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win: Pass /W4 in front of all the -wd flags.

This should fix many many -Wunused-parameter warnings in self-host builds on
Windows after r255382.  cl.exe doesn't care about the order of /W4 and
/wd flags, but clang-cl currently does (just like -Wno-foo -Wall order
matters for clang).  We might want to change how clang-cl behaves in
the future, but until then this change makes self-host builds much more
silent.

llvm-svn: 256315
This commit is contained in:
Nico Weber 2015-12-23 02:38:31 +00:00
parent 50f282e6ca
commit 4d29f9cae5

View File

@ -338,7 +338,10 @@ if( MSVC )
# Enable warnings
if (LLVM_ENABLE_WARNINGS)
append("/W4" msvc_warning_flags)
# Put /W4 in front of all the -we flags. cl.exe doesn't care, but for
# clang-cl having /W4 after the -we flags will re-enable the warnings
# disabled by -we.
set(msvc_warning_flags "/W4 ${msvc_warning_flags}")
# CMake appends /W3 by default, and having /W3 followed by /W4 will result in
# cl : Command line warning D9025 : overriding '/W3' with '/W4'. Since this is
# a command line warning and not a compiler warning, it cannot be suppressed except