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treat invalid C as an error even if warnings aren't enabled.
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configure
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12
configure
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@ -270,9 +270,19 @@ fnmatch '-march=*|*\ -march=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -march=i486
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fnmatch '-mtune=*|*\ -mtune=*' "$CFLAGS" || tryldflag CFLAGS_AUTO -mtune=generic
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fi
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#
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# Even with -std=c99, gcc accepts some constructs which are constraint
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# violations. We want to treat these as errors regardless of whether
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# other purely stylistic warnings are enabled -- especially implicit
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# function declarations, which are a dangerous programming error.
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#
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tryflag CFLAGS_AUTO -Werror=implicit-function-declaration
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tryflag CFLAGS_AUTO -Werror=implicit-int
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tryflag CFLAGS_AUTO -Werror=pointer-sign
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tryflag CFLAGS_AUTO -Werror=pointer-arith
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if test "x$warnings" = xyes ; then
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tryflag CFLAGS_AUTO -Wall
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tryflag CFLAGS_AUTO -Wpointer-arith
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tryflag CFLAGS_AUTO -Wcast-align
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tryflag CFLAGS_AUTO -Wno-parentheses
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tryflag CFLAGS_AUTO -Wno-uninitialized
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