Add a -showDefaultLibPath option.

A corollary to the previous change, this option prints $libdir.

configure.ac

@@ -1383,6 +1383,7 @@ dnl has it in libc), or if libdl is needed to get it.
 	AC_DEFINE_DIR(__XCONFIGFILE__, XF86CONFIGFILE, [Name of configuration file])
 	AC_DEFINE_DIR(XF86CONFIGFILE, XF86CONFIGFILE, [Name of configuration file])
 	AC_DEFINE_DIR(DEFAULT_MODULE_PATH, moduledir, [Default module search path])
+	AC_DEFINE_DIR(DEFAULT_LIBRARY_PATH, libdir, [Default library install path])
 	AC_DEFINE_DIR(DEFAULT_LOGPREFIX, LOGPREFIX, [Default log location])
 	AC_DEFINE_UNQUOTED(__VENDORDWEBSUPPORT__, ["$VENDOR_WEB"], [Vendor web address for support])
 

hw/xfree86/common/xf86Init.c

@@ -101,6 +101,7 @@
 static void xf86PrintBanner(void);
 static void xf86PrintMarkers(void);
 static void xf86PrintDefaultModulePath(void);
+static void xf86PrintDefaultLibraryPath(void);
 static void xf86RunVtInit(void);
 
 #ifdef __UNIXOS2__
@@ -1382,6 +1383,11 @@ ddxProcessArgument(int argc, char **argv, int i)
     xf86PrintDefaultModulePath();
     exit(0);
   }
+  if (!strcmp(argv[i],"-showDefaultLibPath"))
+  {
+    xf86PrintDefaultLibraryPath();
+    exit(0);
+  }
   /* Notice the -fp flag, but allow it to pass to the dix layer */
   if (!strcmp(argv[i], "-fp"))
   {
@@ -1632,6 +1638,7 @@ ddxUseMsg()
   ErrorF("-isolateDevice bus_id  restrict device resets to bus_id (PCI only)\n");
   ErrorF("-version               show the server version\n");
   ErrorF("-showDefaultModulePath show the server default module path\n");
+  ErrorF("-showDefaultLibPath    show the server default library path\n");
   /* OS-specific usage */
   xf86UseMsg();
   ErrorF("\n");
@@ -1760,6 +1767,12 @@ xf86PrintDefaultModulePath(void)
   ErrorF("%s\n", DEFAULT_MODULE_PATH);
 }
 
+static void
+xf86PrintDefaultLibraryPath(void)
+{
+  ErrorF("%s\n", DEFAULT_LIBRARY_PATH);
+}
+
 static void
 xf86RunVtInit(void)
 {

hw/xfree86/doc/man/Xorg.man.pre

@@ -429,6 +429,9 @@ support.
 .B \-showDefaultModulePath
 Print out the default module path the server was compiled with.
 .TP 8
+.B \-showDefaultLibPath
+Print out the path libraries should be installed to.
+.TP 8
 .BI \-config " file"
 Read the server configuration from
 .IR file .

include/xorg-config.h.in

@@ -45,6 +45,9 @@
 /* Path to loadable modules. */
 #undef DEFAULT_MODULE_PATH
 
+/* Path to installed libraries. */
+#undef DEFAULT_LIBRARY_PATH
+
 /* Path to server log file. */
 #undef DEFAULT_LOGPREFIX