mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-11-04 10:05:51 +00:00
427 lines
14 KiB
Plaintext
427 lines
14 KiB
Plaintext
dnl This Source Code Form is subject to the terms of the Mozilla Public
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dnl License, v. 2.0. If a copy of the MPL was not distributed with this
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dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
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dnl Add compiler specific options
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AC_DEFUN([MOZ_DEFAULT_COMPILER],
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[
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dnl set DEVELOPER_OPTIONS early; MOZ_DEFAULT_COMPILER is usually the first non-setup directive
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if test -z "$MOZILLA_OFFICIAL"; then
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DEVELOPER_OPTIONS=1
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fi
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MOZ_ARG_ENABLE_BOOL(release,
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[ --enable-release Build with more conservative, release engineering-oriented options.
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This may slow down builds.],
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DEVELOPER_OPTIONS=,
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DEVELOPER_OPTIONS=1)
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AC_SUBST(DEVELOPER_OPTIONS)
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dnl Default to MSVC for win32 and gcc-4.2 for darwin
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dnl ==============================================================
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if test -z "$CROSS_COMPILE"; then
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case "$target" in
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*-mingw*)
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if test -z "$CC"; then CC=cl; fi
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if test -z "$CXX"; then CXX=cl; fi
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if test -z "$CPP"; then CPP="$CC -E -nologo"; fi
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if test -z "$CXXCPP"; then CXXCPP="$CXX -TP -E -nologo"; ac_cv_prog_CXXCPP="$CXXCPP"; fi
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if test -z "$LD"; then LD=link; fi
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if test -z "$AS"; then
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case "${target_cpu}" in
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i*86)
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AS=ml;
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;;
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x86_64)
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AS=ml64;
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;;
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esac
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fi
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if test -z "$MIDL"; then MIDL=midl; fi
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# need override this flag since we don't use $(LDFLAGS) for this.
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if test -z "$HOST_LDFLAGS" ; then
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HOST_LDFLAGS=" "
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fi
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;;
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*-darwincomestojesus*)
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# GCC on darwin is based on gcc 4.2 and we don't support it anymore.
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# Hah! Just kidding!
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if test -z "$CC"; then
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MOZ_PATH_PROGS(CC, clang)
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fi
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if test -z "$CXX"; then
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MOZ_PATH_PROGS(CXX, clang++)
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fi
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IS_GCC=$($CC -v 2>&1 | grep gcc)
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if test -n "$IS_GCC"
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then
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echo gcc is known to be broken on OS X, please use clang.
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echo see http://developer.mozilla.org/en-US/docs/Developer_Guide/Build_Instructions/Mac_OS_X_Prerequisites
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echo for more information.
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exit 1
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fi
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;;
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esac
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fi
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])
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dnl ============================================================================
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dnl C++ rtti
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dnl We don't use it in the code, but it can be usefull for debugging, so give
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dnl the user the option of enabling it.
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dnl ============================================================================
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AC_DEFUN([MOZ_RTTI],
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[
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MOZ_ARG_ENABLE_BOOL(cpp-rtti,
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[ --enable-cpp-rtti Enable C++ RTTI ],
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[ _MOZ_USE_RTTI=1 ],
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[ _MOZ_USE_RTTI= ])
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if test -z "$_MOZ_USE_RTTI"; then
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if test "$GNU_CC"; then
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CXXFLAGS="$CXXFLAGS -fno-rtti"
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else
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case "$target" in
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*-mingw*)
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CXXFLAGS="$CXXFLAGS -GR-"
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esac
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fi
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fi
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])
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dnl ========================================================
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dnl =
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dnl = Debugging Options
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dnl =
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dnl ========================================================
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AC_DEFUN([MOZ_DEBUGGING_OPTS],
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[
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dnl Debug info is ON by default.
