Gilles Chanteperdrix wrote:
> Hans Søndergaard (HSO) wrote:
> > Hi,
> >
> > Thanks for the answer.
> > We are now trying to install Xenomai 2.4.3 using Linux 2.6.24 on
> AT91SAM9260,
> > but have a problem:
> >
> > Is it possible to disable the building of the posix skin when
> > configuring the user space libraries for Xenomai?
> >
> > I have tried --disable-posix-skin, but this had no effect.
> >
> > The reason why I ask is that the building of src/skins/posix/init.c
> > fails like this:
> >
> > [EMAIL PROTECTED] posix]$ arm-linux-uclibc-gcc -DHAVE_CONFIG_H -I.
> -I../../../src/inc
> > lude -I../../../../xenomai-2.4.3/src/skins/posix -O2 -D_GNU_SOURCE
> -D_REENTRANT
> > -Wall -pipe -march=armv5 -D__XENO__ -D__IN_XENO__ -Wstrict-prototypes
> -I../../..
> > /../xenomai-2.4.3/include -I../../../../xenomai-2.4.3/include/posix -MT
> libpthre
> > ad_rt_la-init.lo -MD -MP -MF .deps/libpthread_rt_la-init.Tpo -c
> ../../../../xeno
> > mai-2.4.3/src/skins/posix/init.c -fPIC -DPIC -o
> .libs/libpthread_rt_la-init.o
> > In file included from ../../../src/include/asm/xenomai/atomic.h:78,
> > from
> ../../../../xenomai-2.4.3/include/nucleus/system.h:27,
> > from ../../../src/include/asm/xenomai/system.h:135,
> > from ../../../../xenomai-2.4.3/include/nucleus/types.h:40,
> > from ../../../../xenomai-2.4.3/include/nucleus/queue.h:25,
> > from
> ../../../../xenomai-2.4.3/include/nucleus/timebase.h:30,
> > from ../../../../xenomai-2.4.3/include/nucleus/timer.h:27,
> > from
> ../../../../xenomai-2.4.3/include/nucleus/thread.h:26,
> > from
> ../../../../xenomai-2.4.3/include/posix/pthread.h:150,
> > from
> /home/stk/brick/mb9200/buildroot/build_arm/staging_dir/bin
> >
> -ccache/../lib/gcc/arm-linux-uclibc/4.1.1/../../../../arm-linux-uclibc/sys-inclu
> > de/bits/uClibc_mutex.h:16,
> > from
> /home/stk/brick/mb9200/buildroot/build_arm/staging_dir/bin
> >
> -ccache/../lib/gcc/arm-linux-uclibc/4.1.1/../../../../arm-linux-uclibc/sys-inclu
> > de/bits/uClibc_stdio.h:120,
> > from
> /home/stk/brick/mb9200/buildroot/build_arm/staging_dir/bin
> >
> -ccache/../lib/gcc/arm-linux-uclibc/4.1.1/../../../../arm-linux-uclibc/sys-inclu
> > de/stdio.h:73,
> > from ../../../../xenomai-2.4.3/src/skins/posix/init.c:20:
> > ../../../src/include/asm/xenomai/syscall.h: In function
> 'xeno_arm_features_check
> > ':
> > ../../../src/include/asm/xenomai/syscall.h:295: error: 'stderr' undeclared
> (firs
> > t use in this function)
> > ../../../src/include/asm/xenomai/syscall.h:295: error: (Each undeclared
> identifi
> > er is reported only once
> > ../../../src/include/asm/xenomai/syscall.h:295: error: for each function
> it appe
> > ars in.)
> >
> > Obviously there is something wrong with the include path used:
> > uClibc_mutex.h should not include 'pthread.h' in the Xenomai
> > distribution but rather the version in uClibc itself.
> >
> > Why this happens I'm trying to discover.
> >
> > The complete configure I'm using is:
> >
> > ../xenomai-2.4.3/configure --build=i686-pc-linux-gnu
> --host=arm-linux-uclibc --enable-arm-mach=at91sam926x --enable-arm-tsc
> >
> > Thanks in advance.
