update to 5.003_97b/hint/irix_6_2.sh

It is possible with the 7.1 compilers for IRIX-6.2 and later to
change the default compiler options for the system.  You need to
explicitely select the compiler options in the hints file to avoid
mix-n-match ABI problems.  I also added some additional commentary...
Patch against 5.003_97b follows:

p5p-msgid: yd8hghdjbk0.fsf@hoshi.engr.sgi.com

diff --git a/hints/irix_6_2.sh b/hints/irix_6_2.sh
index 44ea859..4f49a8e 100644 (file)
--- a/hints/irix_6_2.sh
+++ b/hints/irix_6_2.sh
@@ -6,14 +6,16 @@
 #      Andy Dougherty <doughera@lafcol.lafayette.edu>
 #      with help from Dean Roehrich <roehrich@cray.com>.
 #   cc -n32 update info from Krishna Sethuraman, krishna@sgi.com.
+#       additional update from Scott Henry, scotth@sgi.com
 
 # Use   sh Configure -Dcc='cc -n32' to try compiling with -n32.
 
 case "$cc" in
 *"cc -n32"*)
        ld=ld
-       ccflags="$ccflags -D_BSD_TYPES -D_BSD_TIME -woff 1009,1110,1184 -OPT:fprop_limit=1500"
-       optimize='none'  # Miniperl core dumps with -O
+       ccflags="$ccflags -D_BSD_TYPES -D_BSD_TIME -woff 1009,1110,1184 -OPT:Olimit=0"
+#      optimize='none' # for pre-7.1 compilers. Miniperl core dumps with -O
+       optimize='-O3'  # This works with the 7.1 and later compilers
        ldflags=' -L/usr/local/lib -L/usr/lib32 -L/lib32'
        cccdlflags=' '
        lddlflags="-n32 -shared"
@@ -23,7 +25,9 @@ case "$cc" in
        nm_so_opt='-p'
        ;;
 *)
-       ccflags="$ccflags -D_BSD_TYPES -D_BSD_TIME -Olimit 3000"
+       # this is needed to force the old-32 paths
+       #  since the system default can be changed.
+       ccflags="$ccflags -32 -D_BSD_TYPES -D_BSD_TIME -Olimit 3000"
        ;;
 esac
 
@@ -48,6 +52,12 @@ libswanted="$*"
 # tests would pass some times and fail at other times.
 # The safest thing to do seems to be to eliminate them.
 #
+#  Actually, the only libs that you want are '-lm'.  Everything else
+# you need is in libc.  You do also need '-lbsd' if you choose not
+# to use the -D_BSD_* defines.  Note that as of 6.2 the only
+# difference between '-lmalloc' and '-lc' malloc is the debugging
+# and control calls. -- scotth@sgi.com
+
 set `echo X "$libswanted "|sed -e 's/ sun / /' -e 's/ crypt / /' -e 's/ bsd / /' -e 's/ PW / /'`
 shift
 libswanted="$*"