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if test -z "$MOZ_DEBUG_FLAGS"; then
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if test -n "$_MSC_VER"; then
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MOZ_DEBUG_FLAGS="-Zi"
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else
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MOZ_DEBUG_FLAGS="-gdwarf-2"
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fi
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fi
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AC_SUBST(MOZ_DEBUG_FLAGS)
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MOZ_ARG_ENABLE_STRING(debug,
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[ --enable-debug[=DBG] Enable building with developer debug info
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(using compiler flags DBG)],
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[ if test "$enableval" != "no"; then
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MOZ_DEBUG=1
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if test -n "$enableval" -a "$enableval" != "yes"; then
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MOZ_DEBUG_FLAGS=`echo $enableval | sed -e 's|\\\ | |g'`
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_MOZ_DEBUG_FLAGS_SET=1
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fi
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else
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MOZ_DEBUG=
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fi ],
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MOZ_DEBUG=)
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if test -z "$MOZ_DEBUG" -o -n "$MOZ_ASAN"; then
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MOZ_NO_DEBUG_RTL=1
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fi
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AC_SUBST(MOZ_NO_DEBUG_RTL)
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MOZ_DEBUG_ENABLE_DEFS="-DDEBUG -DTRACING"
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MOZ_ARG_WITH_STRING(debug-label,
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[ --with-debug-label=LABELS
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Define DEBUG_<value> for each comma-separated
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value given.],
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[ for option in `echo $withval | sed 's/,/ /g'`; do
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MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${option}"
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done])
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if test -n "$MOZ_DEBUG"; then
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AC_MSG_CHECKING([for valid debug flags])
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_SAVE_CFLAGS=$CFLAGS
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CFLAGS="$CFLAGS $MOZ_DEBUG_FLAGS"
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AC_TRY_COMPILE([#include <stdio.h>],
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[printf("Hello World\n");],
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_results=yes,
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_results=no)
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AC_MSG_RESULT([$_results])
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if test "$_results" = "no"; then
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AC_MSG_ERROR([These compiler flags are invalid: $MOZ_DEBUG_FLAGS])
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fi
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CFLAGS=$_SAVE_CFLAGS
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MOZ_DEBUG_DEFINES="$MOZ_DEBUG_ENABLE_DEFS"
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else
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MOZ_DEBUG_DEFINES="-DNDEBUG -DTRIMMED"
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fi
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AC_SUBST(MOZ_DEBUG_DEFINES)
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dnl ========================================================
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dnl = Enable generation of debug symbols
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dnl ========================================================
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MOZ_ARG_ENABLE_STRING(debug-symbols,
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[ --enable-debug-symbols[=DBG]
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Enable debugging symbols (using compiler flags DBG)],
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[ if test "$enableval" != "no"; then
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MOZ_DEBUG_SYMBOLS=1
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if test -n "$enableval" -a "$enableval" != "yes"; then
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if test -z "$_MOZ_DEBUG_FLAGS_SET"; then
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MOZ_DEBUG_FLAGS=`echo $enableval | sed -e 's|\\\ | |g'`
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else
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AC_MSG_ERROR([--enable-debug-symbols flags cannot be used with --enable-debug flags])
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fi
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fi
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else
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MOZ_DEBUG_SYMBOLS=
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fi ],
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MOZ_DEBUG_SYMBOLS=1)
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if test -n "$MOZ_DEBUG" -o -n "$MOZ_DEBUG_SYMBOLS"; then
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AC_DEFINE(MOZ_DEBUG_SYMBOLS)
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export MOZ_DEBUG_SYMBOLS
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fi
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])
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dnl A high level macro for selecting compiler options.
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AC_DEFUN([MOZ_COMPILER_OPTS],
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[
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MOZ_DEBUGGING_OPTS
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MOZ_RTTI
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if test "$CLANG_CXX"; then
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## We disable return-type-c-linkage because jsval is defined as a C++ type but is
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## returned by C functions. This is possible because we use knowledge about the ABI
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## to typedef it to a C type with the same layout when the headers are included
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## from C.
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_WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wno-unknown-warning-option -Wno-return-type-c-linkage"
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fi
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AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) actually is a C++ compiler])
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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_SAVE_LIBS=$LIBS
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LIBS=
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AC_TRY_LINK([#include <new>], [int *foo = new int;],,
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([$CXX $CXXFLAGS $LDFLAGS failed to compile and link a simple C++ source.]))
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LIBS=$_SAVE_LIBS
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AC_LANG_RESTORE
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AC_MSG_RESULT([yes])
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if test -n "$DEVELOPER_OPTIONS"; then
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MOZ_FORCE_GOLD=1
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fi
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MOZ_ARG_ENABLE_BOOL(gold,
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[ --enable-gold Enable GNU Gold Linker when it is not already the default],
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MOZ_FORCE_GOLD=1,
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MOZ_FORCE_GOLD=
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)
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if test "$GNU_CC" -a -n "$MOZ_FORCE_GOLD"; then
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dnl if the default linker is BFD ld, check if gold is available and try to use it
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dnl for local builds only.
