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authorSam Ravnborg <sam@mars.(none)>2005-07-28 00:11:01 +0400
committerSam Ravnborg <sam@mars.(none)>2005-07-28 00:11:01 +0400
commitdb8c1a7b2ca25f37b1429c00e82d6568f86caec1 (patch)
tree346bee7ee9cc5929c897825c9a86cb303f945745
parent72ba47c1b293ae78f7d798b458bb9d3db65c7551 (diff)
downloadlinux-db8c1a7b2ca25f37b1429c00e82d6568f86caec1.tar.xz
kbuild: fix building external modules
kbuild failed to locate Makefile for external modules. This brought to my attention how the variables for directories have different values in different usage scenarios. Different kbuild usage scenarios: make - plain make in same directory where kernel source lives make O= - kbuild is told to store output files in another directory make M= - building an external module make O= M= - building an external module with kernel output seperate from src Value assigned to the different variables: |$(src) |$(obj) |$(srctree) |$(objtree) make |reldir to k src |as src |abs path to k src |abs path to k src make O= |reldir to k src |as src |abs path to k src |abs path to output dir make M= |abs path to src |as src |abs path to k src |abs path to k src make O= M= |abs path to src |as src |abs path to k src |abs path to k output path to kbuild file: make | $(srctree)/$(src), $(src) make O= | $(srctree)/$(src) make M= | $(src) make O= M= | $(src) From the table above it can be seen that the only good way to find the home directory of the kbuild file is to locate the one of the two variants that is an absolute path. If $(src) is an absolute path (starts with /) then use it, otherwise prefix $(src) with $(srctree). Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
-rw-r--r--scripts/Makefile.build4
-rw-r--r--scripts/Makefile.clean4
2 files changed, 4 insertions, 4 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 8f4f5a347767..506e3f3befe3 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -11,8 +11,8 @@ __build:
-include .config
# The filename Kbuild has precedence over Makefile
-include $(if $(wildcard $(srctree)/$(src)/Kbuild), \
- $(srctree)/$(src)/Kbuild, $(srctree)/$(src)/Makefile)
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
include scripts/Kbuild.include
include scripts/Makefile.lib
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 62351b630fab..8974ea5fc878 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -13,8 +13,8 @@ __clean:
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
# The filename Kbuild has precedence over Makefile
-include $(if $(wildcard $(srctree)/$(src)/Kbuild), \
- $(srctree)/$(src)/Kbuild, $(srctree)/$(src)/Makefile)
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
# Figure out what we need to build from the various variables
# ==========================================================================