build with "make" command fails in Fedora 43 for branch Omega

Commands used:

git clone --branch Omega https://github.com/xbmc/xbmc.git

git clone --branch Omega https://github.com/xbmc/inputstream.ffmpegdirect.git

cd inputstream.ffmpegdirect && mkdir build && cd build
cmake -DADDONS_TO_BUILD=inputstream.ffmpegdirect -DADDON_SRC_PREFIX=../.. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../../xbmc/build/addons -DPACKAGE_ZIP=1 ../../xbmc/cmake/addons

make

make command returns at the end:

libtool: warning: remember to run 'libtool --finish /home/vnm_rzv/inputstream.ffmpegdirect/build/build/depends/lib'
libtool: compile: gcc -I. -I. -I../include -I./../include -I.. -I./.. -g -O2 -fvisibility=hidden -DLIBDIR="/home/vnm_rzv/inputstream.ffmpegdirect/build/build/depends/lib" -DBUILDING_LIBICONV -DBUILDING_LIBCHARSET -DBUILDING_DLL -DENABLE_RELOCATABLE=1 -DIN_LIBRARY -DINSTALLDIR="/home/vnm_rzv/inputstream.ffmpegdirect/build/build/depends/lib" -DNO_XMALLOC -Dset_relocation_prefix=libiconv_set_relocation_prefix -Drelocate=libiconv_relocate -Drelocate2=libiconv_relocate2 -DHAVE_CONFIG_H -c ./iconv.c -fPIC -DPIC -o iconv.o
In file included from ./loops.h:23,
from ./iconv.c:148:
./loop_wchar.h:39:17: error: conflicting types for 'mbrtowc'; have 'size_t(void)' {aka 'long unsigned int(void)'}
39 | extern size_t mbrtowc ();
| ^~~~~~~
In file included from ../include/iconv.h:118,
from ./iconv.c:20:
/usr/include/wchar.h:321:15: note: previous declaration of 'mbrtowc' with type 'size_t(wchar_t * restrict, const char * restrict, size_t, mbstate_t * restrict)' {aka 'long unsigned int(int * restrict, const char * restrict, long unsigned int, mbstate_t * restrict)'}
321 | extern size_t mbrtowc (wchar_t *__restrict __pwc,
| ^~~~~~~
./loop_wchar.h: In function 'wchar_to_loop_convert':
./loop_wchar.h:356:15: error: too many arguments to function 'mbrtowc'; expected 0, have 4
356 | res = mbrtowc(&wc,buf,bufcount,&state);
| ^~~~~~~ ~~~
./loop_wchar.h:39:17: note: declared here
39 | extern size_t mbrtowc ();
| ^~~~~~~
make[7]: *** [Makefile:87: iconv.lo] Error 1
make[6]: *** [Makefile:33: all] Error 2
make[5]: *** [CMakeFiles/iconv.dir/build.make:86: iconv-prefix/src/iconv-stamp/iconv-build] Error 2
make[4]: *** [CMakeFiles/Makefile2:87: CMakeFiles/iconv.dir/all] Error 2
make[3]: *** [Makefile:136: all] Error 2
make[2]: *** [CMakeFiles/iconv.dir/build.make:86: build/iconv/src/iconv-stamp/iconv-build] Error 2
make[1]: *** [CMakeFiles/Makefile2:411: CMakeFiles/iconv.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

Start with the CMake add-on build command and the libiconv failure in loop_wchar.h, reached while compiling iconv.c. Read the surrounding build files and reproduce the make command on Fedora 43; done means the inputstream.ffmpegdirect build completes without the mbrtowc errors.