commit 32427d6903b2a32508eb7cc76c8e83ccea126be6
author Chih-Hung Hsieh <chh@google.com> Thu Apr 12 10:55:54 2018 -0700
committer Chih-Hung Hsieh <chh@google.com> Thu Apr 12 11:00:06 2018 -0700
tree 0c0b597efe66a7cedb605b7a40c2d6cb8519c6c2
parent f2fc1418d3338cde1dc5ccbcebd3061fca098d32

Add USE_CLANG_LLD and LOCAL_USE_CLANG_LLD

* Current default is not using lld.
* When USE_CLANG_LLD or LOCAL_USE_CLANG_LLD is true or 1,
  * Use *GLOBAL_LLDFLAGS instead of *GLOBAL_LDFLAGS.
    GLOBAL_LLDFLAGS should call lld and with correct lld flags.
  * set my_pack_module_relocations to false.

Bug: 73768157
Test: make checkbuild
Change-Id: I3e63cf8ae0865d01d2bc1f36e9304f4a5d092cb8

core/use_lld_setup.mk

diff --git a/core/use_lld_setup.mk b/core/use_lld_setup.mk
new file mode 100644
index 0000000..69ceddc
--- /dev/null
+++ b/core/use_lld_setup.mk
@@ -0,0 +1,14 @@
+#############################################################
+## Set up flags based on USE_CLANG_LLD and LOCAL_USE_CLANG_LLD.
+## Input variables: USE_CLANG_LLD,LOCAL_USE_CLANG_LLD.
+## Output variables: my_use_clang_lld
+#############################################################
+
+# Use LLD only if it's not disabled by LOCAL_USE_CLANG_LLD,
+# and enabled by LOCAL_USE_CLANG_LLD or USE_CLANG_LLD.
+my_use_clang_lld := false
+ifeq (,$(filter 0 false,$(LOCAL_USE_CLANG_LLD)))
+  ifneq (,$(filter 1 true,$(LOCAL_USE_CLANG_LLD) $(USE_CLANG_LLD)))
+    my_use_clang_lld := true
+  endif
+endif