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20 lines
808 B
Diff
20 lines
808 B
Diff
http://code.google.com/p/go/source/detail?r=8b13b2ec6b18
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--- a/src/cmd/cgo/gcc.go 2014-07-02 12:00:12.171796197 +0200
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+++ b/src/cmd/cgo/gcc.go 2014-07-02 12:01:57.844472754 +0200
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@@ -840,6 +840,15 @@
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func (p *Package) gccErrors(stdin []byte) string {
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// TODO(rsc): require failure
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args := p.gccCmd()
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+
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+ // GCC 4.8.0 has a bug: it sometimes does not apply
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+ // -Wunused-value to values that are macros defined in system
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+ // headers. See issue 5118. Adding -Wsystem-headers avoids
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+ // that problem. This will produce additional errors, but it
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+ // doesn't matter because we will ignore all errors that are
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+ // not marked for the cgo-test file.
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+ args = append(args, "-Wsystem-headers")
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+
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if *debugGcc {
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fmt.Fprintf(os.Stderr, "$ %s <<EOF\n", strings.Join(args, " "))
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os.Stderr.Write(stdin)
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