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cmd/dist: set -Wuninitialized only when -O is also set.

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GCC on OS X 10.6 doesn't support -Wuninitialized without -O.
Fixes #7492.

LGTM=iant
R=golang-codereviews, dave, iant
CC=golang-codereviews
https://golang.org/cl/72360045
This commit is contained in:
Shenghou Ma 2014-03-26 14:20:18 -04:00
parent 7c75a862b4
commit 4271dd4550
1 changed files with 7 additions and 6 deletions
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13
src/cmd/dist/build.c vendored
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@ -457,7 +457,6 @@ static char *proto_gccargs[] = {
"-Wstrict-prototypes",
"-Wextra",
"-Wunused",
"-Wuninitialized",
"-Wno-sign-compare",
"-Wno-missing-braces",
"-Wno-parentheses",
@ -469,17 +468,19 @@ static char *proto_gccargs[] = {
"-fno-common",
"-ggdb",
"-pipe",
#if defined(__NetBSD__) && defined(__arm__)
// GCC 4.5.4 (NetBSD nb1 20120916) on ARM is known to mis-optimize gc/mparith3.c
// Fix available at http://patchwork.ozlabs.org/patch/64562/.
"-O1",
#endif
};
// gccargs2 is the second part of gccargs.
// it is used if the environment isn't defining CFLAGS.
static char *proto_gccargs2[] = {
// on older versions of GCC, -Wuninitialized is not supported
// without -O, so put it here together with -O settings in case
// the user's $CFLAGS doesn't include -O.
"-Wuninitialized",
#if defined(__NetBSD__) && defined(__arm__)
// GCC 4.5.4 (NetBSD nb1 20120916) on ARM is known to mis-optimize gc/mparith3.c
// Fix available at http://patchwork.ozlabs.org/patch/64562/.
"-O1",
#else
"-O2",
#endif