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if $CC -Wl,--version 2>&1 | grep -q "GNU ld"; then
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GOLD=$($CC -print-prog-name=ld.gold)
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case "$GOLD" in
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/*)
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;;
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*)
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GOLD=$(which $GOLD)
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;;
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esac
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if test -n "$GOLD"; then
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mkdir -p $_objdir/build/unix/gold
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rm -f $_objdir/build/unix/gold/ld
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ln -s "$GOLD" $_objdir/build/unix/gold/ld
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if $CC -B $_objdir/build/unix/gold -Wl,--version 2>&1 | grep -q "GNU gold"; then
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LDFLAGS="$LDFLAGS -B $_objdir/build/unix/gold"
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else
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rm -rf $_objdir/build/unix/gold
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fi
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fi
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fi
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fi
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if test "$GNU_CC"; then
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if $CC $LDFLAGS -Wl,--version 2>&1 | grep -q "GNU ld"; then
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LD_IS_BFD=1
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fi
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fi
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AC_SUBST([LD_IS_BFD])
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if test "$GNU_CC"; then
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if test -z "$DEVELOPER_OPTIONS"; then
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CFLAGS="$CFLAGS -ffunction-sections -fdata-sections"
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CXXFLAGS="$CXXFLAGS -ffunction-sections -fdata-sections"
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fi
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CFLAGS="$CFLAGS -fno-math-errno"
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CXXFLAGS="$CXXFLAGS -fno-exceptions -fno-math-errno"
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fi
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dnl ========================================================
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dnl = Identical Code Folding
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dnl ========================================================
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MOZ_ARG_DISABLE_BOOL(icf,
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[ --disable-icf Disable Identical Code Folding],
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MOZ_DISABLE_ICF=1,
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MOZ_DISABLE_ICF= )
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if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$MOZ_DISABLE_ICF" -a -z "$DEVELOPER_OPTIONS"; then
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AC_CACHE_CHECK([whether the linker supports Identical Code Folding],
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LD_SUPPORTS_ICF,
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[echo 'int foo() {return 42;}' \
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'int bar() {return 42;}' \
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'int main() {return foo() - bar();}' > conftest.${ac_ext}
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# If the linker supports ICF, foo and bar symbols will have
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# the same address
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if AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS -Wl,--icf=safe -ffunction-sections conftest.${ac_ext} $LIBS 1>&2]) &&
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test -s conftest${ac_exeext} &&
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objdump -t conftest${ac_exeext} | awk changequote(<<, >>)'{a[<<$>>6] = <<$>>1} END {if (a["foo"] && (a["foo"] != a["bar"])) { exit 1 }}'changequote([, ]); then
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LD_SUPPORTS_ICF=yes
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else
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LD_SUPPORTS_ICF=no
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fi
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rm -rf conftest*])
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if test "$LD_SUPPORTS_ICF" = yes; then
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_SAVE_LDFLAGS="$LDFLAGS -Wl,--icf=safe"
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LDFLAGS="$LDFLAGS -Wl,--icf=safe -Wl,--print-icf-sections"
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AC_TRY_LINK([], [],
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[LD_PRINT_ICF_SECTIONS=-Wl,--print-icf-sections],
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[LD_PRINT_ICF_SECTIONS=])
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AC_SUBST([LD_PRINT_ICF_SECTIONS])
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LDFLAGS="$_SAVE_LDFLAGS"
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fi
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fi
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dnl ========================================================
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dnl = Automatically remove dead symbols
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dnl ========================================================
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if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$DEVELOPER_OPTIONS"; then
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if test -n "$MOZ_DEBUG_FLAGS"; then
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dnl See bug 670659
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AC_CACHE_CHECK([whether removing dead symbols breaks debugging],
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GC_SECTIONS_BREAKS_DEBUG_RANGES,
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[echo 'int foo() {return 42;}' \
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'int bar() {return 1;}' \
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'int main() {return foo();}' > conftest.${ac_ext}
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if AC_TRY_COMMAND([${CC-cc} -o conftest.${ac_objext} $CFLAGS $MOZ_DEBUG_FLAGS -c conftest.${ac_ext} 1>&2]) &&
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AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS $MOZ_DEBUG_FLAGS -Wl,--gc-sections conftest.${ac_objext} $LIBS 1>&2]) &&
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test -s conftest${ac_exeext} -a -s conftest.${ac_objext}; then
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if test "`$PYTHON -m mozbuild.configure.check_debug_ranges conftest.${ac_objext} conftest.${ac_ext}`" = \
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"`$PYTHON -m mozbuild.configure.check_debug_ranges conftest${ac_exeext} conftest.${ac_ext}`"; then
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GC_SECTIONS_BREAKS_DEBUG_RANGES=no
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else
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GC_SECTIONS_BREAKS_DEBUG_RANGES=yes
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fi
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else
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dnl We really don't expect to get here, but just in case
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GC_SECTIONS_BREAKS_DEBUG_RANGES="no, but it's broken in some other way"
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fi
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rm -rf conftest*])
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if test "$GC_SECTIONS_BREAKS_DEBUG_RANGES" = no; then
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DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections"
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fi
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else
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DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections"
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fi
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fi
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# bionic in Android < 4.1 doesn't support PIE
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# On OSX, the linker defaults to building PIE programs when targetting OSX 10.7+,
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# but not when targetting OSX < 10.7. OSX < 10.7 doesn't support running PIE
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# programs, so as long as support for OSX 10.6 is kept, we can't build PIE.
