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| author | Devon H. O'Dell <devon.odell@gmail.com> | 2010-05-21 17:31:18 -0700 |
|---|---|---|
| committer | Devon H. O'Dell <devon.odell@gmail.com> | 2010-05-21 17:31:18 -0700 |
| commit | ee4237d9e3fb90269242de043cf88ce325a67664 (patch) | |
| tree | 2b69ef4470c0606d6a7134b89e98c3ce64cd214b /src/cmd/cgo/main.go | |
| parent | 68f0e281a613e4025f77c7371fec4b41fef644a9 (diff) | |
| download | go-ee4237d9e3fb90269242de043cf88ce325a67664.tar.gz | |
cgo: better error for no C symbols
R=rsc, iant
CC=golang-dev, graeme.perrow
http://codereview.appspot.com/1193046
Committer: Russ Cox <rsc@golang.org>
Diffstat (limited to 'src/cmd/cgo/main.go')
| -rw-r--r-- | src/cmd/cgo/main.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cmd/cgo/main.go b/src/cmd/cgo/main.go index 070146c9a..ac82ae918 100644 --- a/src/cmd/cgo/main.go +++ b/src/cmd/cgo/main.go @@ -83,6 +83,11 @@ func main() { // Reset p.Preamble so that we don't end up with conflicting headers / defines p.Preamble = builtinProlog openProg(input, p) + + if len(p.Vardef) == 0 && len(p.Funcdef) == 0 && len(p.Enumdef) == 0 && len(p.Constdef) == 0 { + fatal("no C symbols were used in cgo file " + input) + } + for _, cref := range p.Crefs { // Convert C.ulong to C.unsigned long, etc. if expand, ok := expandName[cref.Name]; ok { |