+2012-07-13 Glenn Morris <rgm@gnu.org>
+
+ * configure.ac (opsysfile): Set to empty on gnu, cygwin.
+
+ * configure.ac (BSD4_2, BSD_SYSTEM, USG, USG5, _AIX, CYGWIN)
+ (DARWIN_OS, GNU_LINUX, HPUX, IRIX6_5, SOLARIS2):
+ Move "system type" macros here from src/s.
+ (BSD_SYSTEM_AHB): New hack macro.
+ (AH_BOTTOM): Set BSD_SYSTEM, using BSD_SYSTEM_AHB.
+
+ * configure.ac (NSIG_MINIMUM, ULIMIT_BREAK_VALUE, SETUP_SLAVE_PTY)
+ (GC_MARK_SECONDARY_STACK): Move here from src/s.
+
2012-07-12 Glenn Morris <rgm@gnu.org>
+ * configure.ac (AH_BOTTOM) [DARWIN_OS]: Move SYSTEM_PURESIZE_EXTRA
+ setting here from src/s/darwin.h.
+
* configure.ac (NO_MATHERR): Unconditionally define for Darwin;
as src/s/darwin.h used to.