Error compiling box64 0.2.8 with GCC 13.3.0 within Buildroot
Target : AArch64 generic , RPI5ARM64, others...

Box64 0.2.6 compiles just fine in the same environment.
Box64 0.2.8 errors on custommem.c :

Building C object CMakeFiles/box64.dir/src/custommem.c.o
{standard input}: Assembler messages:
{standard input}:7113: Error: symbol `mmap64' is already defined
make[3]: *** [CMakeFiles/box64.dir/build.make:439: CMakeFiles/box64.dir/src/custommem.c.o] Error 1

Any idea ?