[kbuild-devel] string and if
Hi, I'm currently trying to port a program which used CML1 to lkc/kconfig. Now I need a string variable which is dependend on a bool. Shouldn't this: config GNU_TARGET string i386-linux if OPT_I386 string i486-linux if OPT_I486 string i686-linux if OPT_I686 string arm-linux if OPT_ARM4 default -not configured- for example give GNU_TARGET=arm-linux in case OPT_ARM4=y? It doesn't work, I get -not configured-, no matter which option is defined. This is basically lkc-1.2, taken from Roman's web site. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Braunschweiger Str. 79, 31134 Hildesheim, Germany Handelsregister: Amtsgericht Hildesheim, HRA 2686 Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 Visit us at the SPS/IPC/Drives 2002 in Nuernberg! Hall 5, Booth 154 +++ Please contact us for details. --- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en ___ kbuild-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/kbuild-devel
Re: [kbuild-devel] A hole in kernel space!
Note: this question really belongs on [EMAIL PROTECTED].
[Pannaga Bhushan]
I am looking for a setup where I need to have a certain amount
of data always available to the kernel. The size of data I am looking
at is abt 40MB(preferably, but I will settle for 20MB too) . So the
normal kmalloc will not help me. So what I did was, I created a hole
in kernel space by putting the following line in vmlinux.lds
ALIGN(4096);
__hole_start = .;
. = . + 0xmy_size;
__hole_end = .;
I assume you also tried the old-fashioned C method:
#include asm/page.h
static char __hole_start[0xmy_size] __attribute__((__aligned__(PAGE_SIZE)));
Did that not work either?
1. Is there any other way I can get to keep 40MB(or even 20MB) of
contiguous kernel memory space ?
There used to be a patch out there called `bigphysarea' - look around,
perhaps someone is still maintaining it. It should do what you want.
2.Abt the 17MB hole, I am able to use after the _end = .;
is this 17MB really there in kernel image?('cos it isn't in
any segment and also it appears after _end).
I doubt it is accessible, but that is really uninformed speculation on
my part.
(basically, i want by data in kernel space always available to kernel
without having to bother abt swapping the pages back)
User space could allocate this space and then call mlockall(). That
does not guarantee *physically* contiguous space, though, and is only
accessible within to the address space of that one process.
Peter
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Re: [kbuild-devel] string and if
Robert Schwebel wrote: config GNU_TARGET string i386-linux if OPT_I386 string i486-linux if OPT_I486 string i686-linux if OPT_I686 string arm-linux if OPT_ARM4 default -not configured- for example give GNU_TARGET=arm-linux in case OPT_ARM4=y? It doesn't work, I get -not configured-, no matter which option is defined. Above isn't valid. You define multiple user prompts and at most only one is allowed. If you want a derived variable, it should look like this: config GNU_TARGET string default i386-linux if OPT_I386 default i486-linux if OPT_I486 default i686-linux if OPT_I686 default arm-linux if OPT_ARM4 default -not configured- bye, Roman --- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en ___ kbuild-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/kbuild-devel
[kbuild-devel] Re: [PATCH] [kbuild] Possibility to sanely link against off-directory .so
On Wed, Nov 06, 2002 at 07:52:30PM +0100, Petr Baudis wrote: Hello, this patch (against 2.5.46) introduces two special variables which make it actually possible to have .so as the only product of build in some directory and to link something against .so being built in another directory. The variable host-cshlib-extra makes it possible to explicitly mention shared objects to be built and the variable $(foo-linkobjs) allows user to specify additional objects to link foo against, while not creating any dependencies of foo on the objects. The changes are minimal while dramatically extending possibilities for messing with the shared objects and they should have no unwanted side-effects, and it appears to actually work for me. Please apply. There is only one user of shared libaries today, thats Kconfig. And Kconfig is the only user of C++ as well. There is quite a lot of added complexity in Makefile.lib + Makefile.build only to support this. Being the one that introduced it, I would like to see it go away again. Rationale behind this is that the current added complexity has an penalty when compiling a kernel, and I would like to move the complexity to the only user. Care to try that approach? Sam --- This sf.net email is sponsored by: See the NEW Palm Tungsten T handheld. Power Color in a compact size! http://ads.sourceforge.net/cgi-bin/redirect.pl?palm0001en ___ kbuild-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/kbuild-devel
