Improve dual-universe comments in hints/sunos_4_1.sh

On Tue, 12 Aug 1997, Tim Bunce wrote:

> Here's the 5.004_03 trial 1 patch.

5.004_03 trial 1 included the following update to hints/sunos_4_1.sh:

p5p-msgid: Pine.SUN.3.96.970812170358.14488E-100000@newton.phys

1 files changed, 20 insertions, 1 deletions

diff --git a/hints/sunos_4_1.sh b/hints/sunos_4_1.sh
index a040d366f5..5e4429e84d 100644
--- a/hints/sunos_4_1.sh
+++ b/hints/sunos_4_1.sh
@@ -41,12 +41,31 @@ EOM
 # the problem.  Other BSD platforms may have similar problems.
 POSIX_cflags='ccflags="$ccflags -DSTRUCT_TM_HASZONE"'
 
+# The correct setting of groupstype depends on which version of the C
+# library is used.  If you are in the 'System V environment'
+# (i.e. you have /usr/5bin ahead of /usr/bin in your PATH), and
+# you use Sun's cc compiler, then you'll pick up /usr/5bin/cc, which
+# links against the C library in /usr/5lib.  This library has
+# groupstype='gid_t'.
+# If you are in the normal BSDish environment, then you'll pick up
+# /usr/ucb/cc, which links against the C library in /usr/lib.  That
+# library has groupstype='int'.
+#
+# If you are using gcc, it links against the C library in /usr/lib
+# independent of whether or not you are in the 'System V environment'.
+# If you want to use the System V libraries, then you need to 
+# manually set groupstype='gid_t' and add explicit references to 
+# /usr/5lib when Configure prompts you for where to look for libraries.
+#
 # check if user is in a bsd or system 5 type environment
 if cat -b /dev/null 2>/dev/null
 then # bsd
       groupstype='int'
 else # sys5
-      groupstype='gid_t'
+    case "$cc" in
+	*gcc*) groupstype='int';; # gcc doesn't do anything special
+	*) groupstype='gid_t';; # /usr/5bin/cc pulls in /usr/5lib/ stuff.
+    esac
 fi
 
 # If you get the message "unresolved symbol '__lib_version' " while