Commit 6012121865d53e1da793cb7f2a50d7bef5b0a3a6

Paul Eggert 2003-08-17T00:09:27

(AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Limit stack size to 1MB, so as not to render systems with no stack size limit (e.g., linux-2.2.x) unusable. Suggestion and code from Bruno Haible. Include <unistd.h>. On some systems, it is required for the definition of _SC_PAGESIZE.