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3 Commits

Author SHA1 Message Date
Richard Smith
91f9b50b1c configure: when performing a compiler feature test for a -Wno-foo flag, attempt 
to use -Wfoo instead of -Wno-foo. This works around a bug in some versions of
gcc, where it will silently accept an unknown -Wno-foo option, but will
generate an error for a compile which uses -Wno-foo if that compile also
triggers any warnings.

llvm-svn: 174770
 2013-02-08 22:55:10 +00:00
Rafael Espindola
51ef203cf0 Enable -Wcovered-switch-default again, but add -Werror to the checks to make 
sure we don't use it with compilers that don't support it.

llvm-svn: 151665
 2012-02-28 23:32:06 +00:00
Julien Lerouge
b36e2ea7e1 Add an autoconf test to check for optional compiler flags like 
-Wno-missing-field-initializers or -Wno-variadic-macros.

llvm-svn: 85147
 2009-10-26 19:58:44 +00:00