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| author | Ian Lance Taylor <iant@golang.org> | 2018-06-26 06:40:26 -0700 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2018-06-26 14:39:02 +0000 |
| commit | 5fad09016b172cd70a8e47b0f1ed0db07d1ebd17 (patch) | |
| tree | ba87685e852b24a20d98c792e070e92f8e39919c | |
| parent | 97fa89497db21823fd13da319915349b13891d46 (diff) | |
| download | go-5fad09016b172cd70a8e47b0f1ed0db07d1ebd17.tar.gz go-5fad09016b172cd70a8e47b0f1ed0db07d1ebd17.zip | |
cmd/cgo: mention character restrictions on #cgo lines
Fixes #26025
Change-Id: I43b3c9019ca8d2844e4d664c2090e506b2171077
Reviewed-on: https://go-review.googlesource.com/120975
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
| -rw-r--r-- | src/cmd/cgo/doc.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cmd/cgo/doc.go b/src/cmd/cgo/doc.go index 332b5670cc..4bd82ebd12 100644 --- a/src/cmd/cgo/doc.go +++ b/src/cmd/cgo/doc.go @@ -64,6 +64,11 @@ a full argument: to allow -mfoo=bar, use CGO_CFLAGS_ALLOW='-mfoo.*', not just CGO_CFLAGS_ALLOW='-mfoo'. Similarly named variables control the allowed CPPFLAGS, CXXFLAGS, FFLAGS, and LDFLAGS. +Also for security reasons, only a limited set of characters are +permitted, notably alphanumeric characters and a few symbols, such as +'.', that will not be interpreted in unexpected ways. Attempts to use +forbidden characters will get a "malformed #cgo argument" error. + When building, the CGO_CFLAGS, CGO_CPPFLAGS, CGO_CXXFLAGS, CGO_FFLAGS and CGO_LDFLAGS environment variables are added to the flags derived from these directives. Package-specific flags should be set using the |