From: Paolo 'Blaisorblade' Giarrusso Whitespace is significant for make, and I just fought against this... so please apply this patch. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Cc: Sam Ravnborg Signed-off-by: Andrew Morton --- 25-akpm/Documentation/kbuild/makefiles.txt | 6 ++++++ 1 files changed, 6 insertions(+) diff -puN Documentation/kbuild/makefiles.txt~doc-describe-kbuild-pitfall Documentation/kbuild/makefiles.txt --- 25/Documentation/kbuild/makefiles.txt~doc-describe-kbuild-pitfall Wed Mar 30 13:20:59 2005 +++ 25-akpm/Documentation/kbuild/makefiles.txt Wed Mar 30 13:20:59 2005 @@ -872,7 +872,13 @@ When kbuild executes the following steps Assignments to $(targets) are without $(obj)/ prefix. if_changed may be used in conjunction with custom commands as defined in 6.7 "Custom kbuild commands". + Note: It is a typical mistake to forget the FORCE prerequisite. + Another pitfall that bit me once is that whitespace is sometimes + significant; for instance, the below will fail (note the extra space + after the comma): + target: source(s) FORCE + $(call if_changed, ld/objcopy/gzip) ld Link target. Often LDFLAGS_$@ is used to set specific options to ld. _