2002-12-13  Dave Love  <fx@gnu.org>

	* config/alpha/alpha.h (CPP_CPU_SPEC): Add -D__ALPHA -D__Alpha_AXP.

	* config/alpha/osf.h (CPP_PREDEFINES): Add  -D__arch64__ -D__digital__.

===================================================================
RCS file: osf.h,v
retrieving revision 1.1
diff -u -r1.1 osf.h
--- osf.h	2002/12/13 18:32:44	1.1
+++ osf.h	2003/02/27 14:45:05
@@ -32,9 +32,27 @@
 
 /* Names to predefine in the preprocessor for this target machine.  */
 
+/* With `Compaq C V6.4-215 (dtk) on Compaq Tru64 UNIX V5.1A (Rev. 1885)'
+   I see the following in the output of `cc -E -v -std -' where -std is
+   `relaxed ANSI':
+
+These macros are in effect at the start of the compilation.
+----- ------ --- -- ------ -- --- ----- -- --- ------------
+
+ -D__DECC -D__osf__ -D__arch64__ -D__PRAGMA_ENVIRONMENT -D_LONGLONG -D__digital__ -D__X_FLOAT -D__DATE__="Dec 13 2002"  -D__STDC_VERSION__=199901L  -D__DECC_MODE_RELAXED -D__DECC_VER=60490215  -D_SYSTYPE_BSD -D__ALPHA -D__IEEE_FLOAT -D__unix__ -D__STDC_HOSTED__ -D__TIME__="18:58:48"  -D__Alpha_AXP -D__INITIAL_POINTER_SIZE=0  -D__STDC__=0  -D__LANGUAGE_C__ -D__alpha
+
+  See osf5.h concerning __X_FLOAT.  I don't know what __IEEE_FLOAT
+  means (maybe not VAX?) and whether or not it should be defined.
+  __PRAGMA_ENVIRONMENT is Compaq C-specific, dealing with the 32-bit
+  pointer environment.  __arch64__ is used in some headers; I don't
+  know whether or not it should go in CPP_CPU_SPEC.
+
+  -- fx@gnu.org
+*/
 #define CPP_PREDEFINES "\
 -Dunix -D__osf__ -D_LONGLONG -DSYSTYPE_BSD \
--D_SYSTYPE_BSD -Asystem=unix -Asystem=xpg4"
+-D_SYSTYPE_BSD -D__arch64__ -D__digital__ \
+-Asystem=unix -Asystem=xpg4"
 
 /* Tru64 UNIX V5 requires additional definitions for 16 byte long double
    support.  Empty by default.  */
===================================================================
RCS file: alpha.h,v
retrieving revision 1.1
diff -u -r1.1 alpha.h
--- alpha.h	2002/12/13 18:32:10	1.1
+++ alpha.h	2002/12/13 19:14:03
@@ -332,9 +332,11 @@
 # endif
 #endif /* CPP_CPU_DEFAULT_SPEC */
 
+/* Compaq C defines __IEEE_FLOAT with unknown semantics.  See also osf.h.  */
 #ifndef CPP_CPU_SPEC
 #define CPP_CPU_SPEC "\
-%{!undef:-Acpu=alpha -Amachine=alpha -D__alpha -D__alpha__ \
+%{!undef:-Acpu=alpha -Amachine=alpha -D__alpha -D__alpha__ -D__ALPHA \
+-D__Alpha_AXP \
 %{mcpu=ev4|mcpu=21064:%(cpp_cpu_ev4) }\
 %{mcpu=ev5|mcpu=21164:%(cpp_cpu_ev5) }\
 %{mcpu=ev56|mcpu=21164a:%(cpp_cpu_ev56) }\