trouble when linking with my toolchain

["Erlo Haugen" <elh at terma dot com>]

Hello everyone,
I managed to build a toolchain for LynxOS. It almost works:
I have build with C and Ada, the build did not come through when adding C++.

This is how I configured the compiler:
../gcc-4.0.3/configure --host=i686-pc-linux-gnu --target=$TARGET --prefix=$PREFIX --disable-nls --enable-languages=c,ada --enable-threads=posix --with-newlib --with-sysroot=/home/ubuntu/gccbuild/target_root/

target_root contains lib,usr and sys from the target (actually from the cygwin environment on my Windoze, but they
should be syncronized)


I have succesfully compiled and executed a C-program (not threaded) and an Ada-program (without tasks).


Next I made a little Ada program with two tasks, and ran my cross-gnatmake on it. the compilation went ok, but the linking
produced this:
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_mutexattr_init':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:174: undefined reference to `pthread_mutexattr_create'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_mutexattr_destroy':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:191: undefined reference to `pthread_mutexattr_delete'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_condattr_init':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:278: undefined reference to `pthread_condattr_create'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_condattr_destroy':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:295: undefined reference to `pthread_condattr_delete'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_setschedparam':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:415: undefined reference to `pthread_setscheduler'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__sched_yield':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:457: undefined reference to `pthread_yield'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-osinte.o): In function `system__os_interface__pthread_key_create':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-osinte.adb:585: undefined reference to `pthread_keycreate'
/opt/ppc/lib/gcc/ppc-elf-lynxos/4.0.3/adalib/libgnarl.a(s-taprop.o): In function `system__task_primitives__operations__create_task':
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-taprop.adb:944: undefined reference to `pthread_attr_create'
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-taprop.adb:944: undefined reference to `pthread_attr_create'
/home/ubuntu/gccbuild/build_gcc/gcc/ada/rts/s-taprop.adb:984: undefined reference to `pthread_attr_delete'


I tried to put the threaded versions of the C-libraries in 'sys-root'/lib, but that did not help.
What went wrong here? Was it when building the tools or when building the application?



Erlo Haugen
System Software Engineer,RD&E
Integrated Systems

Terma A/S
Vasekær 12
2730 Herlev
Denmark

T +45 8743 6000 
T +45 4594 9851 (direct)
F +45 8743 6001 
E elh@terma.com 
w www.terma.com 
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