Mesa (master): automake: check if the linker supports --dynamic-list

[Emil Velikov]

Module: Mesa
Branch: master
Commit: 635477dc4b9579dac2fc0fb332dcf2e0e48dd418
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=635477dc4b9579dac2fc0fb332dcf2e0e48dd418

Author: Jonathan Gray <jsg at jsg.id.au>
Date:   Tue Sep  2 02:08:00 2014 +1000

automake: check if the linker supports --dynamic-list

As older versions of gnu ld did not support --dynamic-list check to see
if it is supported before using it.  Non gnu linkers such the apple one
likely lack this option as well.

Fixes the build on OpenBSD which has binutils 2.15 and 2.17.
The --dynamic-list option seems to been have introduced sometime after
binutils 2.17 was released as it is present in 2.18.

Cc: mesa-stable at lists.freedesktop.org
Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>

---

 configure.ac                          |   18 ++++++++++++++++++
 src/gallium/targets/dri/Makefile.am   |    6 +++++-
 src/gallium/targets/vdpau/Makefile.am |    6 +++++-
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9d2ddb4..f7525fe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -358,6 +358,24 @@ LDFLAGS=$save_LDFLAGS
 AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
 
 dnl
+dnl Check if linker supports dynamic list files
+dnl
+AC_MSG_CHECKING([if the linker supports --dynamic-list])
+save_LDFLAGS=$LDFLAGS
+LDFLAGS="$LDFLAGS -Wl,--dynamic-list=conftest.dyn"
+cat > conftest.dyn <<EOF
+{
+	radeon_drm_winsys_create;
+};
+EOF
+AC_LINK_IFELSE(
+    [AC_LANG_SOURCE([int main() { return 0;}])],
+    [have_ld_dynamic_list=yes;AC_MSG_RESULT(yes)],
+    [have_ld_dynamic_list=no; AC_MSG_RESULT(no)])
+LDFLAGS=$save_LDFLAGS
+AM_CONDITIONAL(HAVE_LD_DYNAMIC_LIST, test "$have_ld_dynamic_list" = "yes")
+
+dnl
 dnl compatibility symlinks
 dnl
 case "$host_os" in
diff --git a/src/gallium/targets/dri/Makefile.am b/src/gallium/targets/dri/Makefile.am
index 70b19b8..1c33a91 100644
--- a/src/gallium/targets/dri/Makefile.am
+++ b/src/gallium/targets/dri/Makefile.am
@@ -26,7 +26,6 @@ gallium_dri_la_LDFLAGS = \
 	-shrext .so \
 	-module \
 	-avoid-version \
-	-Wl,--dynamic-list=$(top_srcdir)/src/gallium/targets/dri-vdpau.dyn \
 	$(GC_SECTIONS)
 
 if HAVE_LD_VERSION_SCRIPT
@@ -34,6 +33,11 @@ gallium_dri_la_LDFLAGS += \
 	-Wl,--version-script=$(top_srcdir)/src/gallium/targets/dri/dri.sym
 endif # HAVE_LD_VERSION_SCRIPT
 
+if HAVE_LD_DYNAMIC_LIST
+gallium_dri_la_LDFLAGS += \
+	-Wl,--dynamic-list=$(top_srcdir)/src/gallium/targets/dri-vdpau.dyn
+endif # HAVE_LD_DYNAMIC_LIST
+
 gallium_dri_la_LIBADD = \
 	$(top_builddir)/src/mesa/libmesagallium.la \
 	$(top_builddir)/src/mesa/drivers/dri/common/libdricommon.la \
diff --git a/src/gallium/targets/vdpau/Makefile.am b/src/gallium/targets/vdpau/Makefile.am
index 6c92cd8..440cf22 100644
--- a/src/gallium/targets/vdpau/Makefile.am
+++ b/src/gallium/targets/vdpau/Makefile.am
@@ -15,7 +15,6 @@ libvdpau_gallium_la_LDFLAGS = \
 	-module \
 	-no-undefined \
 	-version-number $(VDPAU_MAJOR):$(VDPAU_MINOR) \
-	-Wl,--dynamic-list=$(top_srcdir)/src/gallium/targets/dri-vdpau.dyn \
 	$(GC_SECTIONS) \
 	$(LD_NO_UNDEFINED)
 
@@ -24,6 +23,11 @@ libvdpau_gallium_la_LDFLAGS += \
 	-Wl,--version-script=$(top_srcdir)/src/gallium/targets/vdpau/vdpau.sym
 endif # HAVE_LD_VERSION_SCRIPT
 
+if HAVE_LD_DYNAMIC_LIST
+libvdpau_gallium_la_LDFLAGS += \
+	-Wl,--dynamic-list=$(top_srcdir)/src/gallium/targets/dri-vdpau.dyn
+endif # HAVE_LD_DYNAMIC_LIST
+
 libvdpau_gallium_la_LIBADD = \
 	$(top_builddir)/src/gallium/state_trackers/vdpau/libvdpautracker.la \
 	$(top_builddir)/src/gallium/auxiliary/libgallium.la \