autoconf now looks for lib3dfxgl.so to figure out whether or not to build

the -glide targets (now named -3dfx..)  Thid doesn't mean that I have
actually written the makefile stuff for these targets, but rather that I
have written the foundation needed to create them.

TODO

@@ -1 +1,2 @@
 Global: sed 's/\<sprintf *(\([^,]\+\),/sprintf(\1, sizeof(\1)),/g' to fix possible buffer overruns
+configure.in: clean up the intel -mcpu stuff

client.in

@@ -2,9 +2,9 @@ ifneq ($(HAS_OGL),)
 GLQUAKE   =$(BIN_PREFIX)-gl
 endif
 
-# XXX add glide
-ifneq ($(HAS_GLIDE),)
-GLIDEQUAKE= $(BIN_PREFIX)-glide
+# FIX:  Add 3dfxgl targets
+ifneq ($(HAS_TDFXGL),)
+TDFXQUAKE= $(BIN_PREFIX)-3dfx
 endif
 
 ifneq ($(HAS_X11),)

configure.in

@@ -187,6 +187,27 @@ AC_SUBST(HAS_GLIDE)
 AC_SUBST(GLIDE_CFLAGS)
 AC_SUBST(GLIDE_LDFLAGS)
 
+TDFXGL_LDFLAGS=""
+AC_ARG_ENABLE(3dfxgl,
+[  --enable-3dfxgl=DIR  Use lib3dfxgl.so found in DIR],
+HAS_TDFXGL=$withval, HAS_TDFXGL=auto
+)
+if test "x$HAS_3DFXGL" != xno; then
+   if test "x$HAS_3DFXGL" != xauto; then
+      TDFXGL_LDFLAGS="-L$withval"
+   fi
+   dnl FIX: is it safe to assume test has -o ?
+   if test "x$HAS_GLIDE" != x; then
+      if test "x$HAS_OGL" != x; then
+         if test "x$HAS_VGA" != x; then
+	    AC_CHECK_LIB(3dfxgl, glColor4f, HAS_TDFXGL=yes, HAS_TDFXGL=)
+	 fi
+      fi
+   fi
+fi
+AC_SUBST(HAS_TDFXGL)
+AC_SUBST(TDFXGL_LDFLAGS)
+
 dnl Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
 AC_CHECK_FUNC(stricmp,