[Mesa-dev] [PATCH 1/1] Fix runtime error with uClibc

[Bernd Kuhls]

Patch inspired by
https://www.winehq.org/pipermail/wine-bugs/2011-September/288987.html
http://git.alpinelinux.org/cgit/aports/tree/main/wine/uclibc-fmaxf-fminf.patch?id=c9b491b6099eec02a835ffd05539b5c783c6c43a

Starting an app using mesa3d 10.5.x, Kodi for example, fails:

/usr/lib/kodi/kodi.bin: symbol 'fminf': can't resolve symbol in lib '/usr/lib/dri/i965_dri.so'.
libGL error: unable to load driver: i965_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: i965
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast

Here is some background information about the fminf/fmaxf situation in uClibc:
http://thread.gmane.org/gmane.comp.lib.uclibc.general/24189

Please backport this patch to the 10.5 branch.

Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>
---
 src/glsl/nir/nir_constant_expressions.py |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/glsl/nir/nir_constant_expressions.py b/src/glsl/nir/nir_constant_expressions.py
index 22bc4f0..139c25a 100644
--- a/src/glsl/nir/nir_constant_expressions.py
+++ b/src/glsl/nir/nir_constant_expressions.py
@@ -50,6 +50,18 @@ static double copysign(double x, double y)
 }
 #endif
 
+#ifdef __UCLIBC__
+float fmaxf(float a, float b)
+{
+	return (a > b) ? a : b;
+}
+
+float fminf(float a, float b)
+{
+	return (a < b) ? a : b;
+}
+#endif
+
 /**
  * Evaluate one component of packSnorm4x8.
  */
-- 
1.7.10.4