Bug 215603

Summary:	Support go toolchain builds that default to CGO_ENABLED=0
Product:	Tools	Reporter:	Andrew G. Morgan (morgan)
Component:	libcap	Assignee:	Andrew G. Morgan (morgan)
Status:	RESOLVED CODE_FIX
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	n/a	Subsystem:
Regression:	No	Bisected commit-id:

Description Andrew G. Morgan 2022-02-14 03:17:21 UTC

I've been experimenting with the go1.18 build tree ( to try to resolve https://github.com/golang/go/issues/50113 ) and it would appear that this version of GO has returned to CGO_ENABLED=0 being the default build mode.

This causes the libcap/go/compare-cap.go build test to fail:

$ make GO=~/gohacks/go/bin/go clean -C go compare-cap
[...]
go: no Go source files
make: *** [Makefile:58: compare-cap] Error 1

$ cd go
$ make GO=~/gohacks/go/bin/go all test
[failure again, but dependencies set up..]
$ CGO_ENABLED=1 CC="gcc"  CGO_CFLAGS="-I$HOME/gits/libcap/libcap/include/uapi -I$HOME/gits/libcap/libcap/include" CGO_LDFLAGS="-L$HOME/gits/libcap/libcap" ~/gohacks/go/bin/go build  -mod=vendor compare-cap.go
$

That is, if I force CGO_ENABLED=1 the compilation work.

$ go version ; go env CGO_ENABLED
go version go1.16.13 linux/amd64
1
$ ~/gohacks/go/bin/go version ; ~/gohacks/go/bin/go env CGO_ENABLED
go version devel go1.18-7fa52d74f2 Sun Feb 13 13:42:41 2022 -0800 linux/amd64
0

Comment 1 Andrew G. Morgan 2022-02-14 04:06:07 UTC

This is fixed with:

https://git.kernel.org/pub/scm/libs/libcap/libcap.git/commit/?id=aae937481ae28c0cfe502309e9acb5c34ba0b2cd

Comment 2 Andrew G. Morgan 2022-04-10 15:20:21 UTC

For the record, the setup was slightly different. The Go team have not changed the default build characteristics of Go to CGO_ENABLED=0. Instead, I was building the Go build tree with that configuration (to run its in-build tests with CGO_ENABLED=0), and that causes the built compiler to default to CGO_ENABLED=0.

Comment 3 Andrew G. Morgan 2022-11-08 15:08:45 UTC

I've updated the bug title to reflect the actual issue.