Comment changes for some src/m/*.h files.

Remove some out-of-date comments, reformat others.

7 files changed, 12 insertions, 104 deletions

diff --git a/src/m/alpha.h b/src/m/alpha.h
index ec0ed92e24a..8f71b37a219 100644
--- a/src/m/alpha.h
+++ b/src/m/alpha.h
@@ -20,25 +20,12 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
-
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="note"
-
-NOTE-START
-Use -opsystem=osf1
-NOTE-END
-
-*/
-
 #ifndef _LP64
-#define _LP64                   /* This doesn't appear to be necessary
-                                   on OSF 4/5  -- fx.  */
+#define _LP64 /* This doesn't appear to be necessary on OSF 4/5  -- fx.  */
 #endif
 
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #undef WORDS_BIG_ENDIAN
 
 /* Now define a symbol for the cpu type, if your compiler
@@ -52,15 +39,12 @@ NOTE-END
    are always unsigned.
 
    This flag only matters if you use USE_LISP_UNION_TYPE.  */
-
 #define EXPLICIT_SIGN_EXTEND
 
 /* Data type of load average, as read out of kmem.  */
-
 #define LOAD_AVE_TYPE long
 
 /* Convert that into an integer that is 100 for a load average of 1.0  */
-
 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 
 /* GNU malloc and the relocating allocator do not work together
diff --git a/src/m/ibmrs6000.h b/src/m/ibmrs6000.h
index 8027afcc30e..cae666a43a0 100644
--- a/src/m/ibmrs6000.h
+++ b/src/m/ibmrs6000.h
@@ -1,6 +1,6 @@
 /* R2 AIX machine/system dependent defines
-   Copyright (C) 1988, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-                 2008, 2009, 2010  Free Software Foundation, Inc.
+   Copyright (C) 1988, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+                 2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -18,13 +18,6 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="aix3-1"  */
-
-/* Now define a symbol for the cpu type, if your compiler
-   does not define it automatically.  */
-
 /* The data segment in this machine always starts at address 0x20000000.
    An address of data cannot be stored correctly in a Lisp object;
    we always lose the high bits.  We must tell XPNTR to add them back.  */
diff --git a/src/m/ibms390.h b/src/m/ibms390.h
index efcd58daba3..9a8897e443d 100644
--- a/src/m/ibms390.h
+++ b/src/m/ibms390.h
@@ -18,13 +18,8 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="<name of system .h file here, without the s- or .h>"  */
-
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #define WORDS_BIG_ENDIAN
 
 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
@@ -32,15 +27,12 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
    are always unsigned.
 
    This flag only matters if you use USE_LISP_UNION_TYPE.  */
-
 #define EXPLICIT_SIGN_EXTEND
 
 /* Data type of load average, as read out of kmem.  */
-
 #define LOAD_AVE_TYPE long
 
 /* Convert that into an integer that is 100 for a load average of 1.0  */
-
 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 
 /* Define VIRT_ADDR_VARIES if the virtual addresses of
@@ -49,7 +41,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
    Otherwise Emacs assumes that text space precedes data space,
    numerically.  */
-
 #define VIRT_ADDR_VARIES
 
 /* arch-tag: d8a0ffa4-a8f0-4736-90d3-7fd7b21b8314
diff --git a/src/m/ibms390x.h b/src/m/ibms390x.h
index 18cd87f0b9a..4d83dc6e69a 100644
--- a/src/m/ibms390x.h
+++ b/src/m/ibms390x.h
@@ -21,23 +21,12 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
    into ibms390.h.  */
 
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="<name of system .h file here, without the s- or .h>"
-
-NOTE-START
-IBM s390 64 bits (-machine=ibms390x64)
-
-  The possibilities for -opsystem are: gnu-linux.
-
-NOTE-END */
-
+/* Used for machine IBM s390 64 bits with opsys gnu-linux.  */
 #define BITS_PER_LONG 64
 #define BITS_PER_EMACS_INT 64
 
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #define WORDS_BIG_ENDIAN
 
 /* Define the type to use.  */
@@ -49,15 +38,12 @@ NOTE-END */
    are always unsigned.
 
