libdrm: fix libatomic_ops linking

Add patch 0003-configure-Makefile.am-use-pkg-config-to-discover-lib.patch
provided by Thomas Petazzoni handling libatomic_ops linking when needed.

Fixes [1]:

    CCLD     etnaviv_cmd_stream_test
  ../../etnaviv/.libs/libdrm_etnaviv.so: undefined reference to `AO_store_full_emulation'
  ../../etnaviv/.libs/libdrm_etnaviv.so: undefined reference to `AO_fetch_compare_and_swap_emulation'
  collect2: error: ld returned 1 exit status

[1] http://autobuild.buildroot.net/results/92e074c49417261843eef95872ff935a56077c98

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libdrm/0003-configure-Makefile.am-use-pkg-config-to-discover-lib.patch

@@ -0,0 +1,160 @@
+From 57d544ff2f96a26cac07d5be00ff7b67678ae7b8 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Mon, 18 Dec 2017 13:08:39 +0100
+Subject: [PATCH] configure/Makefile.am: use pkg-config to discover
+ libatomic_ops
+
+The configure script currently tests the availability of libatomic_ops
+by checking the presence of atomic_ops.h. While this is good enough as
+an availability test, it is not sufficient as on some platforms,
+libatomic_ops provides an actual shared library against which we
+should be linked to access libatomic_ops functionality.
+
+Therefore, we instead use PKG_CHECK_MODULES() to test the availability
+of libatomic_ops. Besides testing its availability, this also fills in
+the ATOMIC_OPS_LIBS variable with the list of libraries we need to
+link with to use libatomic_ops.
+
+All Mesa drivers that include xf86atomic.h have been updated to link
+against ATOMIC_OPS_LIBS.
+
+Of course, if we're not using libatomic_ops, ATOMIC_OPS_LIBS is empty,
+and we don't link against it.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Signed-off-by: Peter Seiderer <ps.report@gmx.net>
+---
+ amdgpu/Makefile.am    | 2 +-
+ configure.ac          | 2 +-
+ etnaviv/Makefile.am   | 3 ++-
+ freedreno/Makefile.am | 3 ++-
+ intel/Makefile.am     | 3 ++-
+ nouveau/Makefile.am   | 2 +-
+ omap/Makefile.am      | 2 +-
+ radeon/Makefile.am    | 2 +-
+ tegra/Makefile.am     | 2 +-
+ 9 files changed, 12 insertions(+), 9 deletions(-)
+
+diff --git a/amdgpu/Makefile.am b/amdgpu/Makefile.am
+index a1b0d05c..b2bcceff 100644
+--- a/amdgpu/Makefile.am
++++ b/amdgpu/Makefile.am
+@@ -36,7 +36,7 @@ AM_CPPFLAGS = -DAMDGPU_ASIC_ID_TABLE=\"${libdrmdatadir}/amdgpu.ids\"
+ libdrm_amdgpu_la_LTLIBRARIES = libdrm_amdgpu.la
+ libdrm_amdgpu_ladir = $(libdir)
+ libdrm_amdgpu_la_LDFLAGS = -version-number 1:0:0 -no-undefined
+-libdrm_amdgpu_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
++libdrm_amdgpu_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@ @ATOMIC_OPS_LIBS@
+ 
+ libdrm_amdgpu_la_SOURCES = $(LIBDRM_AMDGPU_FILES)
+ amdgpu_asic_id.lo: $(top_srcdir)/data/amdgpu.ids
+diff --git a/configure.ac b/configure.ac
+index 35378b33..501d0871 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -247,7 +247,7 @@ AC_CACHE_CHECK([for native atomic primitives], drm_cv_atomic_primitives, [
+ 					  ]],[[]])], [drm_cv_atomic_primitives="Intel"],[])
+ 
+ 	if test "x$drm_cv_atomic_primitives" = "xnone"; then
+-		AC_CHECK_HEADER([atomic_ops.h], drm_cv_atomic_primitives="libatomic-ops")
++		PKG_CHECK_MODULES(ATOMIC_OPS, [atomic_ops], drm_cv_atomic_primitives="libatomic-ops")
+ 	fi
+ 
+ 	# atomic functions defined in <atomic.h> & libc on Solaris
+diff --git a/etnaviv/Makefile.am b/etnaviv/Makefile.am
+index be96ba86..669cf14f 100644
+--- a/etnaviv/Makefile.am
++++ b/etnaviv/Makefile.am
+@@ -12,7 +12,8 @@ libdrm_etnaviv_la_LDFLAGS = -version-number 1:0:0 -no-undefined
+ libdrm_etnaviv_la_LIBADD = \
+ 	../libdrm.la \
