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| author | Peter Korsgaard <jacmet@sunsite.dk> | 2010-05-06 20:46:49 +0200 |
|---|---|---|
| committer | Peter Korsgaard <jacmet@sunsite.dk> | 2010-05-06 20:56:18 +0200 |
| commit | 4efdd9f3d949576392d0f0a7ed06e41b125916c5 (patch) | |
| tree | 4060da4f25bac7965b997efd39126ad8254e686b | |
| parent | d701a82321ad2f3e5bfa16639e93532294cad4ce (diff) | |
| download | buildroot-novena-4efdd9f3d949576392d0f0a7ed06e41b125916c5.tar.gz buildroot-novena-4efdd9f3d949576392d0f0a7ed06e41b125916c5.zip | |
Makefile.package.in: optimize UPPERCASE macro
As noticed by Thomas, we call the UPPERCASE macro a lot, and it slows down
startup quite a bit.
Optimize it by implementing it in make, rather than forking a shell + tr.
The implementation is heavily based on the 'up' macro from gmsl
(http://gmsl.sf.net)
With this in place, startup time is ~5 times lower.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
| -rw-r--r-- | package/Makefile.package.in | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/package/Makefile.package.in b/package/Makefile.package.in index e98fda85d..c2f86c7be 100644 --- a/package/Makefile.package.in +++ b/package/Makefile.package.in @@ -24,7 +24,21 @@ # UPPERCASE Macro -- transform its argument to uppercase and replace dots and # hyphens to underscores -UPPERCASE = $(shell echo $(1) | tr "a-z.-" "A-Z__") + +# Heavily inspired by the up macro from gmsl (http://gmsl.sf.net) +# This is approx 5 times faster than forking a shell and tr, and +# as this macro is used a lot it matters +# This works by creating translation character pairs (E.G. a:A b:B) +# and then looping though all of them running $(subst from,to,text) +[FROM] := a b c d e f g h i j k l m n o p q r s t u v w x y z . - +[TO] := A B C D E F G H I J K L M N O P Q R S T U V W X Y Z _ _ + +UPPERCASE = $(strip $(eval __tmp := $1) \ + $(foreach c, $(join $(addsuffix :,$([FROM])),$([TO])), \ + $(eval __tmp := \ + $(subst $(word 1,$(subst :, ,$c)),$(word 2,$(subst :, ,$c)),\ + $(__tmp)))) \ + $(__tmp)) # Define extrators for different archive suffixes INFLATE.bz2 = $(BZCAT) |