File: png_fix_rpi.patch

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diff -r -u /tmp/libpng-1.6.37/scripts/pnglibconf.h.prebuilt ./scripts/pnglibconf.h.prebuilt
--- /tmp/libpng-1.6.37/scripts/pnglibconf.h.prebuilt    2019-04-14 11:10:32.000000000 -0700
+++ ./scripts/pnglibconf.h.prebuilt     2019-05-21 09:40:52.138528512 -0700
@@ -19,6 +19,12 @@
 #define PNG_ALIGNED_MEMORY_SUPPORTED
 /*#undef PNG_ARM_NEON_API_SUPPORTED*/
 /*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
+
+/* Workaround not having a great build file by forcing
+ * png filter optimization to be disabled on arm */
+#define PNG_ARM_NEON_OPT 0
+
+
 #define PNG_BENIGN_ERRORS_SUPPORTED
 #define PNG_BENIGN_READ_ERRORS_SUPPORTED
 /*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/