Re: [PATCH 4/9] build: include Tools.mk first in tools/Rules.mk

[Roger Pau Monne <roger.pau@citrix.com>]

Ian Campbell wrote:
> On Wed, 2012-07-11 at 11:23 +0100, Roger Pau Monne wrote:
>> Tools.mk should be included first, or PREFIX is not honoured in the
>> other conf/ files that define the paths of several tools.
> 
> Isn't it a bug for anything which is included/defined via
> $(XEN_ROOT)/Config.mk to depend on the contents of
> $(XEN_ROOT)/config/Tools.mk since for anything non-tools Tools.mk would
> never be included at all?

$(XEN_ROOT)/Config.mk includes config/{Linux.mk/NetBSD.mk} and
config/StdGNU.mk, which contain a bunch of paths, specially
config/StdGNU.mk. If the tools config file is not loaded before, all
this paths get set to the default value (which is probably fine in
Linux), but not desirable in NetBSD if the user has specified a custom
prefix.

So the main problem is that the tools Makefile should include
config/Tools.mk before config/StdGNU.mk, but since config/StdGNU.mk is
included in $(XEN_ROOT)/Config.mk we have to either include Tools.mk
before $(XEN_ROOT)/Config.mk or modify $(XEN_ROOT)/Config.mk to include
Tools.mk (which is not desirable at all). I don't care that
$(XEN_ROOT)/Config.mk uses the default paths when building the xen
kernel, but we should honour the user set paths when installing the tools.

One effect of this patch is that etc and var is installed inside of
$(PREFIX)/etc, which is normal in BSD systems, but I'm quite sure it is
not correct on Linux, so I should add the following chunk:

--- a/config/Linux.mk
+++ b/config/Linux.mk
@@ -6,3 +6,8 @@ KERNELS ?=
 XKERNELS := $(foreach kernel, $(KERNELS), \
               $(patsubst buildconfigs/mk.%,%, \
                 $(wildcard buildconfigs/mk.$(kernel))) )
+
+CONFIG_DIR = /etc
+XEN_LOCK_DIR = /var/lock
+XEN_RUN_DIR = /var/run/xen
+XEN_PAGING_DIR = /var/lib/xen/xenpaging

>> Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
>> ---
>>  tools/Rules.mk |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/tools/Rules.mk b/tools/Rules.mk
>> index 1e928b7..2dd8ed3 100644
>> --- a/tools/Rules.mk
>> +++ b/tools/Rules.mk
>> @@ -3,8 +3,8 @@
>>  # `all' is the default target
>>  all:
>>  
>> -include $(XEN_ROOT)/Config.mk
>>  -include $(XEN_ROOT)/config/Tools.mk
>> +include $(XEN_ROOT)/Config.mk
>>  
>>  export _INSTALL := $(INSTALL)
>>  INSTALL = $(XEN_ROOT)/tools/cross-install
> 
>