tcc-mes gets stuck building meslibc in amd64 bootstrap

[vladoshub]

Steps for reproduction
sudo ./rootfs.py -c -a amd64 --update-checksums
Environment
ubuntu 20.04 VM Virtual Box

build gets stuck on command:
tcc-mes -c -D HAVE_CONFIG_H=1 -I include -I include/linux/x86_64 -o /usr/lib/mes/crt1.o lib/linux/x86_64-mes-gcc/crt1.c

I've been waiting for over 2 hours and nothing happens

[Googulator]

Known issue, the currently used TCC versions only support x86 properly. Support for AMD64 and other architectures is a post-1.0 goal.

Leaving this open to track this issue.

[stikonas]

Yes, that's a bug in mescc. It was actually much worth until recently and mescc couldn't even build tcc-mes but riscv64 bringup seems to have fixed a lot of 32-bit vs 64-bit issues, so now it builds tcc-mes on amd64 but there are still some miscompilation bugs... Probably just one or two bugs left but it's not easy to debug...

[stikonas]

It does seem to work marginally better with latest mes/tinycc:

 +> tcc-mes -c -D HAVE_CONFIG_H=1 -I include -I include/linux/x86_64 -o /usr/lib/mes/crt1.o lib/linux/x86_64-mes-gcc/crt1.c 
 +> catm /usr/lib/mes/crtn.o 
 +> catm /usr/lib/mes/crti.o 
 +> if match amd64 x86 
 +> tcc-mes -c -D HAVE_CONFIG_H=1 -I include -I include/linux/x86_64 -o unified-libc.o unified-libc.c 
assert fail: ((ft & 0x000f /* mask for basic type */ ) == 0 /* integer type */ ) || ((ft & 0x000f /* mask for basic type */ ) == 12 /* 64 bit integer */ ) || ((ft & 0x000f /* mask for basic type */ ) == 4 /* pointer */ ) || ((ft & 0x000f /* mask for basic type */ ) == 5 /* enum definition */ ) || ((ft & 0x000f /* mask for basic type */ ) == 6 /* function type */ )

/usr/bin/tcc-mes abnormal termination, signal number = 11
core dumped