[igt-dev] [PATCH 5/7] lib/igt_halffloat.c: Fix musl/uclibc build

[Bernd Kuhls]

From: Stefano Ragni <st3r4g at protonmail.com>

Original patch was added to void-linux:
https://github.com/void-linux/void-packages/commit/ddfc1f66a0c571b420303c33aed29fd38ace4fc7

Bug report with request to split the original patch into some
functional changes:
https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/issues/138

Fixes build error:
../lib/igt_halffloat.c:205:6: error: ‘ifunc’ is not supported on this target
  205 | void igt_float_to_half(const float *f, uint16_t *h, unsigned int num)

../lib/igt_halffloat.c:216:6: error: ‘ifunc’ is not supported on this target
  216 | void igt_half_to_float(const uint16_t *h, float *f, unsigned int num)

Signed-off-by: Bernd Kuhls <bernd at kuhls.net>
---
 lib/igt_halffloat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/igt_halffloat.c b/lib/igt_halffloat.c
index 08ab05fce..5dbe08e01 100644
--- a/lib/igt_halffloat.c
+++ b/lib/igt_halffloat.c
@@ -162,7 +162,7 @@ static inline float _half_to_float(uint16_t val)
 	return fi.f;
 }
 
-#if defined(__x86_64__) && !defined(__clang__)
+#if defined(__x86_64__) && !defined(__clang__) && defined(__GLIBC__) && !defined(__UCLIBC__)
 #pragma GCC push_options
 #pragma GCC target("f16c")
 
-- 
2.39.2