=yes,
|
|
_results=no)
|
|
AC_MSG_RESULT([$_results])
|
|
if test "$_results" = "no"; then
|
|
AC_MSG_ERROR([These compiler flags are invalid: $MOZ_DEBUG_FLAGS])
|
|
fi
|
|
CFLAGS=$_SAVE_CFLAGS
|
|
|
|
MOZ_DEBUG_DEFINES="$MOZ_DEBUG_ENABLE_DEFS"
|
|
else
|
|
MOZ_DEBUG_DEFINES="NDEBUG TRIMMED"
|
|
fi
|
|
|
|
AC_SUBST_LIST(MOZ_DEBUG_DEFINES)
|
|
|
|
])
|
|
|
|
dnl A high level macro for selecting compiler options.
|
|
AC_DEFUN([MOZ_COMPILER_OPTS],
|
|
[
|
|
MOZ_DEBUGGING_OPTS
|
|
MOZ_RTTI
|
|
if test "$CLANG_CXX"; then
|
|
## We disable return-type-c-linkage because jsval is defined as a C++ type but is
|
|
## returned by C functions. This is possible because we use knowledge about the ABI
|
|
## to typedef it to a C type with the same layout when the headers are included
|
|
## from C.
|
|
_WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wno-unknown-warning-option -Wno-return-type-c-linkage"
|
|
fi
|
|
|
|
if test -n "$DEVELOPER_OPTIONS"; then
|
|
MOZ_FORCE_GOLD=1
|
|
fi
|
|
|
|
MOZ_ARG_ENABLE_BOOL(gold,
|
|
[ --enable-gold Enable GNU Gold Linker when it is not already the default],
|
|
MOZ_FORCE_GOLD=1,
|
|
MOZ_FORCE_GOLD=
|
|
)
|
|
|
|
if test "$GNU_CC" -a -n "$MOZ_FORCE_GOLD"; then
|
|
dnl if the default linker is BFD ld, check if gold is available and try to use it
|
|
dnl for local builds only.
|
|
if $CC -Wl,--version 2>&1 | grep -q "GNU ld"; then
|
|
GOLD=$($CC -print-prog-name=ld.gold)
|
|
case "$GOLD" in
|
|
/*)
|
|
;;
|
|
*)
|
|
GOLD=$(which $GOLD)
|
|
;;
|
|
esac
|
|
if test -n "$GOLD"; then
|
|
mkdir -p $_objdir/build/unix/gold
|
|
rm -f $_objdir/build/unix/gold/ld
|
|
ln -s "$GOLD" $_objdir/build/unix/gold/ld
|
|
if $CC -B $_objdir/build/unix/gold -Wl,--version 2>&1 | grep -q "GNU gold"; then
|
|
LDFLAGS="$LDFLAGS -B $_objdir/build/unix/gold"
|
|
else
|
|
rm -rf $_objdir/build/unix/gold
|
|
fi
|
|
fi
|
|
fi
|
|
fi
|
|
if test "$GNU_CC"; then
|
|
if $CC $LDFLAGS -Wl,--version 2>&1 | grep -q "GNU ld"; then
|
|
LD_IS_BFD=1
|
|
fi
|
|
fi
|
|
|
|
AC_SUBST([LD_IS_BFD])
|
|
|
|
if test "$GNU_CC"; then
|
|
if test -z "$DEVELOPER_OPTIONS"; then
|
|
CFLAGS="$CFLAGS -ffunction-sections -fdata-sections"
|
|
CXXFLAGS="$CXXFLAGS -ffunction-sections -fdata-sections"
|
|
fi
|
|
CFLAGS="$CFLAGS -fno-math-errno"
|
|
CXXFLAGS="$CXXFLAGS -fno-exceptions -fno-math-errno"
|
|
fi
|
|
|
|
dnl ========================================================
|
|
dnl = Identical Code Folding
|
|
dnl ========================================================
|
|
|
|
MOZ_ARG_DISABLE_BOOL(icf,
|
|
[ --disable-icf Disable Identical Code Folding],
|
|
MOZ_DISABLE_ICF=1,
|
|
MOZ_DISABLE_ICF= )
|
|
|
|
if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$MOZ_DISABLE_ICF" -a -z "$DEVELOPER_OPTIONS"; then
|
|
AC_CACHE_CHECK([whether the linker supports Identical Code Folding],
|
|
LD_SUPPORTS_ICF,
|
|
[echo 'int foo() {return 42;}' \
|
|
'int bar() {return 42;}' \
|
|
'int main() {return foo() - bar();}' > conftest.${ac_ext}
|
|
# If the linker supports ICF, foo and bar symbols will have
|
|
# the same address
|
|
if AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS -Wl,--icf=safe -ffunction-sections conftest.${ac_ext} $LIBS 1>&2]) &&
|
|
test -s conftest${ac_exeext} &&
|
|
objdump -t conftest${ac_exeext} | awk changequote(<<, >>)'{a[<<$>>6] = <<$>>1} END {if (a["foo"] && (a["foo"] != a["bar"])) { exit 1 }}'changequote([, ]); then
|
|
LD_SUPPORTS_ICF=yes
|
|
else
|
|
LD_SUPPORTS_ICF=no
|
|
fi
|
|
rm -rf conftest*])
|
|
if test "$LD_SUPPORTS_ICF" = yes; then
|
|
_SAVE_LDFLAGS="$LDFLAGS -Wl,--icf=safe"
|
|
