b3b8d2bfeb
Fix a build failure when bootstrapping the Go compiler with go-bootstrap 1.4
while the environment contains GOARCH=riscv64.
Building Go toolchain1 using go-1.4-bootstrap-20171003.
src/cmd/compile/internal/ssa/rewriteRISCV64.go:4814
invalid operation: y << x (shift count type int64, must be unsigned integer)
This is because:
- buildtool.go:198: calls bootstrapRewriteFile(src)
- bootstrapRewriteFile: buildtool.go:283 calls:
- isUnneededSSARewriteFile: checks os.Getenv("GOARCH")
- isUnneededSSARewriteFile: returns "", false
- bootstrapRewriteFile: calls bootstrapFixImports
- boostrapFixImports: generates code go1.4 cannot compile
Instead of checking "GOARCH" in the environment, use the gohostarch variable.
Change-Id: Ie9c190498555c4068461fead6278a62e924062c6
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