gcc -c -Wall -fsigned-char -Wno-unused-but-set-variable -pipe   -I/usr/local/src/gcl/o -I../h -I../gcl-tk new_init.c -o new_init.o
new_init.c: In function ‘NewInit’:
new_init.c:685: error: ‘ucontext_t’ undeclared (first use in this function)
new_init.c:685: error: (Each undeclared identifier is reported only once
new_init.c:685: error: for each function it appears in.)
new_init.c:685: error: expected ‘;’ before ‘v’
new_init.c:685: error: ‘v’ undeclared (first use in this function)
new_init.c:685: error: expected ‘;’ before ‘v’
At top level:
cc1: warning: unrecognized command line option "-Wno-unused-but-set-variable"
make[1]: *** [new_init.o] Error 1
make[1]: Leaving directory `/usr/local/src/gcl/o'
make: *** [unixport/saved_pre_gcl] Error 2
address@hidden:/usr/local/src/gcl#