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-rw-r--r--m4/libxul.m4149
1 files changed, 140 insertions, 9 deletions
diff --git a/m4/libxul.m4 b/m4/libxul.m4
index 16cf0d448..68049030c 100644
--- a/m4/libxul.m4
+++ b/m4/libxul.m4
@@ -31,14 +31,18 @@
AC_DEFUN([LIBXUL_INIT],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
-PKG_CHECK_MODULES([LIBXUL],[libxul],[libxul_cv_have_libxul=yes],[libxul_cv_have_libxul=no])
+PKG_CHECK_EXISTS([libxul],[libxul_cv_have_libxul=yes],[libxul_cv_have_libxul=no])
if test "$libxul_cv_have_libxul" != "yes"; then
AC_MSG_ERROR([libxul not found])
fi
libxul_cv_prefix="$($PKG_CONFIG --variable=prefix libxul)"
libxul_cv_include_root="$($PKG_CONFIG --variable=includedir libxul)"
-libxul_cv_libdir="$($PKG_CONFIG --variable=sdkdir libxul)"
+libxul_cv_sdkdir="$($PKG_CONFIG --variable=sdkdir libxul)"
+
+# FIXMEchpe: this isn't right. The pc file seems buggy, but until
+# I can figure this out, do it like this:
+libxul_cv_libdir="$(readlink $($PKG_CONFIG --variable=sdkdir libxul)/bin)"
libxul_cv_includes="-I${libxul_cv_include_root}/stable -I${libxul_cv_include_root}/unstable"
@@ -49,17 +53,23 @@ LIBXUL_INCLUDE_ROOT="$libxul_cv_include_root"
LIBXUL_INCLUDES="$libxul_cv_includes"
LIBXUL_LIBDIR="$libxul_cv_libdir"
-# **************************************************************
-# This is really gcc-only
-# Do this test using CXX only since some versions of gcc
-# 2.95-2.97 have a signed wchar_t in c++ only and some versions
-# only have short-wchar support for c++.
-# **************************************************************
-
LIBXUL_CXXCPPFLAGS=
LIBXUL_CXXFLAGS=
LIBXUL_LDFLAGS=
+# Can't use the value from the .pc file, since it seems buggy
+# Until I can figure it out, do this instead
+LIBXUL_LIBS="-L${libxul_cv_sdkdir}/lib -lxpcomglue_s -L${libxul_cv_sdkdir}/bin -lxul -lxpcom"
+
+# ***********************
+# Check for -fshort-wchar
+# ***********************
+
+# NOTE: This is really gcc-only
+# Do this test using CXX only since some versions of gcc
+# 2.95-2.97 have a signed wchar_t in c++ only and some versions
+# only have short-wchar support for c++.
+
AC_LANG_PUSH([C++])
_SAVE_CXXFLAGS=$CXXFLAGS
@@ -130,6 +140,127 @@ if test "$libxul_cv_have_debug" = "yes"; then
AC_DEFINE([HAVE_LIBXUL_DEBUG],[1],[Define if libxul is a debug build])
fi
+# *************************************
+# Check for C++ symbol visibility stuff
+# *************************************
+
+# Check for .hidden assembler directive and visibility attribute.
