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cmd/go: add -asmflags build flag

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We need this in order to pass the "-shared" flag to the assembler.

Change-Id: I9c15cfe4d32c1e5e8cae1b9b2c924cfd77923b55
Reviewed-on: https://go-review.googlesource.com/7694
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Srdjan Petrovic 2015-03-17 11:57:11 -07:00 committed by Ian Lance Taylor
parent 8da54a4eec
commit 71756355dc
2 changed files with 15 additions and 3 deletions
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10
src/cmd/go/build.go
View File

@ -88,6 +88,8 @@ and test commands:
or, if set explicitly, has _race appended to it.
-ldflags 'flag list'
arguments to pass on each 5l, 6l, 8l, or 9l linker invocation.
-asmflags 'flag list'
arguments to pass on each asm assembler invocation.
-tags 'tag list'
a list of build tags to consider satisfied during the build.
For more information about build tags, see the description of
@ -137,6 +139,7 @@ var buildX bool // -x flag
var buildI bool // -i flag
var buildO = cmdBuild.Flag.String("o", "", "output file")
var buildWork bool // -work flag
var buildAsmflags []string // -asmflags flag
var buildGcflags []string // -gcflags flag
var buildLdflags []string // -ldflags flag
var buildGccgoflags []string // -gccgoflags flag
@ -188,6 +191,7 @@ func addBuildFlags(cmd *Command) {
cmd.Flag.BoolVar(&buildV, "v", false, "")
cmd.Flag.BoolVar(&buildX, "x", false, "")
cmd.Flag.BoolVar(&buildWork, "work", false, "")
cmd.Flag.Var((*stringsFlag)(&buildAsmflags), "asmflags", "")
cmd.Flag.Var((*stringsFlag)(&buildGcflags), "gcflags", "")
cmd.Flag.Var((*stringsFlag)(&buildLdflags), "ldflags", "")
cmd.Flag.Var((*stringsFlag)(&buildGccgoflags), "gccgoflags", "")
@ -1705,11 +1709,13 @@ func (gcToolchain) asm(b *builder, p *Package, obj, ofile, sfile string) error {
// Add -I pkg/GOOS_GOARCH so #include "textflag.h" works in .s files.
inc := filepath.Join(goroot, "pkg", "include")
sfile = mkAbs(p.Dir, sfile)
args := []interface{}{buildToolExec, tool("asm"), "-o", ofile, "-trimpath", b.work, "-I", obj, "-I", inc, "-D", "GOOS_" + goos, "-D", "GOARCH_" + goarch, sfile}
args := []interface{}{buildToolExec, tool("asm"), "-o", ofile, "-trimpath", b.work, "-I", obj, "-I", inc, "-D", "GOOS_" + goos, "-D", "GOARCH_" + goarch, buildAsmflags, sfile}
if err := b.run(p.Dir, p.ImportPath, nil, args...); err != nil {
return err
}
if verifyAsm && goarch != "arm64" {
// Disable checks when additional flags are passed, as the old assemblers
// don't implement some of them (e.g., -shared).
if verifyAsm && goarch != "arm64" && len(buildAsmflags) == 0 {
if err := toolVerify(b, p, "old"+archChar()+"a", ofile, args); err != nil {
return err
}

8
src/cmd/go/doc.go
View File

@ -81,7 +81,8 @@ and test commands:
print the commands but do not run them.
-p n
the number of builds that can be run in parallel.
The default is the number of CPUs available.
The default is the number of CPUs available, except
on darwin/arm which defaults to 1.
-race
enable data race detection.
Supported only on linux/amd64, freebsd/amd64, darwin/amd64 and windows/amd64.
@ -106,6 +107,8 @@ and test commands:
or, if set explicitly, has _race appended to it.
-ldflags 'flag list'
arguments to pass on each 5l, 6l, 8l, or 9l linker invocation.
-asmflags 'flag list'
arguments to pass on each asm assembler invocation.
-tags 'tag list'
a list of build tags to consider satisfied during the build.
For more information about build tags, see the description of
@ -931,6 +934,9 @@ system.
- "std" is like all but expands to just the packages in the standard
Go library.
- "cmd" expands to the Go repository's commands and their
internal libraries.
An import path is a pattern if it includes one or more "..." wildcards,
each of which can match any string, including the empty string and
strings containing slashes. Such a pattern expands to all package