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qt4: add patch for gcc8 issue with alignof()

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Jürgen Buchmüller 2018-05-28 19:46:07 +02:00
parent 95161bf2d8
commit e9fbf4e0c8
1 changed files with 18 additions and 0 deletions
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18
srcpkgs/qt5/patches/gcc8-chromium-mojo.patch Normal file
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@ -0,0 +1,18 @@
--- qtwebengine/src/3rdparty/chromium/mojo/public/c/system/macros.h 2018-05-15 14:58:46.448912634 -0400
+++ qtwebengine/src/3rdparty/chromium/mojo/public/c/system/macros.h 2018-05-15 14:58:52.041784613 -0400
@@ -18,7 +18,13 @@
#endif
// Like the C++11 |alignof| operator.
-#if __cplusplus >= 201103L
+#if defined(__GNUC__) && __GNUC__ >= 8
+// GCC 8 has changed the alignof operator to return the minimal alignment
+// required by the target ABI, instead of the preferred alignment.
+// This means that on 32-bit x86, it will return 4 instead of 8.
+// Use __alignof__ instead to avoid this.
+#define MOJO_ALIGNOF(type) __alignof__(type)
+#elif __cplusplus >= 201103L
#define MOJO_ALIGNOF(type) alignof(type)
#elif defined(__GNUC__)
#define MOJO_ALIGNOF(type) __alignof__(type)
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