+# Copied from mozilla's configure.in, which in turn was
+# borrowed from glibc's configure.in
+
+# Only do this for g++
+
+if test "$GXX" = "yes"; then
+ AC_CACHE_CHECK(for visibility(hidden) attribute,
+ libxul_cv_visibility_hidden,
+ [cat > conftest.c <<EOF
+ int foo __attribute__ ((visibility ("hidden"))) = 1;
+EOF
+ libxul_cv_visibility_hidden=no
+ if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
+ if egrep '\.(hidden|private_extern).*foo' conftest.s >/dev/null; then
+ libxul_cv_visibility_hidden=yes
+ fi
+ fi
+ rm -f conftest.[cs]
+ ])
+ if test "$libxul_cv_visibility_hidden" = "yes"; then
+ AC_DEFINE([HAVE_VISIBILITY_HIDDEN_ATTRIBUTE],[1],[Define if the compiler supports the "hidden" visibility attribute])
+
+ AC_CACHE_CHECK(for visibility(default) attribute,
+ libxul_cv_visibility_default,
+ [cat > conftest.c <<EOF
+ int foo __attribute__ ((visibility ("default"))) = 1;
+EOF
+ libxul_cv_visibility_default=no
+ if ${CC-cc} -fvisibility=hidden -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
+ if ! egrep '\.(hidden|private_extern).*foo' conftest.s >/dev/null; then
+ libxul_cv_visibility_default=yes
+ fi
+ fi
+ rm -f conftest.[cs]
+ ])
+ if test "$libxul_cv_visibility_default" = "yes"; then
+ AC_DEFINE([HAVE_VISIBILITY_ATTRIBUTE],[1],[Define if the compiler supports the "default" visibility attribute])
+
+ AC_CACHE_CHECK(for visibility pragma support,
+ libxul_cv_visibility_pragma,
+ [cat > conftest.c <<EOF
+#pragma GCC visibility push(hidden)
+ int foo_hidden = 1;
+#pragma GCC visibility push(default)
+ int foo_default = 1;
+EOF
+ libxul_cv_visibility_pragma=no
+ if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
+ if egrep '\.(hidden|private_extern).*foo_hidden' conftest.s >/dev/null; then
+ if ! egrep '\.(hidden|private_extern).*foo_default' conftest.s > /dev/null; then
+ libxul_cv_visibility_pragma=yes
+ fi
+ fi
+ fi
+ rm -f conftest.[cs]
+ ])
+ if test "$libxul_cv_visibility_pragma" = "yes"; then
+ AC_CACHE_CHECK(For gcc visibility bug with class-level attributes (GCC bug 26905),
+ libxul_cv_have_visibility_class_bug,
+ [cat > conftest.c <<EOF
+#pragma GCC visibility push(hidden)
+struct __attribute__ ((visibility ("default"))) TestStruct {
+ static void Init();
+};
+__attribute__ ((visibility ("default"))) void TestFunc() {
+ TestStruct::Init();
+}
+EOF
+ libxul_cv_have_visibility_class_bug=no
+ if ! ${CXX-g++} ${CXXFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -S -o conftest.S conftest.c > /dev/null 2>&1 ; then
+ libxul_cv_have_visibility_class_bug=yes
+ else
+ if test `egrep -c '@PLT|\\$stub' conftest.S` = 0; then
+ libxul_cv_have_visibility_class_bug=yes
+ fi
+ fi
+ rm -rf conftest.{c,S}
+ ])
+
+ AC_CACHE_CHECK(For x86_64 gcc visibility bug with builtins (GCC bug 20297),
+ libxul_cv_have_visibility_builtin_bug,
+ [cat > conftest.c <<EOF
+#pragma GCC visibility push(hidden)
+#pragma GCC visibility push(default)
+#include <string.h>
+#pragma GCC visibility pop
+
+__attribute__ ((visibility ("default"))) void Func() {
+ char c[[100]];
+ memset(c, 0, sizeof(c));
+}
+EOF
+ libxul_cv_have_visibility_builtin_bug=no
+ if ! ${CC-cc} ${CFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -O2 -S -o conftest.S conftest.c > /dev/null 2>&1 ; then
+ libxul_cv_have_visibility_builtin_bug=yes
+ else
+ if test `grep -c "@PLT" conftest.S` = 0; then
+ libxul_cv_visibility_builtin_bug=yes
+ fi
+ fi
+ rm -f conftest.{c,S}
+ ])
+ if test "$libxul_cv_have_visibility_builtin_bug" = "no" -a \
+ "$libxul_cv_have_visibility_class_bug" = "no"; then
+ VISIBILITY_FLAGS='-I$(DIST)/include/system_wrappers -include $(topsrcdir)/config/gcc_hidden.h'
+ WRAP_SYSTEM_INCLUDES=1
+ else
+ VISIBILITY_FLAGS='-fvisibility=hidden'
+ fi # have visibility pragma bug
+ fi # have visibility pragma
+ fi # have visibility(default) attribute
+ fi # have visibility(hidden) attribute
+
+ LIBXUL_CXXFLAGS="$LIBXUL_CXXFLAGS $VISIBILITY_FLAGS"
+fi # g++
+
# *********
# Finish up
# *********