It is tedious to specify extra compiler options for every file. HOST_EXTRACFLAGS is useful to add options to all files in a directory.
-I$(src)/libfdt is needed for all the files in this directory to include libfdt_env.h etc. from scripts/dtc/libfdt/. On the other hand, -I$(src) is used to include check-in headers from generated C files. Thus, I added it only to dtc-lexer.lex.o and dtc-parser.tab.o . Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com> --- scripts/dtc/Makefile | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile index 9cac65b..1c943e0 100644 --- a/scripts/dtc/Makefile +++ b/scripts/dtc/Makefile @@ -9,21 +9,11 @@ dtc-objs := dtc.o flattree.o fstree.o data.o livetree.o treesource.o \ dtc-objs += dtc-lexer.lex.o dtc-parser.tab.o # Source files need to get at the userspace version of libfdt_env.h to compile +HOST_EXTRACFLAGS := -I$(src)/libfdt -HOSTCFLAGS_DTC := -I$(src) -I$(src)/libfdt - -HOSTCFLAGS_checks.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_data.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_dtc.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_flattree.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_fstree.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_livetree.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_srcpos.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_treesource.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_util.o := $(HOSTCFLAGS_DTC) - -HOSTCFLAGS_dtc-lexer.lex.o := $(HOSTCFLAGS_DTC) -HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC) +# Generated files need one more search path to include headers in source tree +HOSTCFLAGS_dtc-lexer.lex.o := -I$(src) +HOSTCFLAGS_dtc-parser.tab.o := -I$(src) # dependencies on generated files need to be listed explicitly $(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h -- 2.7.4
