http://llvm.org/bugs/show_bug.cgi?id=16766
Bug ID: 16766
Summary: clang with -fms-extensions should treat __inline in C
as it treats inline in C++
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The MSDN docs spell this out:
http://msdn.microsoft.com/en-us/library/z8y1yy88.aspx
"The inline keyword is available only in C++. The __inline and __forceinline
keywords are available in both C and C++."
...
"The __inline keyword is equivalent to inline."
In particular, this code similar to some in winnt.h will cause multiple
definition link errors:
int foo(int);
__inline int foo(int x) { return x; }
Clang will emit a strong definition for foo instead of a weak or linkonce
definition.
This prevents clang from compiling and linking multiple C files that include
windows.h.
I don't think this will break people following C99 inline rules, but it will
cause them to start emitting more linkonce code.
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