package/pixman: backport patch to fix inlining issue

pixman fails to build with -Og or -O3 due to forced inlining
statements:

pixman-combine-float.c:370:5: error: inlining failed in call to 'always_inline' 'combine_soft_light_c': function not considered for inlining

The first occurence in the autobuilders is on May 12, 2024, but the
problem already existed before as we haven't updated pixman in a long
time. Therefore, the issue started occurring because we started
testing more random configurations.

Fixes:

  https://autobuild.buildroot.org/results/2f3df7961b3181d9eef79893439ae7ebbe4415ad/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/pixman/0003-pixman-combine-float.c-fix-inlining-failed-error.patch

@@ -0,0 +1,56 @@
+From 643f098a3922592c82f3ea19668a1596d92a3e7b Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Tue, 16 Jul 2024 15:31:16 +0800
+Subject: [PATCH] pixman-combine-float.c: fix inlining failed error
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Refer [1], always-inline is not suggested to be used if you have indirect
+calls. so replace force_inline with inline to fix error like:
+In function ‘combine_inner’,
+    inlined from ‘combine_soft_light_ca_float’ at ../pixman/pixman-combine-float.c:655:511:
+../pixman/pixman-combine-float.c:655:211: error: inlining failed in call to ‘always_inline’ ‘combine_soft_light_c’: function not considered for inlining
+
+Test with gcc-9 and gcc-14, both works well
+
+[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115679
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+Upstream: https://gitlab.freedesktop.org/pixman/pixman/-/commit/643f098a3922592c82f3ea19668a1596d92a3e7b
+---
+ pixman/pixman-combine-float.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/pixman/pixman-combine-float.c b/pixman/pixman-combine-float.c
+index e1f8030..230164f 100644
+--- a/pixman/pixman-combine-float.c
++++ b/pixman/pixman-combine-float.c
+@@ -261,7 +261,7 @@ get_factor (combine_factor_t factor, float sa, float da)
+ }
+ 
+ #define MAKE_PD_COMBINERS(name, a, b)					\
+-    static float force_inline						\
++    static float							\
+     pd_combine_ ## name (float sa, float s, float da, float d)		\
+     {									\
+ 	const float fa = get_factor (a, sa, da);			\
+@@ -360,13 +360,13 @@ MAKE_PD_COMBINERS (conjoint_xor,		ONE_MINUS_DA_OVER_SA,		ONE_MINUS_SA_OVER_DA)
+  */
+ 
+ #define MAKE_SEPARABLE_PDF_COMBINERS(name)				\
+-    static force_inline float						\
++    static float							\
+     combine_ ## name ## _a (float sa, float s, float da, float d)	\
+     {									\
+ 	return da + sa - da * sa;					\
+     }									\
+     									\
+-    static force_inline float						\
++    static float							\
+     combine_ ## name ## _c (float sa, float s, float da, float d)	\
+     {									\
+ 	float f = (1 - sa) * d + (1 - da) * s;				\
+-- 
+2.47.1
+