Re: alsa makefiles don't work with -jN where N > 1

[Takashi Iwai <tiwai@suse.de>]

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At Tue, 24 Aug 2004 15:44:40 -0400,
Lee Revell wrote:
> 
> Subject says it all.  Here is the relevant section from the GNU make documentation:
> 
> `warning: jobserver unavailable: using -j1. Add `+' to parent make rule.'
>         In order for make processes to communicate, the parent will pass
>         information to the child. Since this could result in problems if
>         the child process isn't actually a make, the parent will only do
>         this if it thinks the child is a make. The parent uses the
>         normal algorithms to determine this (see section 5.6.1 How the
>         MAKEVariable Works). If the makefile is constructed such that
>         the parent doesn't know the child is a make process, then the
>         child will receive only part of the information necessary. In
>         this case, the child will generate this warning message and
>         proceed with its build in a sequential manner.
> 
> I believe this is because some of the rules in the makefile aren't make
> commands, but rm -f's.  This always seemed dangerous and sloppy to me -
> why does make need to rm -f anything?  Isn't this the whole point of
> makefiles, so you don't have to rm -f your tree and rebuild every time
> you change something? 

The attached oneliner should fix this.


Takashi

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Index: alsa-driver/Makefile
===================================================================
RCS file: /suse/tiwai/cvs/alsa/alsa-driver/Makefile,v
retrieving revision 1.73
diff -u -r1.73 Makefile
--- alsa-driver/Makefile	3 Jun 2004 17:04:36 -0000	1.73
+++ alsa-driver/Makefile	25 Aug 2004 13:56:14 -0000
@@ -98,7 +98,7 @@
 all-deps: toplevel.config.in acinclude.m4 include/config1.h.in
 
 include/sndversions.h:
-	make dep
+	$(MAKE) dep
 
 .PHONY: compile
 compile: include/sound/version.h include/sndversions.h