Simplify start_of_data, start_of_text and related code.

* src/mem-limits.h: Remove !emacs and _LIBC conditional code.
(start_of_data): Merge into start_of_data function.
* src/sysdep.c (start_of_text): Remove.  Move simplified versions of
it in the only users: src/unexaix.c and unexec.c.
(read_input_waiting): Remove local declaration of quit_char.
(start, etext): Remove declarations.
(start_of_data): Merge with the version in mem-limits.h and move
to vm-limits.c.
* src/vm-limit.c (start_of_data): Merged and simplified version of the
code formerly in mem-limits.h and sysdep.c.
* src/unexec.c (start): New declaration, moved from sysdep.c.
(start_of_text): Simplified version of the code formerly in sysdep.c.
* unexaix.c (start_of_text): Simplified version of the code
formerly in sysdep.c.
* src/m/alpha.h (HAVE_TEXT_START): Remove.
(TEXT_START): Move ...
* src/unexalpha.c (TEXT_START): ... here.
* src/s/hpux10-20.h (TEXT_START): Remove.
* src/s/darwin.h (TEXT_START):
* src/m/mips.h (TEXT_START):
* src/m/macppc.h (HAVE_TEXT_START):
* src/m/m68k.h (TEXT_START):
* src/m/iris4d.h (TEXT_START):
* src/m/intel386.h (TEXT_START):
* src/m/ibmrs6000.h (TEXT_START):
* src/m/ia64.h (HAVE_TEXT_START):
* src/s/msdos.h (TEXT_START): Likewise.

3 files changed, 0 insertions, 5 deletions

diff --git a/src/s/darwin.h b/src/s/darwin.h
index cd1f9384833..146bfd693a2 100644
--- a/src/s/darwin.h
+++ b/src/s/darwin.h
@@ -117,9 +117,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
 #define HAVE_SOCKETS
 
-/* start_of_text isn't actually used, so make it compile without error.  */
-#define TEXT_START (0)
-
 /* Definitions for how to compile & link.  */
 #ifdef HAVE_NS
 #define SYSTEM_PURESIZE_EXTRA 200000
diff --git a/src/s/hpux10-20.h b/src/s/hpux10-20.h
index 8d9c73e2368..dd0e1bea9ad 100644
--- a/src/s/hpux10-20.h
+++ b/src/s/hpux10-20.h
@@ -131,7 +131,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define DATA_SEG_BITS 0x40000000
 
 #define DATA_START    0x40000000
-#define TEXT_START    0x00000000
 
 /* Data type of load average, as read out of kmem.  */
 #define LOAD_AVE_TYPE double
diff --git a/src/s/msdos.h b/src/s/msdos.h
index cffa13cef41..78a38c86059 100644
--- a/src/s/msdos.h
+++ b/src/s/msdos.h
@@ -75,7 +75,6 @@ You lose; /* Emacs for DOS must be compiled with DJGPP */
 #define _longjmp longjmp
 
 #define DATA_START  (&etext + 1)
-#define TEXT_START  &start
 
 #define _NAIVE_DOS_REGS