avidemux build fails with "invalid conversion from ‘const char**’ to ‘char**’", others

[deesto (John S. De Stefano Jr.)]

Building latest version fails with these among other errors:

...
/opt/local/var/macports/build/_opt_local_var_macports_sources_www.macports.org_files_ports_multimedia_avidemux/avidemux/work/avidemux_2.5.3/cmake_compile_check/iconv_check.cpp:12: error: invalid conversion from ‘const char**’ to ‘char**’
/opt/local/var/macports/build/_opt_local_var_macports_sources_www.macports.org_files_ports_multimedia_avidemux/avidemux/work/avidemux_2.5.3/cmake_compile_check/iconv_check.cpp:12: error:   initializing argument 2 of ‘size_t libiconv(void*, char**, size_t*, char**, size_t*)’
gmake[1]: *** [CMakeFiles/cmTryCompileExec.dir/iconv_check.cpp.o] Error 1
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_www.macports.org_files_ports_multimedia_avidemux/avidemux/work/build/CMakeFiles/CMakeTmp'
gmake: *** [cmTryCompileExec/fast] Error 2
...
make[2]: *** [avidemux/ADM_outputs/oplug_avi/CMakeFiles/oplug_avi_cli.dir/op_avisavecopy_pack.cpp.o] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_www.macports.org_files_ports_multimedia_avidemux/avidemux/work/build'
make[1]: *** [avidemux/ADM_outputs/oplug_avi/CMakeFiles/oplug_avi_cli.dir/all] Error 2
...

Please see the attached log, and let me know if this is an error on my part?

[deesto (John S. De Stefano Jr.)]

port install debug log

[ryandesign (Ryan Schmidt)]

Duplicate of #30525.