* localtime.cc (localtime_r): Call tzset.

* Makefile.in: Make version.h/cygwin.din version check a warning since it is
not foolproof.
* cygheap.h (CYGHEAPSIZE): Bump size down.
* cygtls.h (_threadinfo::stacklock): New element.
(_threadinfo::pop): Make regparm.
(_threadinfo::lock): New function.
(_threadinfo::unlock): New function.
* cygtls.cc (_threadinfo::push): Wait for a lock on the stack before performing
the operation.
(_threadinfo::pop): Move to another file.
* cygwin.din: More SIGFE changes.
* exceptions.cc (try_to_debug): Always display messages on console.
(handle_exceptions): Unwind stack only when actually about to call sig_send.
(setup_handler): Lock stack prior to performing any operations.
* gendef (_sigfe): Ditto.
(_sigbe): Ditto.
(_threadinfo::pop): Ditto.  Move here.
* gen_tlsoffsets: Generate positive offsets.
* tlsoffsets.h: Regenerate.

winsup/cygwin/cygwin.din

@@ -479,19 +479,19 @@ fdimf NOSIGFE
 fdopen SIGFE
 _fdopen = fdopen SIGFE
 _fdopen64 = fdopen64 SIGFE
-feof NOSIGFE
-_feof = feof NOSIGFE
+feof SIGFE
+_feof = feof SIGFE
 ferror NOSIGFE
 _ferror = ferror NOSIGFE
-fflush NOSIGFE
-_fflush = fflush NOSIGFE
+fflush SIGFE
+_fflush = fflush SIGFE
 ffs NOSIGFE
 _ffs = ffs NOSIGFE
 fgetc SIGFE
 _fgetc = fgetc SIGFE
-fgetpos NOSIGFE
-_fgetpos = fgetpos NOSIGFE
-_fgetpos64 = fgetpos64 NOSIGFE
+fgetpos SIGFE
+_fgetpos = fgetpos SIGFE
+_fgetpos64 = fgetpos64 SIGFE
 fgets SIGFE
 _fgets = fgets SIGFE
 fileno NOSIGFE
@@ -503,7 +503,6 @@ _finitef = finitef NOSIGFE
 fiprintf SIGFE
 _fiprintf = fiprintf SIGFE
 flock SIGFE
-flock SIGFE
 floor NOSIGFE
 _floor = floor NOSIGFE
 floorf NOSIGFE
@@ -559,11 +558,11 @@ fstatfs SIGFE
 _fstatfs = fstatfs SIGFE
 fsync SIGFE
 _fsync = fsync SIGFE
-ftell NOSIGFE
-_ftell = ftell NOSIGFE
-ftello NOSIGFE
-_ftello = ftello NOSIGFE
-_ftello64 = ftello64 NOSIGFE
+ftell SIGFE
+_ftell = ftell SIGFE
+ftello SIGFE
+_ftello = ftello SIGFE
+_ftello64 = ftello64 SIGFE
 ftime SIGFE
 _ftime = ftime SIGFE
 ftok SIGFE