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authorGeert Uytterhoeven <geert@linux-m68k.org>2014-08-08 17:23:08 +0200
committerMichal Marek <mmarek@suse.cz>2014-08-19 10:02:41 +0200
commitef80f0a1e033bcab17257e2155a3c9263a0919c1 (patch)
tree8244447e827edb2adfcd8263e5c2425508fdf1a5 /Documentation/kbuild/makefiles.txt
parentDocumentation: kbuild: Remove obsolete include/asm symlink step (diff)
downloadlinux-dev-ef80f0a1e033bcab17257e2155a3c9263a0919c1.tar.xz
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Documentation: kbuild: Improve if_changed documentation
- These days if_changed is used with many more commands than ld, objcopy, and gzip, hence add an ellipsis, - Any target that utilises if_changed must be listed in $(targets), so it needs an assignment to "targets", not "target". Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
-rw-r--r--Documentation/kbuild/makefiles.txt6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index a445e1c8828e..520b2c75bc56 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -1092,7 +1092,7 @@ When kbuild executes, the following steps are followed (roughly):
Usage:
target: source(s) FORCE
- $(call if_changed,ld/objcopy/gzip)
+ $(call if_changed,ld/objcopy/gzip/...)
When the rule is evaluated, it is checked to see if any files
need an update, or the command line has changed since the last
@@ -1110,7 +1110,7 @@ When kbuild executes, the following steps are followed (roughly):
significant; for instance, the below will fail (note the extra space
after the comma):
target: source(s) FORCE
- #WRONG!# $(call if_changed, ld/objcopy/gzip)
+ #WRONG!# $(call if_changed, ld/objcopy/gzip/...)
ld
Link target. Often, LDFLAGS_$@ is used to set specific options to ld.
@@ -1142,7 +1142,7 @@ When kbuild executes, the following steps are followed (roughly):
The ": %: %.o" part of the prerequisite is a shorthand that
free us from listing the setup.o and bootsect.o files.
- Note: It is a common mistake to forget the "target :=" assignment,
+ Note: It is a common mistake to forget the "targets :=" assignment,
resulting in the target file being recompiled for no
obvious reason.