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[llvm-go] parameterize $GOPATH construction 

Summary:
To build llgo, you must currently ensure that llgo
is in the tools/llgo directory, due to a hard-coded
path in llvm-go.

To support the use of LLVM_EXTERNAL_LLGO_SOURCE_DIR,
we introduce a flag to llvm-go that enables the
caller to specify the paths to symlink in the
temporary $GOPATH.

Reviewers: pcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D21634

llvm-svn: 276829
This commit is contained in:
Andrew Wilkins 2016-07-27 03:21:51 +00:00
parent 5fdb3b89da
commit 5bf7d8102d
2 changed files with 26 additions and 5 deletions
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2
llvm/cmake/modules/AddLLVM.cmake
View File

@ -997,7 +997,7 @@ function(llvm_add_go_executable binary pkgpath)
endforeach(d)
set(ldflags "${CMAKE_EXE_LINKER_FLAGS}")
add_custom_command(OUTPUT ${binpath}
COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "go=${GO_EXECUTABLE}" "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}"
COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "go=${GO_EXECUTABLE}" "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}" "packages=${LLVM_GO_PACKAGES}"
${ARG_GOFLAGS} build -o ${binpath} ${pkgpath}
DEPENDS llvm-config ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX}
${llvmlibs} ${ARG_DEPENDS}

29
llvm/tools/llvm-go/llvm-go.go
View File

@ -35,7 +35,6 @@ type pkg struct {
var packages = []pkg{
{"bindings/go/llvm", "llvm.org/llvm/bindings/go/llvm"},
{"tools/llgo", "llvm.org/llgo"},
}
type compilerFlags struct {
@ -145,7 +144,7 @@ type (run_build_sh int)
`, flags.cpp, flags.cxx, flags.ld)
}
func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags string) {
func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags string, packages []pkg) {
args = addTag(args, "byollvm")
srcdir := llvmConfig("--src-root")
@ -162,7 +161,12 @@ func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, l
panic(err.Error())
}
err = os.Symlink(filepath.Join(srcdir, p.llvmpath), path)
abspath := p.llvmpath
if !filepath.IsAbs(abspath) {
abspath = filepath.Join(srcdir, abspath)
}
err = os.Symlink(abspath, path)
if err != nil {
panic(err.Error())
}
@ -242,6 +246,7 @@ func main() {
ldflags := os.Getenv("CGO_LDFLAGS")
gocmd := "go"
llgo := ""
packagesString := ""
flags := []struct {
name string
@ -253,6 +258,7 @@ func main() {
{"llgo", &llgo},
{"cppflags", &cppflags},
{"ldflags", &ldflags},
{"packages", &packagesString},
}
args := os.Args[1:]
@ -271,9 +277,24 @@ LOOP:
break
}
packages := packages
if packagesString != "" {
for _, field := range strings.Fields(packagesString) {
pos := strings.IndexRune(field, '=')
if pos == -1 {
fmt.Fprintf(os.Stderr, "invalid packages value %q, expected 'pkgpath=llvmpath [pkgpath=llvmpath ...]'\n", packagesString)
os.Exit(1)
}
packages = append(packages, pkg{
pkgpath: field[:pos],
llvmpath: field[pos+1:],
})
}
}
switch args[0] {
case "build", "get", "install", "run", "test":
runGoWithLLVMEnv(args, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags)
runGoWithLLVMEnv(args, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags, packages)
case "print-components":
printComponents()
case "print-config":