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// Copyright 2016 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cc
import (
"android/soong/common"
"fmt"
)
type StlProperties struct {
// select the STL library to use. Possible values are "libc++", "libc++_static",
// "stlport", "stlport_static", "ndk", "libstdc++", or "none". Leave blank to select the
// default
Stl string
SelectedStl string `blueprint:"mutated"`
}
type stlFeature struct {
Properties StlProperties
}
var _ feature = (*stlFeature)(nil)
func (stl *stlFeature) props() []interface{} {
return []interface{}{&stl.Properties}
}
func (stl *stlFeature) begin(ctx BaseModuleContext) {
stl.Properties.SelectedStl = func() string {
if ctx.sdk() && ctx.Device() {
switch stl.Properties.Stl {
case "":
return "ndk_system"
case "c++_shared", "c++_static",
"stlport_shared", "stlport_static",
"gnustl_static":
return "ndk_lib" + stl.Properties.Stl
default:
ctx.ModuleErrorf("stl: %q is not a supported STL with sdk_version set", stl.Properties.Stl)
return ""
}
} else if ctx.HostType() == common.Windows {
switch stl.Properties.Stl {
case "libc++", "libc++_static", "libstdc++", "":
// libc++ is not supported on mingw
return "libstdc++"
case "none":
return ""
default:
ctx.ModuleErrorf("stl: %q is not a supported STL", stl.Properties.Stl)
return ""
}
} else {
switch stl.Properties.Stl {
case "libc++", "libc++_static",
"libstdc++":
return stl.Properties.Stl
case "none":
return ""
case "":
if ctx.static() {
return "libc++_static"
} else {
return "libc++"
}
default:
ctx.ModuleErrorf("stl: %q is not a supported STL", stl.Properties.Stl)
return ""
}
}
}()
}
func (stl *stlFeature) deps(ctx BaseModuleContext, deps Deps) Deps {
switch stl.Properties.SelectedStl {
case "libstdc++":
if ctx.Device() {
deps.SharedLibs = append(deps.SharedLibs, stl.Properties.SelectedStl)
}
case "libc++", "libc++_static":
if stl.Properties.SelectedStl == "libc++" {
deps.SharedLibs = append(deps.SharedLibs, stl.Properties.SelectedStl)
} else {
deps.StaticLibs = append(deps.StaticLibs, stl.Properties.SelectedStl)
}
if ctx.Device() {
if ctx.Arch().ArchType == common.Arm {
deps.StaticLibs = append(deps.StaticLibs, "libunwind_llvm")
}
if ctx.staticBinary() {
deps.StaticLibs = append(deps.StaticLibs, "libdl")
} else {
deps.SharedLibs = append(deps.SharedLibs, "libdl")
}
}
case "":
// None or error.
case "ndk_system":
// TODO: Make a system STL prebuilt for the NDK.
// The system STL doesn't have a prebuilt (it uses the system's libstdc++), but it does have
// its own includes. The includes are handled in CCBase.Flags().
deps.SharedLibs = append([]string{"libstdc++"}, deps.SharedLibs...)
case "ndk_libc++_shared", "ndk_libstlport_shared":
deps.SharedLibs = append(deps.SharedLibs, stl.Properties.SelectedStl)
case "ndk_libc++_static", "ndk_libstlport_static", "ndk_libgnustl_static":
deps.StaticLibs = append(deps.StaticLibs, stl.Properties.SelectedStl)
default:
panic(fmt.Errorf("Unknown stl: %q", stl.Properties.SelectedStl))
}
return deps
}
func (stl *stlFeature) flags(ctx ModuleContext, flags Flags) Flags {
switch stl.Properties.SelectedStl {
case "libc++", "libc++_static":
flags.CFlags = append(flags.CFlags, "-D_USING_LIBCXX")
if ctx.Host() {
flags.CppFlags = append(flags.CppFlags, "-nostdinc++")
flags.LdFlags = append(flags.LdFlags, "-nodefaultlibs")
flags.LdFlags = append(flags.LdFlags, "-lpthread", "-lm")
if ctx.staticBinary() {
flags.LdFlags = append(flags.LdFlags, hostStaticGccLibs[ctx.HostType()]...)
} else {
flags.LdFlags = append(flags.LdFlags, hostDynamicGccLibs[ctx.HostType()]...)
}
} else {
if ctx.Arch().ArchType == common.Arm {
flags.LdFlags = append(flags.LdFlags, "-Wl,--exclude-libs,libunwind_llvm.a")
}
}
case "libstdc++":
// Using bionic's basic libstdc++. Not actually an STL. Only around until the
// tree is in good enough shape to not need it.
// Host builds will use GNU libstdc++.
if ctx.Device() {
flags.CFlags = append(flags.CFlags, "-I"+common.PathForSource(ctx, "bionic/libstdc++/include").String())
} else {
// Host builds will use the system C++. libc++ on Darwin, GNU libstdc++ everywhere else
flags.CppFlags = append(flags.CppFlags, flags.Toolchain.SystemCppCppflags())
flags.LdFlags = append(flags.LdFlags, flags.Toolchain.SystemCppLdflags())
}
case "ndk_system":
ndkSrcRoot := common.PathForSource(ctx, "prebuilts/ndk/current/sources/cxx-stl/system/include")
flags.CFlags = append(flags.CFlags, "-isystem "+ndkSrcRoot.String())
case "ndk_libc++_shared", "ndk_libc++_static":
// TODO(danalbert): This really shouldn't be here...
flags.CppFlags = append(flags.CppFlags, "-std=c++11")
case "ndk_libstlport_shared", "ndk_libstlport_static", "ndk_libgnustl_static":
// Nothing
case "":
// None or error.
if ctx.Host() {
flags.CppFlags = append(flags.CppFlags, "-nostdinc++")
flags.LdFlags = append(flags.LdFlags, "-nodefaultlibs")
if ctx.staticBinary() {
flags.LdFlags = append(flags.LdFlags, hostStaticGccLibs[ctx.HostType()]...)
} else {
flags.LdFlags = append(flags.LdFlags, hostDynamicGccLibs[ctx.HostType()]...)
}
}
default:
panic(fmt.Errorf("Unknown stl: %q", stl.Properties.SelectedStl))
}
return flags
}
var hostDynamicGccLibs, hostStaticGccLibs map[common.HostType][]string
func init() {
hostDynamicGccLibs = map[common.HostType][]string{
common.Linux: []string{"-lgcc_s", "-lgcc", "-lc", "-lgcc_s", "-lgcc"},
common.Darwin: []string{"-lc", "-lSystem"},
common.Windows: []string{"-lmsvcr110", "-lmingw32", "-lgcc", "-lmoldname",
"-lmingwex", "-lmsvcrt", "-ladvapi32", "-lshell32", "-luser32",
"-lkernel32", "-lmingw32", "-lgcc", "-lmoldname", "-lmingwex",
"-lmsvcrt"},
}
hostStaticGccLibs = map[common.HostType][]string{
common.Linux: []string{"-Wl,--start-group", "-lgcc", "-lgcc_eh", "-lc", "-Wl,--end-group"},
common.Darwin: []string{"NO_STATIC_HOST_BINARIES_ON_DARWIN"},
common.Windows: []string{"NO_STATIC_HOST_BINARIES_ON_WINDOWS"},
}
}
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