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-rw-r--r--gfx/cairo/win32-ffs-gcc.patch25
1 files changed, 25 insertions, 0 deletions
diff --git a/gfx/cairo/win32-ffs-gcc.patch b/gfx/cairo/win32-ffs-gcc.patch
new file mode 100644
index 000000000..e7cc1d1f6
--- /dev/null
+++ b/gfx/cairo/win32-ffs-gcc.patch
@@ -0,0 +1,25 @@
+diff --git a/gfx/cairo/cairo/src/cairo-compiler-private.h b/gfx/cairo/cairo/src/cairo-compiler-private.h
+index ffac9ce..9a05831 100644
+--- a/gfx/cairo/cairo/src/cairo-compiler-private.h
++++ b/gfx/cairo/cairo/src/cairo-compiler-private.h
+@@ -229,16 +229,20 @@ ffs (int x)
+
+ if (_BitScanForward(&i, x) != 0)
+ return i + 1;
+
+ return 0;
+ }
+ #endif
+
++#elif defined(__WIN32__) && defined(__GNUC__)
++
++#define ffs(x) __builtin_ffs(x)
++
+ #endif
+
+ #if defined(_MSC_VER) && defined(_M_IX86)
+ /* When compiling with /Gy and /OPT:ICF identical functions will be folded in together.
+ The CAIRO_ENSURE_UNIQUE macro ensures that a function is always unique and
+ will never be folded into another one. Something like this might eventually
+ be needed for GCC but it seems fine for now. */
+ #define CAIRO_ENSURE_UNIQUE \