New hints for Digital UNIX

diff --git a/hints/dec_osf.sh b/hints/dec_osf.sh
index 0373135..6bde1b4 100644 (file)
--- a/hints/dec_osf.sh
+++ b/hints/dec_osf.sh
@@ -34,30 +34,57 @@
 #      hand searching things (index, m//, s///), seems to get slower.
 #      Your mileage will vary.
 #
+#      Note 5: The -std is needed because the following compiled
+#      without the -std and linked with -lm
+#
+#      #include <math.h>
+#      #include <stdio.h>
+#      int main(){short x=10,y=sqrt(x);printf("%d\n",y);}
+#
+#      will in Digital UNIX 3.* and 4.0b print 0 -- and in Digital
+#      UNIX 4.0{,a} dump core: Floating point exception in the printf(),
+#      the y has become a signaling NaN.
+#
 
-_DEC_cc_style=
-case "$optimize" in
-'')    case "$cc" in 
-       *gcc*)  
-               optimize='-O3'
-               ;;
-       *)      
-               # compile something small: taint.c is fine for this.
-               # the main point is the '-v' flag of 'cc'.
-               case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in
-               */gemc_cc*)
-                       # we have the new DEC GEM CC
-                       optimize='-O4'
+# If using the DEC compiler we must find out the DEC compiler style:
+# the style changed between Digital UNIX (aka DEC OSF/1) 3 and
+# Digital UNIX 4. The old compiler was originally from Ultrix and
+# the MIPS company, the new compiler is originally from the VAX world
+# and it is called GEM. Many of the options we are going to use depend
+# on the compiler style.
+
+# do NOT, I repeat, *NOT* take away that leading tab
+       _DEC_cc_style=
+# Configure Black Magic (TM)
+
+case "$cc" in
+*gcc*) ;; # pass
+*)     # compile something small: taint.c is fine for this.
+       # the main point is the '-v' flag of 'cc'.
+               case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in
+       */gemc_cc*)     # we have the new DEC GEM CC
                        _DEC_cc_style=new
                        ;;
-               *)
-                       # we have the old MIPS CC
-                       optimize='-O2 -Olimit 3200'
+       *)              # we have the old MIPS CC
                        _DEC_cc_style=old
                        ;;
-               esac
-               # cleanup
-               rm -f /tmp/taint$$.o
+       esac
+       # cleanup
+       rm -f /tmp/taint$$.o
+       ;;
+esac
+
+# we want optimisation
+
+case "$optimize" in
+'')    case "$cc" in 
+       *gcc*)  
+               optimize='-O3'                          ;;
+       *)      case "$_DEC_cc_style" in
+               new)    optimize='-O4'                  ;;
+               old)    optimize='-O2 -Olimit 3200'     ;;
+               esac
+               ;;
        esac
        ;;
 esac
@@ -69,10 +96,7 @@ ccflags="$ccflags -DSTANDARD_C"
 case "$cc" in
 gcc)   ccflags="$ccflags -ansi"
        ;;
-*)     ccflags="$ccflags -std1"
-       # -vaxc not to get warnings about stuff like$this for VMS.
-       # -vaxc is available only in newer DEC compilers.
-       test X"$_DEC_cc_style"Y = XnewY && ccflags="$ccflags -vaxc"
+*)     ccflags="$ccflags -std"
        ;;
 esac
 
@@ -105,13 +129,26 @@ case "$optimize" in
 esac
 
 #
+# Unset temporary variables no more needed.
+#
+
+unset _DEC_cc_style
+    
+#
 # History:
 #
+# perl5.003_27:
+#
+#      18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
+#
+#      * unset _DEC_cc_style and more commentary on -std.
+#
+#
 # perl5.003_26:
 #
 #      15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
 #
-#      * -std1 and -ansi.
+#      * -std and -ansi.
 #
 #
 # perl5.003_24: