--- net-libs/xulrunner/xulrunner-1.9.1.2-r1.ebuild	2009-08-20 13:37:02.000000000 +0200
+++ net-libs/xulrunner/xulrunner-1.9.1.2-r1.ebuild	2009-08-20 14:52:10.000000000 +0200
@@ -21,7 +21,7 @@
 KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86"
 SLOT="1.9"
 LICENSE="|| ( MPL-1.1 GPL-2 LGPL-2.1 )"
-IUSE="+alsa debug python" # qt-experimental
+IUSE="+alsa debug pgo python" # qt-experimental
 
 #	qt-experimental? (
 #		x11-libs/qt-gui
@@ -29,6 +29,7 @@
 
 # nspr-4.8 due to BMO #499144
 RDEPEND="java? ( >=virtual/jre-1.4 )
+	pgo? ( >=sys-devel/gcc-4.4.1 )
 	>=dev-lang/python-2.3[threads]
 	>=sys-devel/binutils-2.16.1
 	>=dev-libs/nss-3.12.3
@@ -61,6 +62,7 @@
 	EPATCH_SUFFIX="patch" \
 	EPATCH_FORCE="yes" \
 	epatch "${WORKDIR}"
+	use pgo && epatch "${FILESDIR}/gcc44-pgo.diff"
 
 	# Same as in config/autoconf.mk.in
 	MOZLIBDIR="/usr/$(get_libdir)/${PN}-${MAJ_PV}"
@@ -149,6 +151,12 @@
 	mozconfig_annotate '' --enable-xpctools
 	mozconfig_annotate '' --with-default-mozilla-five-home="${MOZLIBDIR}"
 
+	# enable profile guided optimization
+	if use pgo; then
+		echo "mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/xul-opt" >> .mozconfig
+		echo "mk_add_options PROFILE_GEN_SCRIPT='\$(PYTHON) \$(OBJDIR)/_profile/pgo/profileserver.py'" >> .mozconfig
+	fi
+
 	# Disable/Enable audio support based on USE
 	mozconfig_use_enable alsa ogg
 	mozconfig_use_enable alsa wave
@@ -186,7 +194,18 @@
 	sed -i -e "s:/usr/lib/mozilla/plugins:/usr/$(get_libdir)/nsbrowser/plugins:" \
 		"${S}"/xpcom/io/nsAppFileLocationProvider.cpp || die "sed failed to replace plugin path!"
 
-	CC="$(tc-getCC)" CXX="$(tc-getCXX)" LD="$(tc-getLD)" econf
+	# without econf we need these
+	mozconfig_annotate '' --prefix=/usr
+	mozconfig_annotate '' --libdir=/usr/$(get_libdir)
+}
+
+src_compile() {
+	# profile guided optimization
+	local pgo=""
+	use pgo && pgo="-j1 profiledbuild"
+
+	CC="$(tc-getCC)" CXX="$(tc-getCXX)" LD="$(tc-getLD)" \
+	emake -f client.mk ${pgo} || die "emake failed"
 }
 
 src_install() {
--- /dev/null	2009-08-14 03:35:21.951203010 +0200
+++ net-libs/xulrunner/files/gcc44-pgo.diff	2009-08-20 13:58:42.000000000 +0200
@@ -0,0 +1,56 @@
+--- configure.in.orig	2009-07-30 17:30:11.000000000 +0200
++++ configure.in	2009-08-20 13:55:08.000000000 +0200
+@@ -7013,18 +7013,18 @@
+ AC_SUBST(MOZ_PROFILE_GUIDED_OPTIMIZE_DISABLE)
+ 
+ _SAVE_CFLAGS="$CFLAGS"
+-CFLAGS="$CFLAGS -fprofile-generate"
++CFLAGS="$CFLAGS -fprofile-generate -fprofile-correction"
+ 
+ AC_MSG_CHECKING([whether C compiler supports -fprofile-generate])
+ AC_TRY_COMPILE([], [return 0;],
+-               [ PROFILE_GEN_CFLAGS="-fprofile-generate"
++               [ PROFILE_GEN_CFLAGS="-fprofile-generate -fprofile-correction"
+                  result="yes" ], result="no")
+ AC_MSG_RESULT([$result])
+ 
+ if test $result = "yes"; then
+   PROFILE_GEN_LDFLAGS="-fprofile-generate"
+-  PROFILE_USE_CFLAGS="-fprofile-use"
+-  PROFILE_USE_LDFLAGS="-fprofile-use"
++  PROFILE_USE_CFLAGS="-fprofile-use -fprofile-correction"
++  PROFILE_USE_LDFLAGS="-fprofile-use -fprofile-correction"
+ else
+   CFLAGS="$_SAVE_CFLAGS -fprofile-arcs"
+   AC_MSG_CHECKING([whether C compiler supports -fprofile-arcs])
+--- configure.orig	2009-08-20 13:56:05.000000000 +0200
++++ configure	2009-08-20 13:58:17.000000000 +0200
+@@ -18739,7 +18739,7 @@
+ 
+ 
+ _SAVE_CFLAGS="$CFLAGS"
+-CFLAGS="$CFLAGS -fprofile-generate"
++CFLAGS="$CFLAGS -fprofile-generate -fprofile-correction"
+ 
+ echo $ac_n "checking whether C compiler supports -fprofile-generate""... $ac_c" 1>&6
+ echo "configure:18746: checking whether C compiler supports -fprofile-generate" >&5
+@@ -18753,7 +18753,7 @@
+ EOF
+ if { (eval echo configure:18755: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+   rm -rf conftest*
+-   PROFILE_GEN_CFLAGS="-fprofile-generate"
++   PROFILE_GEN_CFLAGS="-fprofile-generate -fprofile-correction"
+                  result="yes" 
+ else
+   echo "configure: failed program was:" >&5
+@@ -18766,8 +18766,8 @@
+ 
+ if test $result = "yes"; then
+   PROFILE_GEN_LDFLAGS="-fprofile-generate"
+-  PROFILE_USE_CFLAGS="-fprofile-use"
+-  PROFILE_USE_LDFLAGS="-fprofile-use"
++  PROFILE_USE_CFLAGS="-fprofile-use -fprofile-correction"
++  PROFILE_USE_LDFLAGS="-fprofile-use -fprofile-correction"
+ else
+   CFLAGS="$_SAVE_CFLAGS -fprofile-arcs"
+   echo $ac_n "checking whether C compiler supports -fprofile-arcs""... $ac_c" 1>&6