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configure: clang: set custom warning flags for clang

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Before there was no attempt to set warning flags sanely when compiling
with clang. Set some reasonable defaults that cut down noise and
enable various non-default warnings that are enabled with GCC too.
I'm not sure whether clang is supposed to support more of the options
now used with GCC - it accepts some of those options but they
apparently have no effect; I didn't find any real documentation about
the individual warnings.
This commit is contained in:
Uoti Urpala 2011-07-07 22:51:23 +03:00
parent 5a997b8195
commit c56dfab597
1 changed files with 2 additions and 0 deletions
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2
configure vendored
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@ -2319,6 +2319,8 @@ elif test -z "$CFLAGS" ; then
CFLAGS="-O2 $_march $_mcpu $_pipe -xc99 -xregs=frameptr"
elif test "$cc_vendor" = "clang"; then
CFLAGS="-O2 $_march $_pipe"
WARNFLAGS="-Wall -Wno-switch-enum -Wno-logical-op-parentheses -Wpointer-arith -Wundef -Wno-pointer-sign -Wmissing-prototypes"
ERRORFLAGS="-Werror=implicit-function-declaration"
elif test "$cc_vendor" != "gnu" ; then
CFLAGS="-O2 $_march $_mcpu $_pipe"
else