+ 	@PTHREADSTUBS_LIBS@ \
+-	@CLOCK_LIB@
++	@CLOCK_LIB@ \
++	@ATOMIC_OPS_LIBS@
+ 
+ libdrm_etnaviv_la_SOURCES = $(LIBDRM_ETNAVIV_FILES)
+ 
+diff --git a/freedreno/Makefile.am b/freedreno/Makefile.am
+index cbb0d031..238407e3 100644
+--- a/freedreno/Makefile.am
++++ b/freedreno/Makefile.am
+@@ -14,7 +14,8 @@ libdrm_freedreno_la_LDFLAGS = -version-number 1:0:0 -no-undefined
+ libdrm_freedreno_la_LIBADD = \
+ 	../libdrm.la \
+ 	@PTHREADSTUBS_LIBS@ \
+-	@CLOCK_LIB@
++	@CLOCK_LIB@ \
++	@ATOMIC_OPS_LIBS@
+ 
+ libdrm_freedreno_la_SOURCES = $(LIBDRM_FREEDRENO_FILES)
+ if HAVE_FREEDRENO_KGSL
+diff --git a/intel/Makefile.am b/intel/Makefile.am
+index c52e8c08..f3635a64 100644
+--- a/intel/Makefile.am
++++ b/intel/Makefile.am
+@@ -38,7 +38,8 @@ libdrm_intel_la_LDFLAGS = -version-number 1:0:0 -no-undefined
+ libdrm_intel_la_LIBADD = ../libdrm.la \
+ 	@PTHREADSTUBS_LIBS@ \
+ 	@PCIACCESS_LIBS@ \
+-	@CLOCK_LIB@
++	@CLOCK_LIB@ \
++	@ATOMIC_OPS_LIBS@
+ 
+ libdrm_intel_la_SOURCES = $(LIBDRM_INTEL_FILES)
+ 
+diff --git a/nouveau/Makefile.am b/nouveau/Makefile.am
+index 344a8445..a4e6a78b 100644
+--- a/nouveau/Makefile.am
++++ b/nouveau/Makefile.am
+@@ -10,7 +10,7 @@ AM_CFLAGS = \
+ libdrm_nouveau_la_LTLIBRARIES = libdrm_nouveau.la
+ libdrm_nouveau_ladir = $(libdir)
+ libdrm_nouveau_la_LDFLAGS = -version-number 2:0:0 -no-undefined
+-libdrm_nouveau_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
++libdrm_nouveau_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@ @ATOMIC_OPS_LIBS@
+ 
+ libdrm_nouveau_la_SOURCES = $(LIBDRM_NOUVEAU_FILES)
+ 
+diff --git a/omap/Makefile.am b/omap/Makefile.am
+index 599bb9de..524afee3 100644
+--- a/omap/Makefile.am
++++ b/omap/Makefile.am
+@@ -7,7 +7,7 @@ AM_CFLAGS = \
+ libdrm_omap_la_LTLIBRARIES = libdrm_omap.la
+ libdrm_omap_ladir = $(libdir)
+ libdrm_omap_la_LDFLAGS = -version-number 1:0:0 -no-undefined
+-libdrm_omap_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
++libdrm_omap_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@ @ATOMIC_OPS_LIBS@
+ 
+ libdrm_omap_la_SOURCES = omap_drm.c
+ 
+diff --git a/radeon/Makefile.am b/radeon/Makefile.am
+index e2415314..c27d3c75 100644
+--- a/radeon/Makefile.am
++++ b/radeon/Makefile.am
+@@ -33,7 +33,7 @@ AM_CFLAGS = \
+ libdrm_radeon_la_LTLIBRARIES = libdrm_radeon.la
+ libdrm_radeon_ladir = $(libdir)
+ libdrm_radeon_la_LDFLAGS = -version-number 1:0:1 -no-undefined
+-libdrm_radeon_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
++libdrm_radeon_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@ @ATOMIC_OPS_LIBS@
+ 
+ libdrm_radeon_la_SOURCES = $(LIBDRM_RADEON_FILES)
+ 
+diff --git a/tegra/Makefile.am b/tegra/Makefile.am
+index fb40be55..12abe8c4 100644
+--- a/tegra/Makefile.am
++++ b/tegra/Makefile.am
+@@ -9,7 +9,7 @@ AM_CFLAGS = \
+ libdrm_tegra_ladir = $(libdir)
+ libdrm_tegra_la_LTLIBRARIES = libdrm_tegra.la
+ libdrm_tegra_la_LDFLAGS = -version-number 0:0:0 -no-undefined
+-libdrm_tegra_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
++libdrm_tegra_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@ @ATOMIC_OPS_LIBS@
+ 
+ libdrm_tegra_la_SOURCES = \
+ 	private.h \
+-- 
+2.14.3
+

package/libdrm/libdrm.mk

@@ -9,9 +9,15 @@ LIBDRM_SOURCE = libdrm-$(LIBDRM_VERSION).tar.bz2
 LIBDRM_SITE = https://dri.freedesktop.org/libdrm
 LIBDRM_LICENSE = MIT
 LIBDRM_INSTALL_STAGING = YES
+
+# patch 0003-configure-Makefile.am-use-pkg-config-to-discover-lib.patch
+# touching configure.ac/Makefile.am (and host-xutil_util-macros dependency)
+LIBDRM_AUTORECONF = YES
+
 LIBDRM_DEPENDENCIES = \
 	libpthread-stubs \
-	host-pkgconf
+	host-pkgconf \
+	host-xutil_util-macros
 
 LIBDRM_CONF_OPTS = \
 	--disable-cairo-tests \