(install-common-headers): Use $(assertdir).

(assertdir): New variable.

From-SVN: r2344

gcc/Makefile.in

@@ -143,6 +143,8 @@ libdir = $(exec_prefix)/lib
 libsubdir = $(libdir)/gcc-lib/$(target)/$(version)
 # Directory for header file assert.h.
 includedir = $(prefix)/include
+# assertdir is overridden in cross-make.
+assertdir = $(includedir)
 # Extension (if any) to put in installed man-page filename.
 manext = .1
 # Directory in which to put man pages.
@@ -1489,12 +1491,12 @@ install-common-headers: install-dir $(USER_H) gvarargs.h gstdarg.h gstddef.h
 	done
 # Put assert.h in /usr/local/include, so it won't override GNU libc's assert.h.
 # Don't replace the assert.h already there if it is not from GCC.
-	if [ -f $(includedir)/assert.h ] && ! grep "__eprintf" $(includedir)/assert.h; \
+	if [ -f $(assertdir)/assert.h ] && ! grep "__eprintf" $(assertdir)/assert.h; \
 	then true; \
 	else \
-	  rm -f $(includedir)/assert.h; \
-	  $(INSTALL_DATA) $(srcdir)/assert.h $(includedir)/assert.h; \
-	  chmod a-x $(includedir)/include/assert.h; \
+	  rm -f $(assertdir)/assert.h; \
+	  $(INSTALL_DATA) $(srcdir)/assert.h $(assertdir)/assert.h; \
+	  chmod a-x $(assertdir)/include/assert.h; \
 	fi
 	-rm -f $(libsubdir)/include/varargs.h
 	$(INSTALL_DATA) $(srcdir)/gvarargs.h $(libsubdir)/include/varargs.h