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| author | VinÃcius Tinti <viniciustinti@gmail.com> | 2017-04-24 22:04:58 +0200 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-04-25 01:13:52 +0200 |
| commit | 433db3e260bc8134d4a46ddf20b3668937e12556 (patch) | |
| tree | 2174c7cc5e16f1a275a8bfc456428099c94d2700 | |
| parent | kbuild: Add better clang cross build support (diff) | |
| download | linux-433db3e260bc8134d4a46ddf20b3668937e12556.tar.xz linux-433db3e260bc8134d4a46ddf20b3668937e12556.zip | |
kbuild: Add support to generate LLVM assembly files
Add rules to kbuild in order to generate LLVM assembly files with the .ll
extension when using clang.
# from c code
make CC=clang kernel/pid.ll
Signed-off-by: VinÃcius Tinti <viniciustinti@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | scripts/Makefile.build | 8 |
3 files changed, 14 insertions, 0 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 @@ -1373,6 +1373,8 @@ help: @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.ll - Build the LLVM assembly file' + @echo ' (requires compiler support for LLVM assembly 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' @@ -1557,6 +1559,7 @@ clean: $(clean-dirs) -o -name '*.symtypes' -o -name 'modules.order' \ -o -name modules.builtin -o -name '.tmp_*.o.*' \ -o -name '*.c.[012]*.*' \ + -o -name '*.ll' \ -o -name '*.gcno' \) -type f -print | xargs rm -f # Generate tags for editors @@ -1660,6 +1663,8 @@ 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 $@) # Modules /: prepare scripts FORCE diff --git a/scripts/Makefile.build b/scripts/Makefile.build index d883116ebaa4..e5f1425c601f 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -177,6 +177,14 @@ cmd_cc_symtypes_c = \ $(obj)/%.symtypes : $(src)/%.c FORCE $(call cmd,cc_symtypes_c) +# LLVM assembly +# Generate .ll files from .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) + # 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) |