Add USE_CLANG_LLD and use_clang_lld.
* 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
diff --git a/cc/config/x86_64_device.go b/cc/config/x86_64_device.go
index 12f3e6f..ba03094 100644
--- a/cc/config/x86_64_device.go
+++ b/cc/config/x86_64_device.go
@@ -32,6 +32,8 @@
"-Wl,--hash-style=gnu",
}
+ x86_64Lldflags = ClangFilterUnknownLldflags(x86_64Ldflags)
+
x86_64ArchVariantCflags = map[string][]string{
"": []string{
"-march=x86-64",
@@ -125,12 +127,14 @@
pctx.StaticVariable("X86_64Cflags", strings.Join(x86_64Cflags, " "))
pctx.StaticVariable("X86_64Ldflags", strings.Join(x86_64Ldflags, " "))
+ pctx.StaticVariable("X86_64Lldflags", strings.Join(x86_64Lldflags, " "))
pctx.StaticVariable("X86_64Cppflags", strings.Join(x86_64Cppflags, " "))
pctx.StaticVariable("X86_64IncludeFlags", bionicHeaders("x86"))
// Clang cflags
pctx.StaticVariable("X86_64ClangCflags", strings.Join(ClangFilterUnknownCflags(x86_64Cflags), " "))
pctx.StaticVariable("X86_64ClangLdflags", strings.Join(ClangFilterUnknownCflags(x86_64Ldflags), " "))
+ pctx.StaticVariable("X86_64ClangLldflags", strings.Join(ClangFilterUnknownCflags(x86_64Lldflags), " "))
pctx.StaticVariable("X86_64ClangCppflags", strings.Join(ClangFilterUnknownCflags(x86_64Cppflags), " "))
// Yasm flags
@@ -215,6 +219,10 @@
return "${config.X86_64Ldflags}"
}
+func (t *toolchainX86_64) ClangLldflags() string {
+ return "${config.X86_64Lldflags}"
+}
+
func (t *toolchainX86_64) YasmFlags() string {
return "${config.X86_64YasmFlags}"
}