>
> Well, I understand that it may not be important to you if you do not
> intend to use the posix skin, but we should try and solve this issue
> (which seems to be a uclibc issue). Including posix skin pthread.h
> instead of libc pthread.h should be no problem, since posix skin
> pthread.h include the libc pthread.h. The problem here is due to the
> fact that asm-arm/syscall.h is trying to use stderr whereas we are at
> the very beginning of stdio.h where stderr is not defined yet.
>
> I have to admit that I have no idea here other than defining a function
> in init.c which calls fprintf and to call this function instead of
> fprintf in asm-arm/syscall.h
>
> Philippe, any better idea ?
>
No, but I do have an almost as ugly one to suggest:
--- include/asm-arm/syscall.h (revision 3729)
+++ include/asm-arm/syscall.h (working copy)
@@ -222,7 +222,6 @@
#define XENOMAI_SYSARCH_TSCINFO 4
#ifndef __KERNEL__
-#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -230,6 +229,8 @@
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
+#include <error.h>
+#include <errno.h>
__attribute__((weak)) struct __xn_tscinfo __xn_tscinfo = {
type: -1
@@ -291,17 +292,15 @@
err = XENOMAI_SYSCALL2(__xn_sys_arch,
XENOMAI_SYSARCH_TSCINFO, &__xn_tscinfo);
if (err) {
- error:
- fprintf(stderr, "Xenomai: Your board/configuration does not"
- " allow tsc emulation in user-space: %d\n", err);
- exit(EXIT_FAILURE);
+ fail:
+ error(EXIT_FAILURE, err,
+ "Xenomai: Your board/configuration does not"
+ " allow tsc emulation in user-space\n");
}
fd = open("/dev/mem", O_RDONLY | O_SYNC);
- if (fd == -1) {
- perror("Xenomai init: open(/dev/mem)");
- exit(EXIT_FAILURE);
- }
+ if (fd == -1)
+ error(EXIT_FAILURE, errno, "Xenomai init: open(/dev/mem)");
page_size = sysconf(_SC_PAGESIZE);
@@ -313,10 +312,8 @@
phys_addr = (unsigned long) __xn_tscinfo.u.fr.counter;
addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
fd, phys_addr & ~(page_size - 1));
- if (addr == MAP_FAILED) {
- perror("Xenomai init: mmap(/dev/mem)");
- exit(EXIT_FAILURE);
- }
+ if (addr == MAP_FAILED)
+ error(EXIT_FAILURE, errno, "Xenomai init:
mmap(/dev/mem)");
__xn_tscinfo.u.fr.counter =
((volatile unsigned *)
@@ -330,10 +327,8 @@
phys_addr = (unsigned long) __xn_tscinfo.u.dec.counter;
addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
fd, phys_addr & ~(page_size - 1));
- if (addr == MAP_FAILED) {
- perror("Xenomai init: mmap(/dev/mem)");
- exit(EXIT_FAILURE);
- }
+ if (addr == MAP_FAILED)
+ error(EXIT_FAILURE, "Xenomai init: mmap(/dev/mem)");
__xn_tscinfo.u.dec.counter =
((volatile unsigned *)
@@ -342,18 +337,15 @@
}
#endif /* CONFIG_XENO_ARM_HW_DIRECT_TSC == __XN_TSC_TYPE_DECREMENTER */
case __XN_TSC_TYPE_NONE:
- goto error;
+ goto fail;
default:
- fprintf(stderr,
- "Xenomai: kernel/user tsc emulation mismatch.\n");
- exit(EXIT_FAILURE);
+ error(EXIT_FAILURE, err,
+ "Xenomai: kernel/user tsc emulation mismatch.\n");
}
- if (close(fd)) {
- perror("Xenomai init: close(/dev/mem)");
- exit(EXIT_FAILURE);
- }
+ if (close(fd))
+ error(EXIT_FAILURE, errno, "Xenomai init: close(/dev/mem)");
#endif /* CONFIG_XENO_ARM_HW_DIRECT_TSC */
}
#define xeno_arch_features_check() xeno_arm_features_check()
--
Philippe.
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