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| author | John Rigby <john.rigby@linaro.org> | 2011-03-02 18:57:21 -0700 |
|---|---|---|
| committer | John Rigby <john.rigby@linaro.org> | 2011-08-21 23:21:19 -0600 |
| commit | f4aa2e33ca35d121cc7137a92b3c1a2b418ee37d (patch) | |
| tree | 3044ffc906029571384da7092764fae5fd4b1427 /scripts/mod/Makefile | |
| parent | dd7359c9d7b80c1e1468f2cd393ce7b2933fec17 (diff) | |
KBuild: Allow scripts/* to be cross compiled
Cross compiling the binaries in scripts/* is not possible
because various makefiles assume that $(obj)/whatever is
executable on the build host.
This patch introduces a new variable called KBUILD_SCRIPTROOT
that points to script/binaries to use while cross compiling.
Usage:
Build scripts for the build host:
make O=path/to/buildhost/buildscripts \
silentoldconfig prepare scripts
Then cross build script for target:
make O=path/to/target/buildscripts \
HOSTCC=$CROSS_COMPILE \
KBUILD_SCRIPTROOT=path/to/buildhost/buildscripts
silentoldconfig prepare scripts
This patch does not use KBUILD_SCRIPTROOT for all script invocations
it only redefines the following if KBUILD_SCRIPTROOT is defined.
scripts/Makefile.build
scripts/basic/fixdep --> $(KBUILD_SCRIPTROOT)/scripts/basic/fixdep
scripts/kconfig/Makefile
$(obj)/conf --> $(KBUILD_SCRIPTROOT)/scripts/kconfig/conf
scripts/mod/Makefile
$(obj)mk_elfconfig --> $(KBUILD_SCRIPTROOT)/scripts/mod/mk_elfconfig
Signed-off-by: John Rigby <john.rigby@linaro.org>
Diffstat (limited to 'scripts/mod/Makefile')
| -rw-r--r-- | scripts/mod/Makefile | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index ff954f8168c..258d4ba32d5 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,6 +1,12 @@ hostprogs-y := modpost mk_elfconfig always := $(hostprogs-y) empty.o +ifdef KBUILD_SCRIPTROOT +MKELFCONFIG = $(KBUILD_SCRIPTROOT)/scripts/mod/mk_elfconfig +else +MKELFCONFIG = $(obj)/mk_elfconfig +endif + modpost-objs := modpost.o file2alias.o sumversion.o # dependencies on generated files need to be listed explicitly @@ -8,9 +14,9 @@ modpost-objs := modpost.o file2alias.o sumversion.o $(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h quiet_cmd_elfconfig = MKELF $@ - cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@ + cmd_elfconfig = $(MKELFCONFIG) < $< > $@ -$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE +$(obj)/elfconfig.h: $(obj)/empty.o $(MKELFCONFIG) FORCE $(call if_changed,elfconfig) targets += elfconfig.h |