configure.in: Support shared libs on FreeBSD 3.x and 4.x

        * configure.in: Support shared libs on FreeBSD 3.x and 4.x
        * config/freebsd.ml: A copy of config/linux.ml since they are both
        ELF and both have a shared libm.

From-SVN: r25594

libstdc++/ChangeLog

+Fri Mar  5 02:16:39 1999  Doug Rabson  <dfr@freebsd.org>
+
+	* configure.in: Support shared libs on FreeBSD 3.x and 4.x
+	* config/freebsd.ml: A copy of config/linux.ml since they are both 
+	ELF and both have a shared libm.
+
 1999-02-24  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* configure.in: Fix INSTALLDIR sed pattern for Solaris sed.

libstdc++/config/freebsd.ml

+# Elf with shared libm, so we can link it into the shared libstdc++.
+
+LIBS    = $(ARLIB) $(SHLIB) $(SHLINK) mshlink
+SHFLAGS = -Wl,-soname,$(MSHLINK)
+SHDEPS  = -lm
+DEPLIBS = ../$(SHLIB)

libstdc++/configure.in

@@ -62,6 +62,8 @@ if [ "${shared}" = "yes" ]; then
     *-*-hpux*)		frags="${frags} hpux.ml" ;;
     *-*-irix[56]*)	frags="${frags} irix5.ml" ;;
     *-*-linux*aout*)	;;
+    *-*-freebsd2)	;;
+    *-*-freebsd*)	frags="${frags} freebsd.ml" ;;
     *-*-linux*)		frags="${frags} linux.ml" ;;
     *-*-openbsd*)		frags="${frags} openbsd.ml" ;;
     *-*-sysv[45]*|*-*-udk*)	frags="${frags} elf.ml" ;;