t-mingw32 (NATIVE_SYSTEM_HEADER_DIR): Set it.

	* config/i386/t-mingw32 (NATIVE_SYSTEM_HEADER_DIR): Set it.
	* doc/fragments.texi (NATIVE_SYSTEM_HEADER_DIR): Document it.

From-SVN: r102670

gcc/ChangeLog

+2005-08-02  Mark Mitchell  <mark@codesourcery.com>
+
+	* config/i386/t-mingw32 (NATIVE_SYSTEM_HEADER_DIR): Set it.
+	* doc/fragments.texi (NATIVE_SYSTEM_HEADER_DIR): Document it.
+
 2005-08-02  Richard Henderson  <rth@redhat.com>
 
 	PR 23196

gcc/config/i386/t-mingw32

 # We hide calls to w32api needed for w32 thread support here:
 LIB2FUNCS_EXTRA = $(srcdir)/config/i386/gthr-win32.c
+
+# Match SYSTEM_INCLUDE_DIR
+NATIVE_SYSTEM_HEADER_DIR = /mingw/include

gcc/doc/fragments.texi

@@ -151,6 +151,12 @@ compiler.  In that case, set @code{MULTILIB_EXTRA_OPTS} to be the list
 of options to be used for all builds.  If you set this, you should
 probably set @code{CRTSTUFF_T_CFLAGS} to a dash followed by it.
 
+@findex NATIVE_SYSTEM_HEADER_DIR
+@item NATIVE_SYSTEM_HEADER_DIR
+If the default location for system headers is not @file{/usr/include},
+you must set this to the directory containing the headers.  This value
+should match the value of the @code{SYSTEM_INCLUDE_DIR} macro.
+
 @findex SPECS
 @item SPECS
 Unfortunately, setting @code{MULTILIB_EXTRA_OPTS} is not enough, since