/* This appears on 3.0, presumably as part of what SunSoft call X2. */
#undef NO_X_DESTROY_DATABASE
+#ifdef __GNUC__ /* Currently we use -lcposix only with gcc */
+#define POSIX_SIGNALS
+
+/* We don't need the definition from usg5-3.h with POSIX_SIGNALS. */
+#undef sigsetmask
+#undef HAVE_SYSV_SIGPAUSE
+#endif
+
/* People say that using -traditional causes lossage with `const',
so we might as well try getting rid of -traditional. */
#undef C_SWITCH_SYSTEM
has no libX11_s, and that linking with libc_s causes sbrk not to work. */
#undef LIB_X11_LIB
#undef LIBX11_SYSTEM
-#define LIBX11_SYSTEM -lpt -lnls -lnsl_s -lc
+#define LIBX11_SYSTEM -lpt -lnls -lnsl_s
/* TIOCGWINSZ isn't broken; you just have to know where to find it. */
#undef BROKEN_TIOCGWINSZ
#define NEED_SIOCTL
-/* This does no harm, and is necessary for some ANSI compilers. */
-#define C_SWITCH_SYSTEM -D_SYSV3
+/* We need either _XOPEN_SOURCE or _POSIX_SOURCE to import the posix
+ signal symbols; might as well use _XOPEN_SOURCE. Defining _SYSV3
+ ensures that we don't lose the traditional symbols as a side effect
+ from this or __STDC__ being defined. It can't hurt to Define
+ _XOPEN_SOURCE=500, the latest and greatest value as of this writing. */
+#define C_SWITCH_SYSTEM -D_XOPEN_SOURCE=500 -D_SYSV3
+#ifdef __GNUC__ /* Currently we use -lcposix only with gcc */
/* This works around a bug in ISC 4.0 and 3.0; it fails
to clear the "POSIX process" flag on an exec.
It won't be needed for 4.1. */
-/* neg@brooktrout.com reported that he did not have this function
- on ISC 3.0.1. I don't know who to believe or what to do,
- so I am leaving it alone until someone tells me
- precisely when this function is needed -- rms. */
#define EXTRA_INITIALIZE __setostype (0)
+#endif