forked from OSchip/llvm-project
5e866e411c
I noticed that compiling on Windows with -fno-ms-compatibility had the side effect of defining __GNUC__, along with __GNUG__, __GXX_RTTI__, and a number of other macros for GCC compatibility. This is undesirable and causes Chromium to do things like mix __attribute__ and __declspec, which doesn't work. We should have a positive language option to enable GCC compatibility features so that we can experiment with -fno-ms-compatibility on Windows. This change adds -fgnuc-version= to be that option. My issue aside, users have, for a long time, reported that __GNUC__ doesn't match their expectations in one way or another. We have encouraged users to migrate code away from this macro, but new code continues to be written assuming a GCC-only environment. There's really nothing we can do to stop that. By adding this flag, we can allow them to choose their own adventure with __GNUC__. This overlaps a bit with the "GNUMode" language option from -std=gnu*. The gnu language mode tends to enable non-conforming behaviors that we'd rather not enable by default, but the we want to set things like __GXX_RTTI__ by default, so I've kept these separate. Helps address PR42817 Reviewed By: hans, nickdesaulniers, MaskRay Differential Revision: https://reviews.llvm.org/D68055 llvm-svn: 374449 |
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| .. | ||
| Inputs | ||
| altivec-header.c | ||
| altivec-intrin.c | ||
| arm-acle-header.c | ||
| arm-fp16-header.c | ||
| arm-neon-header.c | ||
| arm64-apple-ios-types.cpp | ||
| c11.c | ||
| c89.c | ||
| cpuid.c | ||
| cxx11.cpp | ||
| float-darwin.c | ||
| float.c | ||
| float16.c | ||
| htm-header.c | ||
| int64-type.c | ||
| limits.cpp | ||
| max_align.c | ||
| mm3dnow.c | ||
| ms-arm64-intrin.cpp | ||
| ms-cppoperkey.cpp | ||
| ms-cppoperkey1.cpp | ||
| ms-cppoperkey2.cpp | ||
| ms-intrin.cpp | ||
| ms-null-ms-header-vs-stddef.cpp | ||
| ms-wchar.c | ||
| nvptx_device_cmath_functions.c | ||
| nvptx_device_cmath_functions.cpp | ||
| nvptx_device_cmath_functions_cxx17.cpp | ||
| nvptx_device_math_functions.c | ||
| nvptx_device_math_functions.cpp | ||
| nvptx_device_math_functions_cxx17.cpp | ||
| opencl-c-header.cl | ||
| pconfigintin.c | ||
| pmmintrin.c | ||
| ppc-intrinsics.c | ||
| sgxintrin.c | ||
| stdarg-gnuc_va_list.c | ||
| stdarg.cpp | ||
| stdatomic.c | ||
| stdbool.cpp | ||
| stddefneeds.cpp | ||
| stdint-typeof-MINMAX.cpp | ||
| tgmath-darwin.c | ||
| tgmath.c | ||
| thumbv7-apple-ios-types.cpp | ||
| typedef_guards.c | ||
| unwind.c | ||
| wchar_limits.cpp | ||
| wmmintrin.c | ||
| x86-intrinsics-headers-clean.cpp | ||
| x86-intrinsics-headers.c | ||
| x86_64-apple-macosx-types.cpp | ||
| x86intrin-2.c | ||
| x86intrin.c | ||
| x86intrin.cpp | ||
| xmmintrin.c | ||