bug in GCC 5 workaround, see nothings/stb#280

include/imq/thirdparty/stb_image.h

@@ -712,13 +712,17 @@ static int stbi__sse2_available()
 
 static int stbi__sse2_available()
 {
-#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 // GCC 4.8 or later
-   // GCC 4.8+ has a nice way to do this
-   return __builtin_cpu_supports("sse2");
+	// This is a fix for https://github.com/nothings/stb/issues/280
+#if defined(STBI__X64_TARGET)
+	// on x64, SSE2 can be assumed to be available.
+	return 1;
 #else
-   // portable way to do this, preferably without using GCC inline ASM?
-   // just bail for now.
-   return 0;
+	// __builtin_cpu_supports is buggy on GCC 5 and above, causing problems if
+	// referenced in a shared object, giving missing __cpu_model hidden symbol errors.
+	// To get around that, just assume that SSE2 is not available on x86.
+	//
+	// See https://github.com/nothings/stb/issues/280 for more information.
+	return 0;
 #endif
 }
 #endif

premake5.lua

@@ -26,8 +26,6 @@ project "imq"
     includedirs {"include/imq", "grammar", environment.ANTLR_CPP_PATH}
     links {environment.ANTLR_LIB}
     defines {"_SCL_SECURE_NO_WARNINGS", "IMQ_SHARED_LIB", "IMQ_SHARED_LIB_BUILD"}
-
-    pic "On"
 
     prebuildcommands {
         "{ECHO} Cleaning grammar",