LDFLAGS="$LDFLAGS -Wl,--icf=safe -Wl,--print-icf-sections"
|
|
AC_TRY_LINK([], [],
|
|
[LD_PRINT_ICF_SECTIONS=-Wl,--print-icf-sections],
|
|
[LD_PRINT_ICF_SECTIONS=])
|
|
AC_SUBST([LD_PRINT_ICF_SECTIONS])
|
|
LDFLAGS="$_SAVE_LDFLAGS"
|
|
fi
|
|
fi
|
|
|
|
dnl ========================================================
|
|
dnl = Automatically remove dead symbols
|
|
dnl ========================================================
|
|
|
|
if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$DEVELOPER_OPTIONS"; then
|
|
if test -n "$MOZ_DEBUG_FLAGS"; then
|
|
dnl See bug 670659
|
|
AC_CACHE_CHECK([whether removing dead symbols breaks debugging],
|
|
GC_SECTIONS_BREAKS_DEBUG_RANGES,
|
|
[echo 'int foo() {return 42;}' \
|
|
'int bar() {return 1;}' \
|
|
'int main() {return foo();}' > conftest.${ac_ext}
|
|
if AC_TRY_COMMAND([${CC-cc} -o conftest.${ac_objext} $CFLAGS $MOZ_DEBUG_FLAGS -c conftest.${ac_ext} 1>&2]) &&
|
|
AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS $MOZ_DEBUG_FLAGS -Wl,--gc-sections conftest.${ac_objext} $LIBS 1>&2]) &&
|
|
test -s conftest${ac_exeext} -a -s conftest.${ac_objext}; then
|
|
if test "`$PYTHON -m mozbuild.configure.check_debug_ranges conftest.${ac_objext} conftest.${ac_ext}`" = \
|
|
"`$PYTHON -m mozbuild.configure.check_debug_ranges conftest${ac_exeext} conftest.${ac_ext}`"; then
|
|
GC_SECTIONS_BREAKS_DEBUG_RANGES=no
|
|
else
|
|
GC_SECTIONS_BREAKS_DEBUG_RANGES=yes
|
|
fi
|
|
else
|
|
dnl We really don't expect to get here, but just in case
|
|
GC_SECTIONS_BREAKS_DEBUG_RANGES="no, but it's broken in some other way"
|
|
fi
|
|
rm -rf conftest*])
|
|
if test "$GC_SECTIONS_BREAKS_DEBUG_RANGES" = no; then
|
|
DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections"
|
|
fi
|
|
else
|
|
DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections"
|
|
fi
|
|
fi
|
|
|
|
# bionic in Android < 4.1 doesn't support PIE
|
|
# On OSX, the linker defaults to building PIE programs when targetting OSX 10.7+,
|
|
# but not when targetting OSX < 10.7. OSX < 10.7 doesn't support running PIE
|
|
# programs, so as long as support for OSX 10.6 is kept, we can't build PIE.
|
|
# Even after dropping 10.6 support, MOZ_PIE would not be useful since it's the
|
|
# default (and clang says the -pie option is not used).
|
|
# On other Unix systems, some file managers (Nautilus) can't start PIE programs
|
|
if test -n "$gonkdir" && test "$ANDROID_VERSION" -ge 16; then
|
|
MOZ_PIE=1
|
|
else
|
|
MOZ_PIE=
|
|
fi
|
|
|
|
MOZ_ARG_ENABLE_BOOL(pie,
|
|
[ --enable-pie Enable Position Independent Executables],
|
|
MOZ_PIE=1,
|
|
MOZ_PIE= )
|
|
|
|
if test "$GNU_CC" -a -n "$MOZ_PIE"; then
|
|
AC_MSG_CHECKING([for PIE support])
|
|
_SAVE_LDFLAGS=$LDFLAGS
|
|
LDFLAGS="$LDFLAGS -pie"
|
|
AC_TRY_LINK(,,AC_MSG_RESULT([yes])
|
|
[MOZ_PROGRAM_LDFLAGS="$MOZ_PROGRAM_LDFLAGS -pie"],
|
|
AC_MSG_RESULT([no])
|
|
AC_MSG_ERROR([--enable-pie requires PIE support from the linker.]))
|
|
LDFLAGS=$_SAVE_LDFLAGS
|
|
fi
|
|
|
|
AC_SUBST(MOZ_PROGRAM_LDFLAGS)
|
|
|
|
dnl ASan assumes no symbols are being interposed, and when that happens,
|
|
dnl it's not happy with it. Unconveniently, since Firefox is exporting
|
|
dnl libffi symbols and Gtk+3 pulls system libffi via libwayland-client,
|
|
dnl system libffi interposes libffi symbols that ASan assumes are in
|
|
dnl libxul, so it barfs about buffer overflows.
|
|
dnl Using -Wl,-Bsymbolic ensures no exported symbol can be interposed.
|
|
if test -n "$GCC_USE_GNU_LD"; then
|
|
case "$LDFLAGS" in
|
|
*-fsanitize=address*)
|
|
LDFLAGS="$LDFLAGS -Wl,-Bsymbolic"
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
])
|