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# Even after dropping 10.6 support, MOZ_PIE would not be useful since it's the
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# default (and clang says the -pie option is not used).
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# On other Unix systems, some file managers (Nautilus) can't start PIE programs
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if test -n "$gonkdir" && test "$ANDROID_VERSION" -ge 16; then
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MOZ_PIE=1
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else
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MOZ_PIE=
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fi
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MOZ_ARG_ENABLE_BOOL(pie,
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[ --enable-pie Enable Position Independent Executables],
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MOZ_PIE=1,
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MOZ_PIE= )
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if test "$GNU_CC" -a -n "$MOZ_PIE"; then
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AC_MSG_CHECKING([for PIE support])
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_SAVE_LDFLAGS=$LDFLAGS
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LDFLAGS="$LDFLAGS -pie"
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AC_TRY_LINK(,,AC_MSG_RESULT([yes])
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[MOZ_PROGRAM_LDFLAGS="$MOZ_PROGRAM_LDFLAGS -pie"],
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([--enable-pie requires PIE support from the linker.]))
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LDFLAGS=$_SAVE_LDFLAGS
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fi
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AC_SUBST(MOZ_PROGRAM_LDFLAGS)
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dnl ASan assumes no symbols are being interposed, and when that happens,
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dnl it's not happy with it. Unconveniently, since Firefox is exporting
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dnl libffi symbols and Gtk+3 pulls system libffi via libwayland-client,
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dnl system libffi interposes libffi symbols that ASan assumes are in
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dnl libxul, so it barfs about buffer overflows.
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dnl Using -Wl,-Bsymbolic ensures no exported symbol can be interposed.
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if test -n "$GCC_USE_GNU_LD"; then
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case "$LDFLAGS" in
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*-fsanitize=address*)
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LDFLAGS="$LDFLAGS -Wl,-Bsymbolic"
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;;
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esac
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fi
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])
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dnl GCC and clang will fail if given an unknown warning option like -Wfoobar.
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dnl But later versions won't fail if given an unknown negated warning option
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dnl like -Wno-foobar. So when we are check for support of negated warning
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dnl options, we actually test the positive form, but add the negated form to
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dnl the flags variable.
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AC_DEFUN([MOZ_C_SUPPORTS_WARNING],
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[
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AC_CACHE_CHECK(whether the C compiler supports $1$2, $3,
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|
[
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AC_LANG_SAVE
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AC_LANG_C
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_SAVE_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror -W$2"
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AC_TRY_COMPILE([],
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[return(0);],
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$3="yes",
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$3="no")
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CFLAGS="$_SAVE_CFLAGS"
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AC_LANG_RESTORE
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])
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if test "${$3}" = "yes"; then
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_WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} $1$2"
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fi
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])
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AC_DEFUN([MOZ_CXX_SUPPORTS_WARNING],
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[
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AC_CACHE_CHECK(whether the C++ compiler supports $1$2, $3,
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[
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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_SAVE_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS -Werror -W$2"
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AC_TRY_COMPILE([],
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[return(0);],
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$3="yes",
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$3="no")
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CXXFLAGS="$_SAVE_CXXFLAGS"
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AC_LANG_RESTORE
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|
])
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if test "${$3}" = "yes"; then
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_WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} $1$2"
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fi
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|
])
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