undefined reference to `RTco_select'

[Saifi Khan]

Hi:

Trying to compile basic module in GNU Modula-2 and the following lines are 
spewed by the linker

/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/12/m2/m2pim/libm2pim.so: undefined 
reference to `RTco_select'
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/12/m2/m2pim/libm2pim.so: undefined 
reference to `RTco_initSemaphore'
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/12/m2/m2pim/libm2pim.so: undefined 
reference to `RTco_wait'
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/12/m2/m2pim/libm2pim.so: undefined 
reference to `RTco_signal'
collect2: error: ld returned 1 exit status

$ gm2 --version
gm2 (Debian 12.2.0-9) 12.2.0
Copyright (C) 2022 Free Software Foundation, Inc.

Here are the operating environment specific details

$ cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux bookworm/sid"
NAME="Debian GNU/Linux"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/";
SUPPORT_URL="https://www.debian.org/support";
BUG_REPORT_URL="https://bugs.debian.org/";

$ uname -a
Linux ankara 6.0.0-5-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.0.10-1 (2022-11-26) 
x86_64 GNU/Linux

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/12/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12.2.0-9' 
--with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs 
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr 
--with-gcc-major-version-only --program-suffix=-12 
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id 
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix 
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug 
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new 
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin 
--enable-default-pie --with-system-zlib --enable-libphobos-checking=release 
--with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch 
--disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic 
--enable-offload-targets=nvptx-none=/build/gcc-12-lH3g9c/gcc-12-12.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-12-lH3g9c/gcc-12-12.2.0/debian/tmp-gcn/usr
 --enable-offload-defaulted --without-cuda-driver --enable-checking=release 
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.0 (Debian 12.2.0-9) 

As noted in an earlier thread
https://lists.gnu.org/archive/html/gm2/2021-04/msg00007.html

i've ensured that modules, procedures and type identifiers are in upper case.

Any pointers how to resolve this ?


warm regards
Saifi.