corrected install program for Mac OS X (use AC_PROG_INSTALL but add -p option

to INSTALL_PROGRAM and INSTALL_DATA in order to preserve modification dates)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12295 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -1458,20 +1458,17 @@ AC_CHECK_PROG(AR, ar, ar, ar)
 
 dnl install checks
 dnl   defines INSTALL with the appropriate command
+AC_PROG_INSTALL
 case "${host}" in
 
     dnl  The other BSD's should probably go in here too, since this is
     dnl  to workaround a strange static lib BSDism.
     powerpc-*-darwin* )
-        INSTALL="cp -p"
-        INSTALL_PROGRAM="cp -p"
-        INSTALL_DATA="cp -p"
-        AC_SUBST(INSTALL)
-        AC_SUBST(INSTALL_PROGRAM)
-        AC_SUBST(INSTALL_DATA)
+        INSTALL_PROGRAM="$INSTALL_PROGRAM -p"
+        INSTALL_DATA="$INSTALL_DATA -p"
         ;;
     *)
-        AC_PROG_INSTALL
+        ;;
 esac
 
 dnl strip command