libGL: fix build on ppc64

[ci skip]

srcpkgs/libGL/patches/fix-build-ppc64.patch

@@ -0,0 +1,36 @@
+From 3d5f51f75823620b673b939e6bc5febd66ba83e0 Mon Sep 17 00:00:00 2001
+From: Kevin Daudt <me@ikke.info>
+Date: Wed, 20 Nov 2019 22:03:57 +0000
+Subject: [PATCH] gallium: fix broken if-macro for PIPE_ARCH_LITTLE_ENDIAN
+
+[ae071434e][0] is a commit that was backported from master in 19.2.
+That commit also copied logic from [f9f60da81][1], which causes a
+compilation failure on ppc64le because the macro itself was not changed
+as well.
+
+Change the `#if` to an `#ifdef` to fix this issue.
+
+Fixes #2131
+
+[0]:https://gitlab.freedesktop.org/mesa/mesa/commit/ae071434e918586ab88a6533cd4a3b3f3dbd5a1f
+[1]:https://gitlab.freedesktop.org/mesa/mesa/commit/f9f60da813e69aacf541d25a24622c896f15ba98
+---
+ src/gallium/auxiliary/gallivm/lp_bld_misc.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp b/src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+index 1a47bab7e47..e05c9064990 100644
+--- src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
++++ src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
+@@ -705,7 +705,7 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
+     */
+    builder.setCodeModel(CodeModel::Large);
+ 
+-#if PIPE_ARCH_LITTLE_ENDIAN
++#ifdef PIPE_ARCH_LITTLE_ENDIAN
+    /*
+     * Versions of LLVM prior to 4.0 lacked a table entry for "POWER8NVL",
+     * resulting in (big-endian) "generic" being returned on
+-- 
+2.22.0
+