StrixOS/build_soong
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Add USE_CLANG_LLD and use_clang_lld.

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* USE_CLANG_LLD is unedefined in current builds.
* When USE_CLANG_LLD is defined to 'true' or '1',
  use clang's lld instead of ld or ld.gold.
* When lld is enabled:
  * ld-only flags are not passed to 'lld'.
  * location_packer is disabled.
  * Use new lld's --pack-dyn-relocs=android.
* When lld does not work:
  * In Android.mk files use LOCAL_USE_CLANG_LLD := false.
  * In Android.bp files use use_clang_lld: false.
* Only arm, arm64, x86, and x86_64_devices have LLD flags;
  all other hosts and targets do not call lld yet.

Bug: 73768157
Test: make checkbuild and boot
Change-Id: I06b8a1e868a600997a7e70fe05c299d751d23d5f
This commit is contained in:
Chih-Hung Hsieh
2018-04-03 11:33:34 -07:00
parent 18f568f651
commit 02b4da53a7
20 changed files with 178 additions and 4 deletions
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10
cc/config/global.go
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@@ -87,12 +87,20 @@ var (
"-Wl,--no-undefined-version",
}
deviceGlobalLldflags = append(ClangFilterUnknownLldflags(deviceGlobalLdflags),
[]string{
"-Wl,--pack-dyn-relocs=android",
"-fuse-ld=lld",
}...)
hostGlobalCflags = []string{}
hostGlobalCppflags = []string{}
hostGlobalLdflags = []string{}
hostGlobalLldflags = []string{}
commonGlobalCppflags = []string{
"-Wsign-promo",
}
@@ -141,9 +149,11 @@ func init() {
pctx.StaticVariable("DeviceGlobalCflags", strings.Join(deviceGlobalCflags, " "))
pctx.StaticVariable("DeviceGlobalCppflags", strings.Join(deviceGlobalCppflags, " "))
pctx.StaticVariable("DeviceGlobalLdflags", strings.Join(deviceGlobalLdflags, " "))
pctx.StaticVariable("DeviceGlobalLldflags", strings.Join(deviceGlobalLldflags, " "))
pctx.StaticVariable("HostGlobalCflags", strings.Join(hostGlobalCflags, " "))
pctx.StaticVariable("HostGlobalCppflags", strings.Join(hostGlobalCppflags, " "))
pctx.StaticVariable("HostGlobalLdflags", strings.Join(hostGlobalLdflags, " "))
pctx.StaticVariable("HostGlobalLldflags", strings.Join(hostGlobalLldflags, " "))
pctx.StaticVariable("NoOverrideGlobalCflags", strings.Join(noOverrideGlobalCflags, " "))
pctx.StaticVariable("CommonGlobalCppflags", strings.Join(commonGlobalCppflags, " "))