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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2014-08-08 17:23:08 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2014-08-19 10:02:41 +0200 |
| commit | ef80f0a1e033bcab17257e2155a3c9263a0919c1 (patch) | |
| tree | 8244447e827edb2adfcd8263e5c2425508fdf1a5 /Documentation/kbuild/makefiles.txt | |
| parent | b22ae40ef2e7847ddbd802d1a887188e113675f3 (diff) | |
| download | linux-ef80f0a1e033bcab17257e2155a3c9263a0919c1.tar.gz linux-ef80f0a1e033bcab17257e2155a3c9263a0919c1.tar.bz2 linux-ef80f0a1e033bcab17257e2155a3c9263a0919c1.zip | |
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.txt | 6 |
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. |