Re: armv5b-softfloat with gcc-3.4.3 and glibc-2.3.3

[Vinay K Nallamothu <vinay dot nallamothu at gsecone dot com>]

Hi Dan,

I tried your program, but gave the following compile with Mazur's
headers. 

===================================================================
[nvinay@vpntest nvinay]$ armv5b-softfloat-linux-gcc x.c
x.c: In function `main':
x.c:7: error: `PAGE_SIZE' undeclared (first use in this function)
x.c:7: error: (Each undeclared identifier is reported only once
x.c:7: error: for each function it appears in.)
===================================================================

I managed to compile it after including <asm/page.h> and gave the
following output:
PAGE_SIZE = 4096
sysconf(_SC_PAGE_SIZE) = 4096

It does compile fine with my native gcc (i386) without including
<asm/page.h>

Thanks
Vinay

On Mon, 2005-03-28 at 05:01 -0800, Dan Kegel wrote:
> Vinay K Nallamothu wrote:
> > Just wanted to share my experience building a big endian toolchain for
> > IXP425 with crosstool-0.28-rc37.
> >
> > I used armv5b-softfloat-linux with the following configuration.
> > ==================gcc-3.4.3-glibc-2.3.3.dat=========================
> > BINUTILS_DIR=binutils-2.15.94.0.2.2
> > GCC_DIR=gcc-3.4.3
> > GLIBC_DIR=glibc-2.3.3
> > LINUX_DIR=linux-2.6.8
> > GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.3
> > ====================================================================
> >
> > Although the glibc built works well for applications on 2.6 arm kernels,
> > I faced various issues on system with 2.4 kernels such zombie process,
> > module loading problems.
> >
> > Apparently, this was due to some system calls removed during 2.6
> > especially related to module loading.
> >
> > To overcome this problem, after some googling, instead of using the
> > plain kernel-2.6.8 headers, I have replaced the kernel "include" folder
> > with Mariusz Mazur's linux-libc-headers-2.6.8.1 ...
> > and re-compiled. I have been using this toolchain compiling, 2.4 kernels
> > and userland for about 3 weeks and have found no issues so far.
> >
> > From my experience, it seems better to use linux-libc-headers than using
> > headers from kernel sources.
> 
> Thanks for the info!
> I'd like to check one thing about how glibc and Mazur's sanitized
> headers interact.  Can you compile the following program and
> tell me what it prints on a system whose glibc was compiled
> as you describe?
> 
> #include <stdio.h>
> #include <sys/user.h>
> #include <unistd.h>
> 
> int main(int argc, char **argv)
> {
>          printf("PAGE_SIZE = %d\n", PAGE_SIZE);
>          printf("sysconf(_SC_PAGE_SIZE) = %d\n", sysconf(_SC_PAGE_SIZE));
> }
> 
> Thanks,
> Dan
> 
> --
> Trying to get a job as a c++ developer?  See http://kegel.com/academy/getting-hired.html
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