Hi Frank,

Frank Mölendörp wrote:
I'm trying to compile uClinux at MPS (Microcontroller Prototyping System). Here I have a customized Cortex M4 processor on it, this means that the peripherals could customized loaded into a FPGA.
Used files:
uCLinux-dist (20200315)

Do you mean version 20100315 ?


CodeSourcery G++ 4.4.1
and a patch directly from ARM.

I currently could compile the Kernel and the uClibc, but after entering the userland, I come into trouble. The limits.h from the compiler has a special directive called # include_next <limits.h>. So I looked for the next limits.h file in all the directorys.
Here is the output:

------------------8<---------------------8<-----------------------8<---------

make[1]: Entering directory `/mnt/drive/uClinux-dist/user'
make -j1 /mnt/drive/uClinux-dist/prop /mnt/drive/uClinux-dist/vendors/MPS/CM3/. busybox dhcpcd-new games gdbserver inetd init login net-tools ping ramimage sash telnetd || exit $?
make[2]: Entering directory `/mnt/drive/uClinux-dist/user'
[ ! -d "/mnt/drive/uClinux-dist/prop" ] || ( touch /mnt/drive/uClinux-dist/prop/.sgbuilt_user && make -j1 -C /mnt/drive/uClinux-dist/prop ) || exit $? make[2]: Nothing to be done for `/mnt/drive/uClinux-dist/vendors/MPS/CM3/.'. [ ! -d "busybox" ] || ( touch busybox/.sgbuilt_user && make -j1 -C busybox ) || exit $?
make[3]: Entering directory `/mnt/drive/uClinux-dist/user/busybox'
make[4]: `__build' is up to date.
 CC      applets/applets.o
In file included from include/libbb.h:41,
                from include/busybox.h:10,
                from applets/applets.c:11:
/home/quotrader/CodeSourcery/Sourcery_G++_Lite/arm-none-linux-gnueabi/libc/usr/include/limits.h:23: warning: #warning LIBC_LIMITS_H_CS In file included from /home/quotrader/CodeSourcery/Sourcery_G++_Lite/arm-none-linux-gnueabi/libc/usr/include/limits.h:125,
                from include/libbb.h:41,
                from include/busybox.h:10,
                from applets/applets.c:11:
/mnt/drive/uClinux-dist/uClibc/include/limits.h:22: warning: #warning LIBC_LIMITS_uC /mnt/drive/uClinux-dist/uClibc/include/limits.h:124: fatal error: limits.h: No such file or directory
compilation terminated.
make[4]: *** [applets/applets.o] Error 1
make[3]: *** [applets] Error 2
make[3]: Leaving directory `/mnt/drive/uClinux-dist/user/busybox'
make[2]: *** [busybox] Error 2
make[2]: Leaving directory `/mnt/drive/uClinux-dist/user'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/mnt/drive/uClinux-dist/user'
make: *** [subdirs] Error 1

------------------8<---------------------8<-----------------------8<---------


/mnt/drive/uClinux-dist/uClibc/include/limits.h:124: fatal error: limits.h: No such file or directory ^- this message says me, that he couldn't find the next limits.h. In all the limits.h's I found there was this directive:
# include_next <limits.h>

I don't understand this mechanism. So could some please tell me: How does it work and when somebody knows how I fix this problem.

It simply goes on to include the next limits.h file in its
include search path.

I seem to recall this coming up a few years ago (don't recall if it
was and ARM targeted compiler or not though) - on this list. If you
google a little you may find the answer back then.

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     g...@snapgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
8 Gardner Close                             FAX:         +61 7 3217 5323
Milton, QLD, 4064, Australia                WEB: http://www.SnapGear.com
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