Date: Sun, 4 Jan 2015 20:08:25 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r276666 - head/sys/conf Message-ID: <201501042008.t04K8P6A022616@svn.freebsd.org>
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Author: ian Date: Sun Jan 4 20:08:24 2015 New Revision: 276666 URL: https://svnweb.freebsd.org/changeset/base/276666 Log: Eliminate uninitialized variable warnings in kernel and module builds when building with gcc 4.2 This has been requested several times over the past few months by several people (including me), because gcc 4.2 just gets it wrong too often. It's causing us to litter the code with lots of bogus initializers just to squelch the warnings. We still have clang and coverity telling us about uninitialized variables, and they do so more accurately. Modified: head/sys/conf/kern.mk Modified: head/sys/conf/kern.mk ============================================================================== --- head/sys/conf/kern.mk Sun Jan 4 19:55:44 2015 (r276665) +++ head/sys/conf/kern.mk Sun Jan 4 20:08:24 2015 (r276666) @@ -31,7 +31,8 @@ CWARNEXTRA?= -Wno-error-tautological-com -Wno-error-pointer-sign -Wno-error-format -Wno-error-parentheses .endif -.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40300 +.if ${COMPILER_TYPE} == "gcc" +.if ${COMPILER_VERSION} >= 40300 # Catch-all for all the things that are in our tree, but for which we're # not yet ready for this compiler. Note: we likely only really "support" # building with gcc 4.8 and newer. Nothing older has been tested. @@ -40,6 +41,10 @@ CWARNEXTRA?= -Wno-error=inline -Wno-erro -Wno-error=array-bounds -Wno-error=address \ -Wno-error=cast-qual -Wno-error=sequence-point -Wno-error=attributes \ -Wno-error=strict-overflow -Wno-error=overflow +.else +# For gcc 4.2, eliminate the too-often-wrong warnings about uninitialized vars. +CWARNEXTRA?= -Wno-uninitialized +.endif .endif # External compilers may not support our format extensions. Allow them
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