From: "Vinícius Tinti" <viniciustinti@gmail.com>
To: Michal Marek <mmarek@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Behan Webster <behanw@converseincode.com>,
Zhao Gang <gamerh2o@gmail.com>, Borislav Petkov <bp@suse.de>,
Andi Kleen <ak@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
"Vinícius Tinti" <viniciustinti@gmail.com>
Subject: [PATCH v3] kbuild: add support to generate LLVM bitcode files
Date: Thu, 11 Sep 2014 20:13:00 -0300 [thread overview]
Message-ID: <1410477180-1328-1-git-send-email-viniciustinti@gmail.com> (raw)
In-Reply-To: <CALD9WKzGmCeCPdwO4hCMtAjEjFoB8=oiQjUktT4PN4ewtDY7XA@mail.gmail.com>
Allows kbuild to generate LLVM bitcode files using '.ll' suffix.
# from c code
CC=clang make kernel/pid.ll
# from asm code
CC=clang make arch/x86/kernel/preempt.ll
Signed-off-by: Vinícius Tinti <viniciustinti@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
---
.gitignore | 1 +
Makefile | 6 ++++++
scripts/Makefile.build | 14 ++++++++++++++
3 files changed, 21 insertions(+)
diff --git a/.gitignore b/.gitignore
index e213b27..823b9d6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,6 +32,7 @@
*.lzo
*.patch
*.gcno
+*.ll
modules.builtin
Module.symvers
*.dwo
diff --git a/Makefile b/Makefile
index 1a60bdd..cd4a120 100644
--- a/Makefile
+++ b/Makefile
@@ -1250,6 +1250,8 @@ help:
@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
@echo ' dir/ - Build all files in dir and below'
@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'
@@ -1526,6 +1528,10 @@ 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 bf3e677..4d97e4f 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -174,6 +174,20 @@ 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)
--
2.1.0
next prev parent reply other threads:[~2014-09-11 23:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-19 1:34 [PATCH] kbuild: add support to generate LLVM bitcode files Vinícius Tinti
2014-07-20 10:02 ` Sam Ravnborg
2014-07-20 21:04 ` Sam Ravnborg
2014-07-20 21:30 ` Sam Ravnborg
2014-07-21 22:42 ` Tinti
2014-07-22 0:35 ` Sam Ravnborg
2014-07-23 11:56 ` [PATCH v2] " Vinícius Tinti
2014-07-23 12:00 ` Tinti
2014-09-11 23:13 ` Vinícius Tinti [this message]
2017-04-04 17:27 [PATCH v3] kbuild: Add " Matthias Kaehlcke
2017-04-20 18:04 ` Matthias Kaehlcke
2017-04-21 5:02 ` Masahiro Yamada
2017-04-21 19:55 ` Matthias Kaehlcke
2017-04-23 6:57 ` Masahiro Yamada
2017-04-24 2:21 ` Masahiro Yamada
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