http://llvm.org/bugs/show_bug.cgi?id=20896
Bug ID: 20896
Summary: Don't define __x86_64__ in microsoft mode?
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
v8 uses this technique to check for x32:
#if defined(__x86_64__) && !defined(__LP64__)
...
#endif
With cl.exe, this works as cl.exe doesn't define __x86_64__. With clang-cl,
this fails since clang-cl does define __x86_64__ but doesn't define __LP64__
(because Windows is LLP64).
clang-cl probably shouldn't define __x86_64__? It already defines the
cl-equivalent _M_X64.
https://codereview.chromium.org/18014003/diff/161001/src/base/build_config.h
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