From: Nobuyoshi Nakada <nobu@...>
Date: 2008-04-02T10:13:59+09:00
Subject: Re: [PATCH] fix build with -j

Hi,

At Tue, 1 Apr 2008 23:36:47 +0900,
Paul Brannan wrote in [ruby-core:16102]:
> Currently, if I try to build ruby from scratch with make -j, I get:
> 
> ...
> distcc gcc -g -O2   -I. -I.ext/include/i686-linux -I./include -I.  -DRUBY_EXPORT -D_GNU_SOURCE=1   -o strlcat.o -c ./missing/strlcat.c
> distcc gcc -g -O2   -I. -I.ext/include/i686-linux -I./include -I.  -DRUBY_EXPORT -D_GNU_SOURCE=1   -o dmyext.o -c dmyext.c
> ./miniruby -I./lib  ./enc/make_encdb.rb ./enc encdb.h
> make: ./miniruby: Command not found
> make: *** [encdb.h] Error 127
> make: *** Waiting for unfinished jobs....

It works for me, with GNU make 3.81.

> -encs: enc.mk
> +encs: enc.mk $(PREP)
>  	$(MINIRUBY) -run -e mkdir -- -p "$(EXTOUT)/$(arch)/enc/trans" enc/trans
>  	$(MAKE) -f enc.mk $(MFLAGS)
>  
>  enc.mk: $(srcdir)/enc/make_encmake.rb $(srcdir)/enc/Makefile.in $(srcdir)/enc/depend \
> -	$(srcdir)/lib/mkmf.rb $(RBCONFIG)
> +	$(srcdir)/lib/mkmf.rb $(RBCONFIG) $(PREP)
>  	$(MINIRUBY) $(srcdir)/enc/make_encmake.rb --builtin-encs="$(BUILTIN_ENCOBJS)" $@

$(RBCONFIG) already depends on $(PREP).

> -encdb.h:
> +encdb.h: $(PREP)
>  	$(MINIRUBY) $(srcdir)/enc/make_encdb.rb $(srcdir)/enc $@

encdb.h and transdb.h don't depend on $(PREP) to get rid of
recompiling encoding.c and transcode.c always.  encdb and
transdb are used as dependencies instead.

-- 
Nobu Nakada