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| author | Bernhard Rosenkränzer <bero@linaro.org> | 2017-02-23 00:08:21 +0100 |
|---|---|---|
| committer | Bernhard Rosenkränzer <bero@linaro.org> | 2017-02-23 21:49:50 +0100 |
| commit | 7cac5dcabbd143e3da7d9de98f0e1d29a13724df (patch) | |
| tree | a846b343f34339b17c16729130409156edddfbf4 | |
| parent | 5d7c81f78d2f4140eb788e270a350898e076a111 (diff) | |
| download | hikey-clang-7cac5dcabbd143e3da7d9de98f0e1d29a13724df.tar.gz | |
kbuild, LLVMLinux: Add support for generating LLVM bitcode files
Add rules to kbuild in order to generate LLVM bitcode files with the .ll
extension when using clang.
# from c code
CC=clang make kernel/pid.ll
# from asm code
CC=clang make arch/x86/kernel/preempt.ll
Author: Vinicius Tinti <viniciustinti@gmail.com>
Forward-ported-by: Bernhard Rosenkränzer <bero@linaro.org>
Signed-off-by: Bernhard Rosenkränzer <bero@linaro.org>
Signed-off-by: Behan Webster <behanw@converseincode.com>
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 8 | ||||
| -rw-r--r-- | scripts/Makefile.build | 14 |
3 files changed, 22 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore index c2ed4ecb0acd..0c39aa20b6ba 100644 --- a/.gitignore +++ b/.gitignore @@ -33,6 +33,7 @@ *.lzo *.patch *.gcno +*.ll modules.builtin Module.symvers *.dwo @@ -1377,7 +1377,9 @@ help: @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' @echo ' dir/ - Build all files in dir and below' - @echo ' dir/file.[ois] - Build specified target only' + @echo ' dir/file.[oisS] - Build specified target only' + @echo ' dir/file.ll - Build the LLVM bitcode file' + @echo ' (requires compiler support for LLVM bitcode generation)' @echo ' dir/file.lst - Build specified mixed source/assembly target only' @echo ' (requires a recent binutils and recent build (System.map))' @echo ' dir/file.ko - Build module including final link' @@ -1665,6 +1667,10 @@ endif $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) %.symtypes: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.ll: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.ll: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) # Modules /: prepare scripts FORCE diff --git a/scripts/Makefile.build b/scripts/Makefile.build index d883116ebaa4..e5a28da2e6fa 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -177,6 +177,20 @@ cmd_cc_symtypes_c = \ $(obj)/%.symtypes : $(src)/%.c FORCE $(call cmd,cc_symtypes_c) +# LLVM bitcode +# Generate .ll files from .s and .c +quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ + cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< + +$(obj)/%.ll: $(src)/%.c FORCE + $(call if_changed_dep,cc_ll_c) + +quiet_cmd_as_ll_S = CPP $(quiet_modtag) $@ + cmd_as_ll_S = $(CPP) $(a_flags) -o $@ $< + +$(obj)/%.ll: $(src)/%.S FORCE + $(call if_changed_dep,as_ll_S) + # C (.c) files # The C file is compiled and updated dependency information is generated. # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |