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cmd/go: -buildmode=shared and cgo and -compiler gccgo don't work together #15885

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mwhudson opened this issue May 30, 2016 · 2 comments
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cmd/go: -buildmode=shared and cgo and -compiler gccgo don't work together #15885

mwhudson opened this issue May 30, 2016 · 2 comments
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@mwhudson
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This combination has probably never worked correctly, but my fix for #11739 broke it harder:

$ cat $GOPATH/src/pkgconfigcgo/p.go
package pkgconfigcgo

// #cgo pkg-config: libpng
// #include <png.h>
import "C"

func V() uint32 {
    return uint32(C.png_access_version_number())
}
$ go build -buildmode=shared -compiler gccgo pkgconfigcgo
# /tmp/go-build393723771/libpkgconfigcgo.so
/opt/opensource/gopath/pkg/gccgo_linux_amd64_fPIC/libpkgconfigcgo.a: member /opt/opensource/gopath/pkg/gccgo_linux_amd64_fPIC/libpkgconfigcgo.a(_cgo_flags) in archive is not an object
collect2: error: ld returned 1 exit status

gccgo's ldShared() needs to do (at least) some of the tricks its ld() method does wrt _cgo_flags and so on.

No rush for 1.7 – it's more important to me to get a fix into gccgo in Ubuntu.
@gopherbot
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CL https://golang.org/cl/23533 mentions this issue.

@gopherbot
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CL https://golang.org/cl/23537 mentions this issue.

@golang golang locked and limited conversation to collaborators May 31, 2017
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