Hi,
most distributions use separate kernel output directories to be
able to build several kernels from the same source tree.
Building the multiproto tree in such an environment fails either
as .config is not found or some kernel source files are not found
(i. e. compiler.h).
The attached patch therefore introduces SDIR which points to the
kernel sources and passes it as an additional argument to some
scripts which need to access .config or source files for example.
The patch is still incomplete i. e. not all references to kernel
source or output directories have been adapted and tested. But
the patch is sufficient for successfully running make and make
distclean in such an environment.
Would some developers with deeper knowledge about the kernel
build system comment whether my patch is going in the right
direction and how to solve other references (e. g. the lxdialog
stuff)?
Bye.
--
Dipl.-Inform. (FH) Reinhard Nissl
mailto:rnissl@xxxxxx
diff --git a/v4l/Makefile b/v4l/Makefile
--- a/v4l/Makefile
+++ b/v4l/Makefile
@@ -16,11 +16,14 @@ else
ifneq ($(SRCDIR),)
KDIR := $(SRCDIR)
+SDIR := $(SRCDIR)
else
ifneq ($(KERNELRELEASE),)
KDIR := /lib/modules/$(KERNELRELEASE)/build
+SDIR := /lib/modules/$(KERNELRELEASE)/source
else
KDIR := /lib/modules/$(shell uname -r|perl -ne 'if (/^([0-9]*)\.([0-9])*\.([0-9]*)(.*)$$/) { printf ("%s.%s.%s%s\n",$$1,$$2,$$3,$$4); };')/build
+SDIR := /lib/modules/$(shell uname -r|perl -ne 'if (/^([0-9]*)\.([0-9])*\.([0-9]*)(.*)$$/) { printf ("%s.%s.%s%s\n",$$1,$$2,$$3,$$4); };')/source
endif
endif
@@ -239,7 +242,7 @@ oss:
ln -sf . oss
config-compat.h:: $(obj)/.version .myconfig
- perl scripts/make_config_compat.pl $(KDIR) $(obj)/.myconfig $(obj)/config-compat.h
+ perl scripts/make_config_compat.pl $(KDIR) $(SDIR) $(obj)/.myconfig $(obj)/config-compat.h
kernel-links makelinks::
cd ..; v4l/scripts/makelinks.sh $(KDIR)
@@ -309,10 +312,10 @@ endif
$(obj)/.config: $(obj)/.version
@echo Updating/Creating .config
@if [ -e $(obj)/.config ]; then touch $(obj)/.config ; else \
- ./scripts/make_kconfig.pl $(KDIR) ; fi
+ ./scripts/make_kconfig.pl $(KDIR) $(SDIR) ; fi
$(obj)/Kconfig: $(obj)/.version
- ./scripts/make_kconfig.pl $(KDIR)
+ ./scripts/make_kconfig.pl $(KDIR) $(SDIR)
# With make -j, it's possible that both the .config and Kconfig rules
# will run at the same time, running make_kconfig.pl twice. There
@@ -332,7 +335,7 @@ menuconfig:: $(MCONF) lxdialog $(obj)/Kc
$(MCONF) $(obj)/Kconfig
allyesconfig allmodconfig:: $(obj)/.version
- ./scripts/make_kconfig.pl $(KDIR) 1
+ ./scripts/make_kconfig.pl $(KDIR) $(SDIR) 1
# rule to build kernel conf programs
KMAKEVARS := config-targets=1 mixed-targets=0 dot-config=0
diff --git a/v4l/scripts/make_config_compat.pl b/v4l/scripts/make_config_compat.pl
--- a/v4l/scripts/make_config_compat.pl
+++ b/v4l/scripts/make_config_compat.pl
@@ -1,7 +1,8 @@
#!/usr/bin/perl
use strict;
-my $kdir=shift or die "should specify a kernel dir";
+my $kdir=shift or die "should specify a kernel output dir";
+my $sdir=shift or die "should specify a kernel source dir";
my $infile=shift or die "should specify an input config file";
my $outfile=shift or die "should specify an output config file";
@@ -9,7 +10,7 @@ my $out;
sub check_spin_lock()
{
- my $file = "$kdir/include/linux/netdevice.h";
+ my $file = "$sdir/include/linux/netdevice.h";
my $old_syntax = 1;
open INNET, "<$file" or die "File not found: $file";
diff --git a/v4l/scripts/make_kconfig.pl b/v4l/scripts/make_kconfig.pl
--- a/v4l/scripts/make_kconfig.pl
+++ b/v4l/scripts/make_kconfig.pl
@@ -13,7 +13,8 @@ my %depmods = ();
my %depmods = ();
my ($version, $level, $sublevel, $kernver);
-my $kernel = shift;
+my $kdir = shift;
+my $sdir = shift;
my $force_kconfig = shift;
my $debug=0;
@@ -480,7 +481,7 @@ print "Preparing to compile for kernel v
print "Preparing to compile for kernel version $kernver\n";
# Get Kernel's config settings
-%kernopts = process_config("$kernel/.config");
+%kernopts = process_config("$kdir/.config");
# Modules must be on, or building out of tree drivers makes no sense
if(!$kernopts{MODULES}) {
@@ -542,7 +543,7 @@ disable_config('VIDEO_HELPER_CHIPS_AUTO'
disable_config('VIDEO_HELPER_CHIPS_AUTO');
# ACI needs some kernel includes that might not be there
-disable_config('SOUND_ACI_MIXER') if (! -e "$kernel/sound/oss/sound_config.h");
+disable_config('SOUND_ACI_MIXER') if (! -e "$sdir/sound/oss/sound_config.h");
# Check dependencies
my %newconfig = checkdeps();
@@ -595,7 +596,7 @@ if ($force_kconfig==1 || !-e '.config')
# Check for full kernel sources and print a warning
sub kernelcheck()
{
- my $fullkernel="$kernel/fs/fcntl.c";
+ my $fullkernel="$sdir/fs/fcntl.c";
if (! -e $fullkernel) {
print <<"EOF2";
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