Re: [PATCH] out-of-tree builds

[Geert Uytterhoeven]

On Mon, 15 Mar 2004, Geert Uytterhoeven wrote:
> On Sun, 14 Mar 2004, Geert Uytterhoeven wrote:
> > Although I like the feature to build a kernel in a different directory a lot, I
> > don't like its syntax. I prefer to just have a build directory where I can run
> > `make whatever'.
> >
> > The following patch adds a configure script to the kernel. If you run
> >
> >     /path/to/kernel/source/tree/configure
> >
> > it will create a Makefile in the current directory, after which you can just do
> > `make whatever', just like in the source directory.
>
> Unfortunately not everything works.
>
> E.g. I need to build usr/ with a different (newer) binutils, so when the build
> fails on assembling usr/initramfs_data.o, I used to do the following, which no
> longer works:
>
> | tux$ PATH=/usr/bin/:$PATH make usr/
> | make: `usr/' is up to date.
> | tux$
>
> I guess I need a catch-all .PHONY rule, but don't know how to implement it...

`info make' never hurts...

--- linux-2.6.x/Makefile.in.orig	2004-02-08 10:50:36.000000000 +0100
+++ linux-2.6.x/Makefile.in	2004-03-22 23:02:29.000000000 +0100
@@ -0,0 +1,12 @@
+
+srcdir = @srcdir@
+
+dstdir = $(shell pwd)
+
+all:
+	@$(MAKE) -C $(srcdir) O=$(dstdir)
+
+%:	force
+	@$(MAKE) -C $(srcdir) O=$(dstdir) $@
+
+force:	;
--- linux-2.6.x/configure.orig	2004-02-08 10:50:36.000000000 +0100
+++ linux-2.6.x/configure	2004-03-15 10:27:00.000000000 +0100
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+srcdir=$(dirname $0)
+dstdir=$(pwd)
+
+if [ $srcdir = . -o $srcdir = $dstdir ]; then
+    echo Building in Linux kernel source tree, nothing changed
+else
+    if [ -e Makefile ]; then
+	/bin/mv Makefile Makefile.bak
+    fi
+    echo '# Generated automatically from Makefile.in by configure.' > Makefile
+    /bin/sed -e s+@srcdir@+$srcdir+ < $srcdir/Makefile.in >> Makefile
+    echo Linux kernel source tree in directory $srcdir
+    echo Building in directory $dstdir
+fi
+

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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