kbuild: wire up the build rule of compile_commands.json to Makefile

[linux-2.6-microblaze.git] / Makefile

diff --git a/Makefile b/Makefile
index d96f2fe..07fd96a 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -634,7 +634,7 @@ endif
 # in addition to whatever we do anyway.
 # Just "make" or "make all" shall build modules as well
 
-ifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),)
+ifneq ($(filter all modules nsdeps %compile_commands.json,$(MAKECMDGOALS)),)
   KBUILD_MODULES := 1
 endif
 
@@ -1470,7 +1470,8 @@ endif # CONFIG_MODULES
 
 # Directories & files removed with 'make clean'
 CLEAN_FILES += include/ksym vmlinux.symvers \
-              modules.builtin modules.builtin.modinfo modules.nsdeps
+              modules.builtin modules.builtin.modinfo modules.nsdeps \
+              compile_commands.json
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_FILES += include/config include/generated          \
@@ -1704,9 +1705,12 @@ KBUILD_MODULES := 1
 
 build-dirs := $(KBUILD_EXTMOD)
 PHONY += modules
-modules: descend
+modules: $(MODORDER)
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
+$(MODORDER): descend
+       @:
+
 PHONY += modules_install
 modules_install: _emodinst_ _emodinst_post
 
@@ -1720,8 +1724,12 @@ PHONY += _emodinst_post
 _emodinst_post: _emodinst_
        $(call cmd,depmod)
 
+compile_commands.json: $(extmod-prefix)compile_commands.json
+PHONY += compile_commands.json
+
 clean-dirs := $(KBUILD_EXTMOD)
-clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
+clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
+       $(KBUILD_EXTMOD)/compile_commands.json
 
 PHONY += help
 help:
@@ -1834,6 +1842,19 @@ nsdeps: export KBUILD_NSDEPS=1
 nsdeps: modules
        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
 
+# Clang Tooling
+# ---------------------------------------------------------------------------
+
+quiet_cmd_gen_compile_commands = GEN     $@
+      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
+
+$(extmod-prefix)compile_commands.json: scripts/gen_compile_commands.py \
+       $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
+       $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
+       $(call if_changed,gen_compile_commands)
+
+targets += $(extmod-prefix)compile_commands.json
+
 # Scripts to check various things for consistency
 # ---------------------------------------------------------------------------