Change in coreboot[master]: libpayload/Makefile: Improve object files list creation

[Jakub Czapiga (Code Review)]

Jakub Czapiga has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/59843 )

Change subject: libpayload/Makefile: Improve object files list creation
......................................................................

libpayload/Makefile: Improve object files list creation

This patch ports some parts of main coreboot Makefile to the libpayload
Makefile in order to improve object files creation.

Moreover, the coreboot source files are now accessible an will be
correctly compiled under libpayload build directory.

Change-Id: If1280c0a3f7e99aad2ecf8a0379a98af31ccefc3
Signed-off-by: Jakub Czapiga 
---
M payloads/libpayload/Makefile
1 file changed, 20 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/59843/1

diff --git a/payloads/libpayload/Makefile b/payloads/libpayload/Makefile
index 1da8c64..d55b6d7 100644
--- a/payloads/libpayload/Makefile
+++ b/payloads/libpayload/Makefile
@@ -29,6 +29,10 @@
 ## SUCH DAMAGE.
 ##

+ifneq ($(words $(CURDIR)),1)
+	$(error ERROR: Path to the main directory cannot contain spaces)
+endif
+
 ifeq ($(INNER_SCANBUILD),y)
 CC_real:=$(CC)
 endif
@@ -40,6 +44,7 @@
 export obj ?= build
 export objutil ?= $(obj)/util
 export objk := $(objutil)/lp_kconfig
+export absobj := $(abspath $(obj))

export KCONFIG_AUTOHEADER := $(obj)/config.h
 export KCONFIG_AUTOCONFIG := $(obj)/auto.conf
@@ -290,9 +295,11 @@
    	$(foreach item,$($(special)-y), $(call $(special)-handler,$(dir $(1)),$(item)))) \
    $(foreach class,$(classes), \
    	$(eval $(class)-srcs+= \
+			$$(subst $(absobj)/,$(obj)/, \
    		$$(subst $(top)/,, \
-			$$(abspath $$(addprefix $(dir $(1)),$$($(class)-y)))))) \
-	$(eval subdirs+=$$(subst $(CURDIR)/,,$$(abspath $$(addprefix $(dir $(1)),$$(subdirs-y)))))
+			$$(abspath $$(subst $(dir $(1))/,/,$$(addprefix $(dir $(1)),$$($(class)-y)))))))) \
+	$(eval subdirs+=$$(subst $(CURDIR)/,,$$(wildcard $$(abspath $$(addprefix $(dir $(1)),$$(subdirs-y))))))
+

# For each path in $(subdirs) call includemakefiles
 # Repeat until subdirs is empty
@@ -311,8 +318,15 @@
 include $(TOPLEVEL)/tests/Makefile.inc
 endif

-src-to-obj=$(addsuffix .$(1).o, $(basename $(addprefix $(obj)/, $($(1)-srcs))))
-$(foreach class,$(classes),$(eval $(class)-objs:=$(call src-to-obj,$(class))))
+# Converts one or more source file paths to the corresponding build/ paths.
+# $1 lib name
+# $2 file path (list)
+src-to-obj=\
+	$(addsuffix .$(1).o,\
+	$(basename \
+	$(addprefix $(obj)/,\
+	$(subst $(coreboottop)/,coreboot/,$(2)))))
+$(foreach class,$(classes),$(eval $(class)-objs:=$(call src-to-obj,$(class),$($(class)-srcs))))

allsrcs:=$(foreach var, $(addsuffix -srcs,$(classes)), $($(var)))
 allobjs:=$(foreach var, $(addsuffix -objs,$(classes)), $($(var)))
@@ -326,7 +340,7 @@
 # $4 additional dependencies
 ifn$(EMPTY)def $(1)-objs_$(2)_template
 de$(EMPTY)fine $(1)-objs_$(2)_template
-$(obj)/$$(1).$(1).o: $$(1).$(2) $(obj)/libpayload-config.h $(4)
+$$(call src-to-obj,$(1), $$(1).$(2)): $$(1).$(2) $(obj)/libpayload-config.h $(4)
    @printf "    CC         $$$$(subst $$$$(obj)/,,$$$$(@))\n"
    $(CC) $(3) -MMD $$$$(CFLAGS) $(EXTRA_CFLAGS) -c -o $$$$@ $$$$<
 en$(EMPTY)def
@@ -356,7 +370,7 @@
 $(shell mkdir -p $(KCONFIG_SPLITCONFIG) $(obj) $(objk)/lxdialog $(additional-dirs) $(alldirs))

cscope:
-	cscope -bR
+	cscope -bR -s$(coreboottop)/src/commonlib/bsd

doxy: doxygen
 doxygen: