Merge remote-tracking branch 'origin/compile-telnet-arm' into integration_2024_w45 (!3096)

telnetsrv uses the Intel/AMD-specific "cpuid" instruction, which is not
available on ARM machines. Remove the call.

The previous code was checking for the number of cores, which is
retained by a call to get_nprocs(). I did not find an equivalent for the
number of threads in C. In C++, there would be
https://en.cppreference.com/w/cpp/thread/thread/hardware_concurrency, in
case it's relevant for anybody.

Also, add it to the cross-compilation pipeline

common/utils/telnetsrv/telnetsrv_proccmd.c

@@ -32,6 +32,7 @@
 #define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <sys/sysinfo.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
@@ -222,11 +223,8 @@ char aname[256];
     tdata->numlines = 0;
   }
 
-  unsigned int eax = 11, ebx = 0, ecx = 1, edx = 0;
-
-  asm volatile("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) : "0"(eax), "2"(ecx) :);
-
-  prnt("System has %d cores %d threads %d Actual threads", eax, ebx, edx);
+  int nprocs = get_nprocs();
+  prnt("System has %d cores", nprocs);
 
   prnt("\n  id          name            state   USRmod    KRNmod  prio nice   vsize   proc pol \n\n");
   snprintf(aname, sizeof(aname), "/proc/%d/stat", getpid());

docker/Dockerfile.build.ubuntu22.cross-arm64

@@ -43,12 +43,12 @@ RUN /bin/sh oaienv && \
     cd ../build-cross/ && \
     # install missing libyaml-cpp-dev for arm64
     apt install -y libyaml-cpp-dev:arm64 && \
-    cmake ../../.. -GNinja \
+    cmake ../../.. -GNinja -DENABLE_TELNETSRV=ON \
       -DCMAKE_TOOLCHAIN_FILE=../../../cmake_targets/cross-arm.cmake -DNATIVE_DIR=../build \
       -DCMAKE_C_FLAGS="-Werror" -DCMAKE_CXX_FLAGS="-Werror" && \
     echo "====== Start of log for cross-build executables ======" && \
     # making always passing so we can analyze the all.txt file
-    ninja dlsim ulsim ldpctest polartest smallblocktest nr_pbchsim nr_dlschsim nr_ulschsim nr_dlsim nr_ulsim nr_pucchsim nr_prachsim lte-softmodem nr-softmodem nr-cuup oairu lte-uesoftmodem nr-uesoftmodem params_libconfig coding rfsimulator > ../../log/all.txt 2>&1; \
+    ninja dlsim ulsim ldpctest polartest smallblocktest nr_pbchsim nr_dlschsim nr_ulschsim nr_dlsim nr_ulsim nr_pucchsim nr_prachsim lte-softmodem nr-softmodem nr-cuup oairu lte-uesoftmodem nr-uesoftmodem params_libconfig coding rfsimulator telnetsrv > ../../log/all.txt 2>&1; \
     # displaying errors and warnings
     grep -E -A3 "warning:|error:" ../../log/all.txt || true && \
     # will fail only if string "errors:" is found