Add m-esr52 at 52.6.0

1 files changed, 316 insertions, 0 deletions

diff --git a/build/autoconf/compiler-opts.m4 b/build/autoconf/compiler-opts.m4
new file mode 100644
index 000000000..5e495e107
--- /dev/null
+++ b/build/autoconf/compiler-opts.m4
@@ -0,0 +1,316 @@
+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
+    if test -n "$COMPILE_ENVIRONMENT"; then
+        AC_MSG_CHECKING([for valid debug flags])
+        _SAVE_CFLAGS=$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
+    fi
+
+    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="$CXXFLAGS -fno-exceptions -fno-math-errno"
+
+    if test -z "$CLANG_CC"; then
+        case "$CC_VERSION" in
+        4.*)
+            ;;
+        *)
+            # Lifetime Dead Store Elimination level 2 (default in GCC6+) breaks Gecko.
+            # Ideally, we'd use -flifetime-dse=1, but that means we'd forcefully
+            # enable it on optimization levels where it would otherwise not be enabled.
+            # So we disable it entirely. But since that would mean inconsistency with
+            # GCC5, which has level 1 depending on optimization level, disable it on
+            # GCC5 as well, because better safe than sorry.
+            # Add it first so that a mozconfig can override by setting CFLAGS/CXXFLAGS.
+            CFLAGS="-fno-lifetime-dse $CFLAGS"
+            CXXFLAGS="-fno-lifetime-dse $CXXFLAGS"
+            ;;
+        esac
+    fi
+fi
+
+dnl ========================================================
+dnl = Identical Code Folding
+dnl ========================================================
+
+MOZ_ARG_DISABLE_BOOL(icf,
+[  --disable-icf          Disable Identical Code Folding],
+    MOZ_DISABLE_ICF=1,
+    MOZ_DISABLE_ICF= )
+
+if test "$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 $DSO_PIC_CFLAGS -pie"
+    AC_TRY_LINK(,,AC_MSG_RESULT([yes])
+                  [MOZ_PROGRAM_LDFLAGS="$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
+
+])