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.

1 files changed, 0 insertions, 33 deletions

diff --git a/src/mem-limits.h b/src/mem-limits.h
index 490a61227ae..a550e1464b8 100644
--- a/src/mem-limits.h
+++ b/src/mem-limits.h
@@ -25,17 +25,6 @@ extern int etext;
 /* Some systems need this before <sys/resource.h>.  */
 #include <sys/types.h>
 
-#ifdef _LIBC
-
-#include <sys/resource.h>
-#define BSD4_2                  /* Tell code below to use getrlimit.  */
-
-/* Old Linux startup code won't define __data_start.  */
-extern int etext, __data_start; weak_extern (__data_start)
-#define start_of_data() (&__data_start ?: &etext)
-
-#else /* not _LIBC */
-
 #ifdef HAVE_SYS_RESOURCE_H
 # include <sys/time.h>
 # include <sys/resource.h>
@@ -54,7 +43,6 @@ extern int etext, __data_start; weak_extern (__data_start)
 #include <sys/resource.h>
 #endif /* BSD4_2 */
 
-#ifdef emacs
 /* The important properties of this type are that 1) it's a pointer, and
    2) arithmetic on it should work as if the size of the object pointed
    to has a size of 1.  */
@@ -77,26 +65,5 @@ extern POINTER start_of_data (void);
 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
 #endif
 
-#ifdef DATA_START
-#define start_of_data() ((char *)DATA_START)
-#endif
-
-#ifdef BSD_SYSTEM
-#ifndef DATA_SEG_BITS
-#ifndef DATA_START
-extern char etext;
-#define start_of_data() &etext
-#endif
-#endif
-#endif
-
-#else  /* not emacs */
-extern char etext;
-#define start_of_data() &etext
-#endif /* not emacs */
-
-#endif /* not _LIBC */
-
-
 /* arch-tag: fe39244e-e54f-4208-b7aa-02556f7841c5
    (do not change this comment) */