r249199 - in /trunk: gcc/go/gofrontend/MERGE li...

[ian@gcc.gnu.org]

Author: ian
Date: Wed Jun 14 13:59:02 2017
New Revision: 249199

URL: https://gcc.gnu.org/viewcvs?rev=249199&root=gcc&view=rev
Log:
    cmd/cgo: make _cgo_flags consistent across runs
    
    The go tool will pass -I objdir as one of the flags, where objdir is
    the temporary build directory. Remove that from _cgo_flags: we don't
    need it, and it will be different each time.
    
    Sort the flags to avoid the unpredictable map iteration order.
    
    This matters for gccgo because for a package that uses cgo, the go
    tool when building for gccgo will store the _cgo_flags file in the
    archive. That means that we want to generate identical _cgo_flags for
    every run.
    
    The test for this is the cmd/go testsuite, to follow in a future CL.
    
    Reviewed-on: https://go-review.googlesource.com/45692

Modified:
    trunk/gcc/go/gofrontend/MERGE
    trunk/libgo/go/cmd/cgo/gcc.go
    trunk/libgo/go/cmd/cgo/out.go