[Mesa-dev] [Bug 83669] fix build with gcc link time optimizer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83669

--- Comment #13 from Marc Dietrich <marvin24 at gmx.de> ---
gcc/clang development is fast and also the mesa supported version numbers of
compilers are increasing. So this is a fast moving target. That said, I
currently use the _target_ attribute of gcc (not supported by clang yet AFAIK),
and add a #pragma target:

diff --git a/src/mesa/Makefile.am b/src/mesa/Makefile.am
index 3903818..b83dc76 100644
--- a/src/mesa/Makefile.am
+++ b/src/mesa/Makefile.am
@@ -181,7 +181,9 @@ libmesagallium_la_LIBADD = \
 libmesa_sse41_la_SOURCES = \
        $(X86_SSE41_FILES)

+if !HAVE_TARGET_ATTRIBUTE
 libmesa_sse41_la_CFLAGS = $(AM_CFLAGS) $(SSE41_CFLAGS)
+endif

 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = gl.pc
diff --git a/src/mesa/main/sse_minmax.c b/src/mesa/main/sse_minmax.c
index 2e34716..5fd59fc 100644
--- a/src/mesa/main/sse_minmax.c
+++ b/src/mesa/main/sse_minmax.c
@@ -25,6 +25,7 @@
  *
  */

+#pragma GCC target ("sse4.1")
 #include "main/sse_minmax.h"
 #include <smmintrin.h>
 #include <stdint.h>
diff --git a/src/mesa/main/streaming-load-memcpy.c
b/src/mesa/main/streaming-load-memcpy.c
index 32854b6..8066954 100644
--- a/src/mesa/main/streaming-load-memcpy.c
+++ b/src/mesa/main/streaming-load-memcpy.c
@@ -26,6 +26,7 @@
  *
  */

+#pragma GCC target ("sse4.1")
 #include "main/macros.h"
 #include "main/streaming-load-memcpy.h"
 #include <smmintrin.h>


That works fine for gcc and clang so far for me. Not sure if this is a working
solution for everyone.

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