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authorPaul Smith <psmith@gnu.org>2006-03-05 17:14:10 -0500
committerSam Ravnborg <sam@mars.ravnborg.org>2006-03-05 18:09:51 -0500
commit4f1933620f57145212cdbb1ac6ce099eeeb21c5a (patch)
treec083cce1f0acedd92be2ac6eb5e6c49ebd84ac46 /arch/arm/boot
parent7b75b13cda8bd21e8636ea985f76e1ce5bd1a470 (diff)
kbuild: change kbuild to not rely on incorrect GNU make behavior
The kbuild system takes advantage of an incorrect behavior in GNU make. Once this behavior is fixed, all files in the kernel rebuild every time, even if nothing has changed. This patch ensures kbuild works with both the incorrect and correct behaviors of GNU make. For more details on the incorrect behavior, see: http://lists.gnu.org/archive/html/bug-make/2006-03/msg00003.html Changes in this patch: - Keep all targets that are to be marked .PHONY in a variable, PHONY. - Add .PHONY: $(PHONY) to mark them properly. - Remove any $(PHONY) files from the $? list when determining whether targets are up-to-date or not. Signed-off-by: Paul Smith <psmith@gnu.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'arch/arm/boot')
-rw-r--r--arch/arm/boot/Makefile5
-rw-r--r--arch/arm/boot/bootp/Makefile5
2 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile
index a174d63395ea..ec9c400c7f82 100644
--- a/arch/arm/boot/Makefile
+++ b/arch/arm/boot/Makefile
@@ -1,6 +1,9 @@
1# 1#
2# arch/arm/boot/Makefile 2# arch/arm/boot/Makefile
3# 3#
4# This file is included by the global makefile so that you can add your own
5# architecture-specific flags and dependencies.
6#
4# This file is subject to the terms and conditions of the GNU General Public 7# This file is subject to the terms and conditions of the GNU General Public
5# License. See the file "COPYING" in the main directory of this archive 8# License. See the file "COPYING" in the main directory of this archive
6# for more details. 9# for more details.
@@ -73,7 +76,7 @@ $(obj)/bootpImage: $(obj)/bootp/bootp FORCE
73 $(call if_changed,objcopy) 76 $(call if_changed,objcopy)
74 @echo ' Kernel: $@ is ready' 77 @echo ' Kernel: $@ is ready'
75 78
76.PHONY: initrd FORCE 79PHONY += initrd FORCE
77initrd: 80initrd:
78 @test "$(INITRD_PHYS)" != "" || \ 81 @test "$(INITRD_PHYS)" != "" || \
79 (echo This machine does not support INITRD; exit -1) 82 (echo This machine does not support INITRD; exit -1)
diff --git a/arch/arm/boot/bootp/Makefile b/arch/arm/boot/bootp/Makefile
index 8e8879b6b3d7..c394e305447c 100644
--- a/arch/arm/boot/bootp/Makefile
+++ b/arch/arm/boot/bootp/Makefile
@@ -1,6 +1,9 @@
1# 1#
2# linux/arch/arm/boot/bootp/Makefile 2# linux/arch/arm/boot/bootp/Makefile
3# 3#
4# This file is included by the global makefile so that you can add your own
5# architecture-specific flags and dependencies.
6#
4 7
5LDFLAGS_bootp :=-p --no-undefined -X \ 8LDFLAGS_bootp :=-p --no-undefined -X \
6 --defsym initrd_phys=$(INITRD_PHYS) \ 9 --defsym initrd_phys=$(INITRD_PHYS) \
@@ -21,4 +24,4 @@ $(obj)/kernel.o: arch/arm/boot/zImage FORCE
21 24
22$(obj)/initrd.o: $(INITRD) FORCE 25$(obj)/initrd.o: $(INITRD) FORCE
23 26
24.PHONY: $(INITRD) FORCE 27PHONY += $(INITRD) FORCE