Build failure

[CpuID]

Hi there,

Has anyone come across this so far...?

root@dev1:/tmp/work_dir/freeswitch/src/mod/endpoints/mod_wsbridge# make
  CC       mod_wsbridge_la-mod_wsbridge.lo
mod_wsbridge.c: In function 'wsbridge_callback_ws':
mod_wsbridge.c:682:5: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
     strncpy(bugfree_message + 1, dtmf_json_unformatted, size);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mod_wsbridge.c:677:12: note: length computed here
     size = strlen(dtmf_json_unformatted);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mod_wsbridge.c:422:3: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
   strncpy(bugfree_message + 1, message, size);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mod_wsbridge.c:419:10: note: length computed here
   size = strlen(message);
          ^~~~~~~~~~~~~~~
In function 'wsbridge_strncpy_null_term.part.7',
    inlined from 'wsbridge_strncpy_null_term' at mod_wsbridge.c:1702:13,
    inlined from 'channel_outgoing_channel' at mod_wsbridge.c:1469:4:
mod_wsbridge.c:1707:2: error: 'strncpy' specified bound 50 equals destination size [-Werror=stringop-truncation]
  strncpy(dst, src, len);
  ^~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [Makefile:717: mod_wsbridge_la-mod_wsbridge.lo] Error 1

Some system details below:

root@dev1:/tmp/work_dir/freeswitch/src/mod/endpoints/mod_wsbridge# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --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-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-6) 

root@dev1:/tmp/work_dir/freeswitch/src/mod/endpoints/mod_wsbridge# cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Possibly some minor C tweaks required...? Or adjust some CFLAGS...?

[CpuID]

Also, when I tried doing the build using the normal make module helpers, it claimed Unknown target mod_wsbridge which is weird... which is why I tried make from within the module directory itself above.

root@dev1:/tmp/work_dir/freeswitch# make mod_wsbridge-install
make[1]: Entering directory '/tmp/work_dir/freeswitch'
 /bin/mkdir -p '/usr/local/freeswitch/lib'
 /bin/bash /tmp/work_dir/freeswitch/libtool   --mode=install /usr/bin/install -c   libfreeswitch.la '/usr/local/freeswitch/lib'
libtool: install: /usr/bin/install -c .libs/libfreeswitch.so.1.0.0 /usr/local/freeswitch/lib/libfreeswitch.so.1.0.0
libtool: install: (cd /usr/local/freeswitch/lib && { ln -s -f libfreeswitch.so.1.0.0 libfreeswitch.so.1 || { rm -f libfreeswitch.so.1 && ln -s libfreeswitch.so.1.0.0 libfreeswitch.so.1; }; })
libtool: install: (cd /usr/local/freeswitch/lib && { ln -s -f libfreeswitch.so.1.0.0 libfreeswitch.so || { rm -f libfreeswitch.so && ln -s libfreeswitch.so.1.0.0 libfreeswitch.so; }; })
libtool: install: /usr/bin/install -c .libs/libfreeswitch.lai /usr/local/freeswitch/lib/libfreeswitch.la
libtool: install: /usr/bin/install -c .libs/libfreeswitch.a /usr/local/freeswitch/lib/libfreeswitch.a
libtool: install: chmod 644 /usr/local/freeswitch/lib/libfreeswitch.a
libtool: install: ranlib /usr/local/freeswitch/lib/libfreeswitch.a
libtool: finish: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/sbin" ldconfig -n /usr/local/freeswitch/lib
----------------------------------------------------------------------
Libraries have been installed in:
   /usr/local/freeswitch/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the '-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the 'LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the 'LD_RUN_PATH' environment variable
     during linking
   - use the '-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to '/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
make[1]: Leaving directory '/tmp/work_dir/freeswitch'
make[1]: Entering directory '/tmp/work_dir/freeswitch/src/mod'
make[2]: Entering directory '/tmp/work_dir/freeswitch/src/mod'
Unknown target mod_wsbridge-install
make[2]: *** [Makefile:744: mod_wsbridge-install-all] Error 1
make[2]: Leaving directory '/tmp/work_dir/freeswitch/src/mod'
make[1]: *** [Makefile:744: mod_wsbridge-install] Error 2
make[1]: Leaving directory '/tmp/work_dir/freeswitch/src/mod'
make: *** [Makefile:4355: mod_wsbridge-install] Error 2
root@dev1:/tmp/work_dir/freeswitch# make mod_wsbridge         
make[1]: Entering directory '/tmp/work_dir/freeswitch'
make  libfreeswitch.la
make[2]: Entering directory '/tmp/work_dir/freeswitch'
make[2]: Leaving directory '/tmp/work_dir/freeswitch'
make[1]: Leaving directory '/tmp/work_dir/freeswitch'
make[1]: Entering directory '/tmp/work_dir/freeswitch/src/mod'
make[2]: Entering directory '/tmp/work_dir/freeswitch/src/mod'
Unknown target mod_wsbridge
make[2]: *** [Makefile:744: mod_wsbridge-all] Error 1
make[2]: Leaving directory '/tmp/work_dir/freeswitch/src/mod'
make[1]: *** [Makefile:744: mod_wsbridge] Error 2
make[1]: Leaving directory '/tmp/work_dir/freeswitch/src/mod'
make: *** [Makefile:4355: mod_wsbridge] Error 2

[dragos-oancea]

The C compiler on Debian Buster does not like strncpy. You need to replace the statement with snprintf. It builds just fine on older Debian 9.

[CpuID]

Thx will give it a try. If it works I'll drop a patch somewhere for others.

[svh-pad]

I have tried replacing strncpy with snprintf but get a very similar error. What seemed to work for me is disable the stringop-truncation check. So I ran

CFLAGS="-g -O2 -Wno-stringop-truncation" MOD_CFLAGS="-g -O2 -Wno-stringop-truncation"  ./configure

instead of just ./configure

[we-do-ai-admin]

@svh-pad

I have tried replacing strncpy with snprintf but get a very similar error. What seemed to work for me is disable the stringop-truncation check. So I ran

CFLAGS="-g -O2 -Wno-stringop-truncation" MOD_CFLAGS="-g -O2 -Wno-stringop-truncation"  ./configure

instead of just ./configure

where did you make the replacement?

[svh-pad]

@we-do-ai-admin

where did you make the replacement?

It's been a while so I don't remember the details, sorry. To be honest as I'm looking at it now I wonder if it was the wsbridge module or if I ran into the error somewhere else (I remember having had difficulty compiling FreeTDM). What I did was look up the line numbers for which I saw the error and for each of those lines replace strncpy by the (what seemed to me) appropriate snprintf statement. As I mentioned I solved my issue by just turning off the warnings, I didn't feel confident I'd be able to fix the implementation.