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>
[Bernd: PKG_CHECK_MODULES should not fail when libatomic_ops is missing]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
---
 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", true)
 	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