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diff -up webkitgtk-2.0.4/GNUmakefile.in.libatomic webkitgtk-2.0.4/GNUmakefile.in
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--- webkitgtk-2.0.4/GNUmakefile.in.libatomic 2013-07-19 14:12:04.000000000 +0200
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+++ webkitgtk-2.0.4/GNUmakefile.in 2013-10-01 13:29:45.078869244 +0200
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@@ -20865,6 +20865,7 @@ libWTF_la_CXXFLAGS = \
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$(libWTF_la_CFLAGS)
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libWTF_la_CFLAGS = \
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+ -latomic \
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-fstrict-aliasing \
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-O3 \
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$(global_cflags) \
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@@ -22244,6 +22245,7 @@ Programs_WebKitPluginProcess_SOURCES = \
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Programs_WebKitPluginProcess_LDADD = \
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-lpthread \
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+ -latomic \
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libjavascriptcoregtk-@WEBKITGTK_API_MAJOR_VERSION@.@WEBKITGTK_API_MINOR_VERSION@.la \
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WebCoreLayerGtk2.a \
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$(CAIRO_LIBS) \
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diff -up webkitgtk-2.0.4/Source/WebKit2/GNUmakefile.am.libatomic webkitgtk-2.0.4/Source/WebKit2/GNUmakefile.am
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diff -up webkitgtk-2.0.4/Source/WTF/GNUmakefile.am.libatomic webkitgtk-2.0.4/Source/WTF/GNUmakefile.am
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--- webkitgtk-2.0.4/Source/WTF/GNUmakefile.am.libatomic 2012-07-19 12:02:14.000000000 +0200
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+++ webkitgtk-2.0.4/Source/WTF/GNUmakefile.am 2013-10-01 13:26:50.971876621 +0200
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@@ -25,6 +25,7 @@ libWTF_la_CXXFLAGS = \
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$(libWTF_la_CFLAGS)
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libWTF_la_CFLAGS = \
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+ -latomic \
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-fstrict-aliasing \
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-O3 \
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$(global_cflags) \
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diff -up webkitgtk-2.0.4/Source/WTF/wtf/Atomics.h.libatomic webkitgtk-2.0.4/Source/WTF/wtf/Atomics.h
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--- webkitgtk-2.0.4/Source/WTF/wtf/Atomics.h.libatomic 2013-07-19 09:03:53.000000000 +0200
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+++ webkitgtk-2.0.4/Source/WTF/wtf/Atomics.h 2013-10-01 13:26:50.971876621 +0200
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@@ -107,6 +107,17 @@ inline int atomicDecrement(int volatile*
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inline int atomicIncrement(int volatile* addend) { return __atomic_inc(addend) + 1; }
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inline int atomicDecrement(int volatile* addend) { return __atomic_dec(addend) - 1; }
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+#elif COMPILER(GCC) && (__GNUC__ > 4 || (__GNUC__ == 4 \
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+ && (__GNUC_MINOR__ > 8 || (__GNUC_MINOR__ == 8 \
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+ && (__GNUC_PATCHLEVEL__ > 0 || (__GNUC_PATCHLEVEL__ == 0)))))) \
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+ && CPU(PPC)
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+#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1
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+inline int atomicIncrement(int volatile* addend) { return __atomic_fetch_add(addend, 1, __ATOMIC_ACQ_REL); }
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+inline int atomicDecrement(int volatile* addend) { return __atomic_fetch_sub(addend, 1, __ATOMIC_ACQ_REL); }
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+
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+inline int64_t atomicIncrement(int64_t volatile* addend) { return __atomic_fetch_add(addend, 1, __ATOMIC_ACQ_REL); }
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+inline int64_t atomicDecrement(int64_t volatile* addend) { return __atomic_fetch_sub(addend, 1, __ATOMIC_ACQ_REL); }
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+
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#elif COMPILER(GCC) && !CPU(SPARC64) // sizeof(_Atomic_word) != sizeof(int) on sparc64 gcc
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#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1
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