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add CGO_CFLAGS support #5453

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add CGO_CFLAGS support #5453

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d59fad0
add CGO_CFLAGS support
hectorchu Jun 8, 2026
382252a
the environment variable must be split
hectorchu Jun 9, 2026
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2 changes: 2 additions & 0 deletions goenv/goenv.go
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,8 @@ func Get(name string) string {
panic("could not find cache dir: " + err.Error())
}
return filepath.Join(dir, "tinygo")
case "CGO_CFLAGS":
return os.Getenv("CGO_CFLAGS")
case "CGO_ENABLED":
// Always enable CGo. It is required by a number of targets, including
// macOS and the rp2040.
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1 change: 1 addition & 0 deletions loader/loader.go
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Expand Up @@ -508,6 +508,7 @@ func (p *Package) parseFiles() ([]*ast.File, error) {
var initialCFlags []string
initialCFlags = append(initialCFlags, p.program.config.CFlags(true)...)
initialCFlags = append(initialCFlags, "-I"+p.Dir)
initialCFlags = append(initialCFlags, goenv.Get("CGO_CFLAGS"))
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generated, headerCode, cflags, ldflags, accessedFiles, errs := cgo.Process(files, p.program.workingDir, p.ImportPath, p.program.fset, initialCFlags, p.program.config.GOOS())
p.CFlags = append(initialCFlags, cflags...)
p.CGoHeaders = headerCode
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