[PATCH 03/43] tools build: Add subdir support

From: Arnaldo Carvalho de Melo
Date: Fri Feb 13 2015 - 16:00:47 EST

From: Jiri Olsa <jolsa@xxxxxxxxxx>

Add support to make directory any time we build objects out of the tree
(O=/tmp/krava) and the output directory does not exist.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Tested-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Tested-by: Will Deacon <will.deacon@xxxxxxx>
Cc: Alexis Berlemont <alexis.berlemont@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-h80ukls4o2kpr0e4c4bfln6u@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/build/Makefile.build | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
index 35174d920476..692e1b154200 100644
--- a/tools/build/Makefile.build
+++ b/tools/build/Makefile.build
@@ -37,6 +37,11 @@ subdir-obj-y :=
build-file := $(dir)/Build
include $(build-file)

+# Create directory unless it exists
+quiet_cmd_mkdir = MKDIR $(dir $@)
+ cmd_mkdir = mkdir -p $(dir $@)
+ rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))
# Compile command
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
@@ -49,9 +54,11 @@ quiet_cmd_ld_multi = LD $@

# Build rules
$(OUTPUT)%.o: %.c FORCE
+ $(call rule_mkdir)
$(call if_changed_dep,cc_o_c)

+ $(call rule_mkdir)
$(call if_changed_dep,cc_o_c)

# Gather build data:

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