commit d532334ef514e9625559e76c83119d317ca790f3
author Vadim Zeitlin <vadim@zeitlins.org> Mon Nov 13 22:05:07 2017 +0100
committer Vadim Zeitlin <vadim@zeitlins.org> Mon Nov 13 22:06:01 2017 +0100
tree effb50f832fb330cf81f2ca8d6ec2e9caf783ebf
parent fc32eb1662d29a4467bd4fd7d3484d607507420f

Avoid -Wundef warnings when building libpng

Always define PNG_INTEL_SSE_OPT and PNG_INTEL_SSE_IMPLEMENTATION before
comparing them with 0.

pngpriv.h

diff --git a/pngpriv.h b/pngpriv.h
index 07349f4..a7851cd 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -210,7 +210,11 @@
        defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \
        (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
 #         define PNG_INTEL_SSE_OPT 1
+#      else
+#         define PNG_INTEL_SSE_OPT 0
 #      endif
+#   else
+#      define PNG_INTEL_SSE_OPT 0
 #   endif
 #endif
 
@@ -234,6 +238,8 @@
 #   if PNG_INTEL_SSE_IMPLEMENTATION > 0
 #      define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_sse2
 #   endif
+#else
+#   define PNG_INTEL_SSE_IMPLEMENTATION 0
 #endif
 
 #if PNG_MIPS_MSA_OPT > 0