@mirabilos @bentsukun revisiting DELL UNIX gcc:
since I don't have a way to make it define NSIG (gcc -traditional-cpp stalls when in including mbsdint.h tests), I have to add it in CFLAGS manually.
and getting not-defining kshjmp_buf error when using "CC=gcc -DNSIG=32 -Dssize_t=int"
build-dellunix-gcc.log updated.