    This flag only matters if you use USE_LISP_UNION_TYPE.  */
-
 #undef EXPLICIT_SIGN_EXTEND
 
 /* Data type of load average, as read out of kmem.  */
-
 #define LOAD_AVE_TYPE long
 
 /* Convert that into an integer that is 100 for a load average of 1.0  */
-
 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 
 /* Define VIRT_ADDR_VARIES if the virtual addresses of
@@ -66,23 +52,19 @@ NOTE-END */
 
    Otherwise Emacs assumes that text space precedes data space,
    numerically.  */
-
 #define VIRT_ADDR_VARIES
 
 /* Define HAVE_ALLOCA to say that the system provides a properly
    working alloca function and it should be used.  Undefine it if an
    assembler-language alloca in the file alloca.s should be used. */
-
 #define HAVE_ALLOCA
 
 /* On the 64 bit architecture, we can use 60 bits for addresses */
-
 #define VALBITS         60
 
 #define LINKER $(CC) -nostdlib
 
 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
-
 #define XPNTR(a) XUINT (a)
 
 /* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
diff --git a/src/m/intel386.h b/src/m/intel386.h
index e2e22c3a538..3f9a49c4f46 100644
--- a/src/m/intel386.h
+++ b/src/m/intel386.h
@@ -1,6 +1,6 @@
 /* Machine description file for intel 386.
-   Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-                 2008, 2009, 2010  Free Software Foundation, Inc.
+   Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+                 2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -18,25 +18,8 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="note"
-
-NOTE-START
-Intel 386 (-machine=intel386)
-
-  The possibilities for -opsystem are: bsd4-2, usg5-2-2, usg5-3,
-  isc2-2, 386-ix, and linux.
-
-  18.58 should support a wide variety of operating systems.
-  Use linux for Linux.
-  It isn't clear what to do on an SCO system.
-
-NOTE-END */
-
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #undef WORDS_BIG_ENDIAN
 
 #ifdef USG
diff --git a/src/m/sparc.h b/src/m/sparc.h
index 23d334406bb..b949b56de32 100644
--- a/src/m/sparc.h
+++ b/src/m/sparc.h
@@ -1,6 +1,6 @@
 /* machine description file for Sun 4 SPARC.
-   Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-                 2008, 2009, 2010  Free Software Foundation, Inc.
+   Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+                 2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -17,47 +17,34 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="note"
-
-NOTE-START
-Use -opsystem=sunos4 for operating system version 4, and
--opsystem=bsd4-2 for earlier versions.
-NOTE-END  */
-
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #define WORDS_BIG_ENDIAN
 
 /* __sparc__ is defined by the compiler by default.  */
 
 /* XINT must explicitly sign-extend
    This flag only matters if you use USE_LISP_UNION_TYPE.  */
-
 #define EXPLICIT_SIGN_EXTEND
 
 /* Data type of load average, as read out of kmem.  */
-
 #define LOAD_AVE_TYPE long
 
 /* Convert that into an integer that is 100 for a load average of 1.0  */
-
 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
 
 /* Mask for address bits within a memory segment */
-
 #define SEGMENT_MASK (SEGSIZ - 1)
 
 #ifdef __arch64__               /* GCC, 64-bit ABI.  */
+
 #define BITS_PER_LONG 64
 
 #ifndef _LP64
-#define _LP64                   /* Done on Alpha -- not sure if it
-                                   should be here.  -- fx */
-#endif
+#define _LP64 /* Done on Alpha -- not sure if it should be here.  -- fx */
 #endif
 
+#endif  /* __arch64__ */
+
 /* arch-tag: 0a6f7882-33fd-4811-9832-7466c51e50f7
    (do not change this comment) */
diff --git a/src/m/vax.h b/src/m/vax.h
index f33c2d5227a..1670d2b5f48 100644
--- a/src/m/vax.h
+++ b/src/m/vax.h
@@ -18,18 +18,8 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
-/* The following line tells the configuration script what sort of
-   operating system this machine is likely to run.
-   USUAL-OPSYS="note"
-
-NOTE-START
-The vax (-machine=vax) runs zillions of different operating systems.
-
-NOTE-END  */
-
 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
    is the most significant byte.  */
-
 #undef WORDS_BIG_ENDIAN
 
 /* #define vax    -- appears to be done automatically  */
@@ -38,11 +28,9 @@ NOTE-END  */
    support the load average, so disable it for them.  */
 
 /* Data type of load average, as read out of kmem.  */
-
 #define LOAD_AVE_TYPE double
 
 /* Convert that into an integer that is 100 for a load average of 1.0  */
-
 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
 
 #define HAVE_FTIME