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>

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.