Fix most MSVC warnings in compiler-rt profiling library

Here's the warnings and how they were fixed:

- InstrProfilingUtil.c(110): warning C4013: '_open_osfhandle' undefined; assuming extern returning int

Include io.h to get the prototype.

- warning C4005: 'FILE_MAP_EXECUTE': macro redefinition

Stop trying to support pre-XP versions of Windows, don't attempt to
define this macro.

- InstrProfilingWriter.c(271): warning C4221: nonstandard extension used: 'Data': cannot be initialized using address of automatic variable 'Header'
- InstrProfilingWriter.c(275): warning C4221: nonstandard extension used: 'Data': cannot be initialized using address of automatic variable 'Zeroes'

Turn this warning off. This is definitely legal in C++, all compilers
accept it, and I only have room for half of one language standard in my
brain.

- InstrProfilingValue.c(320): warning C4113: 'uint32_t (__cdecl *)()' differs in parameter lists from 'uint32_t (__cdecl *)(void)'

Fix this with an explicit (void) in the prototype.

- InstrProfilingMerge.c.obj : warning LNK4006: _VPMergeHook already defined in InstrProfilingMergeFile.c.obj; second definition ignored

Last remaining warning. This is from linking a selectany definition with
a strong definition. We need to sort out weak symbols in compiler-rt in
general, though.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@273026 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/profile/InstrProfilingUtil.c b/lib/profile/InstrProfilingUtil.c
index e87ab7640..be1012117 100644
--- a/lib/profile/InstrProfilingUtil.c
+++ b/lib/profile/InstrProfilingUtil.c
@@ -12,6 +12,7 @@
 
 #ifdef _WIN32
 #include <direct.h>
+#include <io.h>
 #include <windows.h>
 #else
 #include <sys/stat.h>