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dist: add clang specific -Wno options

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Clang 3.1 has more warnings enabled by default than GCC.
Combined with -Werror, they cause the build to fail
unnecessarily.  if the name of our compiler ends in "clang",
add the necessary extra -Wno options.  Ideally we would add
these flags unconditionally, as GCC is supposed to ignore
unknown -Wno flags, but apple's llvm-gcc doesn't.

Fixes #2878.

R=rsc, dave
CC=golang-dev
https://golang.org/cl/5673055
This commit is contained in:
Bobby Powers 2012-02-16 13:31:46 -05:00 committed by Russ Cox
parent 5c598d3c9f
commit 7c2bfa4f2c
1 changed files with 5 additions and 1 deletions
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6
src/cmd/dist/build.c vendored
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@ -582,8 +582,12 @@ install(char *dir)
splitfields(&gccargs, bstr(&b));
for(i=0; i<nelem(proto_gccargs); i++)
vadd(&gccargs, proto_gccargs[i]);
if(xstrstr(gccargs.p[0], "clang") != nil) {
vadd(&gccargs, "-Wno-dangling-else");
vadd(&gccargs, "-Wno-unused-value");
}
}
islib = hasprefix(dir, "lib") || streq(dir, "cmd/cc") || streq(dir, "cmd/gc");
ispkg = hasprefix(dir, "pkg");
isgo = ispkg || streq(dir, "cmd/go") || streq(dir, "cmd/cgo");