platform_build/core/use_lld_setup.mk

#############################################################
## Set up flags based on LOCAL_USE_CLANG_LLD.
## Input variables: LOCAL_USE_CLANG_LLD
## Output variables: my_use_clang_lld
#############################################################

# Use LLD by default.
# Do not use LLD if LOCAL_USE_CLANG_LLD is false or 0
my_use_clang_lld := true
ifneq (,$(LOCAL_USE_CLANG_LLD))
  ifneq (,$(filter 0 false,$(LOCAL_USE_CLANG_LLD)))
    my_use_clang_lld := false
  endif
endif

# Do not use LLD for Darwin host executables or shared libraries.  See
# https://lld.llvm.org/AtomLLD.html for status of lld for Mach-O.
ifeq ($($(my_prefix)OS),darwin)
my_use_clang_lld := false
endif
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 2018-04-12 19:55:54 +02:00			`#############################################################`
Remove USE_CLANG_LLD[=false] Test: treehugger Change-Id: I6dd632e9501f82b22f3f0c084039808e37b37742 2018-10-22 04:46:36 +02:00			`## Set up flags based on LOCAL_USE_CLANG_LLD.`
			`## Input variables: LOCAL_USE_CLANG_LLD`
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 2018-04-12 19:55:54 +02:00			`## Output variables: my_use_clang_lld`
			`#############################################################`

Third try to enable clang lld as default linker. Note of existing configurations: * When lld is used, llvm-strip and llvm-objcopy are also used. * darwin host modules do not use lld. * lld can be disabled locally with use_clang_lld:false in Android.bp or LOCAL_USE_CLANG_LLD:=false in Android.mk. Bug: 73768157 Test: make checkbuild, boot and run bionic and system/core native tests Change-Id: I3067ff8021dd6e1598f2447b80aea66a3f7e1677 2018-06-12 19:50:10 +02:00			`# Use LLD by default.`
Remove USE_CLANG_LLD[=false] Test: treehugger Change-Id: I6dd632e9501f82b22f3f0c084039808e37b37742 2018-10-22 04:46:36 +02:00			`# Do not use LLD if LOCAL_USE_CLANG_LLD is false or 0`
Third try to enable clang lld as default linker. Note of existing configurations: * When lld is used, llvm-strip and llvm-objcopy are also used. * darwin host modules do not use lld. * lld can be disabled locally with use_clang_lld:false in Android.bp or LOCAL_USE_CLANG_LLD:=false in Android.mk. Bug: 73768157 Test: make checkbuild, boot and run bionic and system/core native tests Change-Id: I3067ff8021dd6e1598f2447b80aea66a3f7e1677 2018-06-12 19:50:10 +02:00			`my_use_clang_lld := true`
			`ifneq (,$(LOCAL_USE_CLANG_LLD))`
			`ifneq (,$(filter 0 false,$(LOCAL_USE_CLANG_LLD)))`
			`my_use_clang_lld := false`
			`endif`
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 2018-04-12 19:55:54 +02:00			`endif`
Disable LLD for Darwin host executables. * See upstream status of lld for Mach-O at https://lld.llvm.org/AtomLLD.html Bug: 73768157 Test: make checkbuild Change-Id: I20330bd59cc8b3d0ed0fa08d3f1c2be7b8656849 2018-04-24 01:20:10 +02:00
Use $(my_prefix)OS instead of HOST_CROSS_OS The latter is not module-specific and affects all host modules. Also remove the check for LOCAL_IS_HOST_MODULE and use $(my_prefix)OS. This should be future-proof, where may use different configurations of cross-compilations across Linux, Darwin, Windows. Test: m native Change-Id: I0a6255a8b83960ffb543b593d4a50d963be1de88 2018-06-27 19:35:42 +02:00			`# Do not use LLD for Darwin host executables or shared libraries. See`
			`# https://lld.llvm.org/AtomLLD.html for status of lld for Mach-O.`
			`ifeq ($($(my_prefix)OS),darwin)`
			`my_use_clang_lld := false`
			`endif`