../../exec/exec.c: In function `check_elf_phdr':
../../exec/exec.c:931: error: `PT_GNU_STACK' undeclared (first use in this function)
../../exec/exec.c:931: error: (Each undeclared identifier is reported only once
../../exec/exec.c:931: error: for each function it appears in.)
make[2]: *** [exec.o] Error 1
make[1]: *** [exec.prof_d] Error 2
make: *** [exec] Error 2