diff options
Diffstat (limited to 'src/cmd/go/build.go')
| -rw-r--r-- | src/cmd/go/build.go | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/src/cmd/go/build.go b/src/cmd/go/build.go index 38fc43ef1..e7f3fb5bb 100644 --- a/src/cmd/go/build.go +++ b/src/cmd/go/build.go @@ -40,9 +40,13 @@ build writes the resulting executable to output. Otherwise build compiles the packages but discards the results, serving only as a check that the packages can be built. -The -o flag specifies the output file name. If not specified, the -name is packagename.a (for a non-main package) or the base -name of the first source file (for a main package). +The -o flag specifies the output file name. If not specified, the +output file name depends on the arguments and derives from the name +of the package, such as p.a for package p, unless p is 'main'. If +the package is main and file names are provided, the file name +derives from the first file name mentioned, such as f1 for 'go build +f1.go f2.go'; with no files provided ('go build'), the output file +name is the base name of the containing directory. The build flags are shared by the build, install, run, and test commands: @@ -53,6 +57,9 @@ The build flags are shared by the build, install, run, and test commands: -p n the number of builds that can be run in parallel. The default is the number of CPUs available. + -race + enable data race detection. + Supported only on linux/amd64, darwin/amd64 and windows/amd64. -v print the names of packages as they are compiled. -work @@ -60,20 +67,22 @@ The build flags are shared by the build, install, run, and test commands: do not delete it when exiting. -x print the commands. - -race - enable data race detection. - Supported only on linux/amd64, darwin/amd64 and windows/amd64. -ccflags 'arg list' - arguments to pass on each 5c, 6c, or 8c compiler invocation + arguments to pass on each 5c, 6c, or 8c compiler invocation. -compiler name - name of compiler to use, as in runtime.Compiler (gccgo or gc) + name of compiler to use, as in runtime.Compiler (gccgo or gc). -gccgoflags 'arg list' - arguments to pass on each gccgo compiler/linker invocation + arguments to pass on each gccgo compiler/linker invocation. -gcflags 'arg list' - arguments to pass on each 5g, 6g, or 8g compiler invocation + arguments to pass on each 5g, 6g, or 8g compiler invocation. + -installsuffix suffix + a suffix to use in the name of the package installation directory, + in order to keep output separate from default builds. + If using the -race flag, the install suffix is automatically set to race + or, if set explicitly, has _race appended to it. -ldflags 'flag list' - arguments to pass on each 5l, 6l, or 8l linker invocation + arguments to pass on each 5l, 6l, or 8l linker invocation. -tags 'tag list' a list of build tags to consider satisfied during the build. See the documentation for the go/build package for @@ -153,6 +162,7 @@ func addBuildFlags(cmd *Command) { cmd.Flag.BoolVar(&buildA, "a", false, "") cmd.Flag.BoolVar(&buildN, "n", false, "") cmd.Flag.IntVar(&buildP, "p", buildP, "") + cmd.Flag.StringVar(&buildContext.InstallSuffix, "installsuffix", "", "") cmd.Flag.BoolVar(&buildV, "v", false, "") cmd.Flag.BoolVar(&buildX, "x", false, "") cmd.Flag.BoolVar(&buildWork, "work", false, "") @@ -391,7 +401,9 @@ var ( func (b *builder) init() { var err error - b.print = fmt.Print + b.print = func(a ...interface{}) (int, error) { + return fmt.Fprint(os.Stderr, a...) + } b.actionCache = make(map[cacheKey]*action) b.mkdirCache = make(map[string]bool) @@ -1289,7 +1301,6 @@ func (b *builder) runOut(dir string, desc string, cmdargs ...interface{}) ([]byt return buf.Bytes(), err } - panic("unreachable") } // mkdir makes the named directory. @@ -1632,7 +1643,7 @@ func (b *builder) libgcc(p *Package) (string, error) { // print function to capture the command-line. This // let's us assign it to $LIBGCC and produce a valid // buildscript for cgo packages. - b.print = func(a ...interface{}) (n int, err error) { + b.print = func(a ...interface{}) (int, error) { return fmt.Fprint(&buf, a...) } } @@ -2083,6 +2094,9 @@ func raceInit() { buildGcflags = append(buildGcflags, "-race") buildLdflags = append(buildLdflags, "-race") buildCcflags = append(buildCcflags, "-D", "RACE") - buildContext.InstallTag = "race" + if buildContext.InstallSuffix != "" { + buildContext.InstallSuffix += "_" + } + buildContext.InstallSuffix += "race" buildContext.BuildTags = append(buildContext.BuildTags, "race") } |