hurd: Avoid using ino64_t and loff_t in headers

* mach/Machrules ($(patsubst %,$(objpfx)%.h,$(user-interfaces)):
	Process mig output through $(migheaderpipe).
	* hurd/Makefile (migheaderpipe): Define variable.

ChangeLog

@@ -17,6 +17,9 @@
 	* hurd/hurd/fd.h (_hurd_fd_error): Fix struct initializer to be
 	trivial, for C++ conformity.
 	* sysdeps/mach/hurd/dl-sysdep.c: Include <mach/machine/vm_param.h>.
+	* mach/Machrules ($(patsubst %,$(objpfx)%.h,$(user-interfaces)):
+	Process mig output through $(migheadersed).
+	* hurd/Makefile (migheadersed): Define variable.
 
 2018-03-03  Andreas Schwab  <schwab@linux-m68k.org>
 

hurd/Makefile

@@ -86,6 +86,8 @@ generated += $(inlines:=.c)
 CFLAGS-hurdstartup.o = $(no-stack-protector)
 CFLAGS-RPC_exec_startup_get_info.o = $(no-stack-protector)
 
+# Make generated headers compatible with all support standards
+migheaderpipe := | sed -e 's/\<ino64_t\>/__ino64_t/' -e 's/\<loff_t\>/__loff_t/'
 include ../mach/Machrules
 include ../Rules
 

mach/Machrules

@@ -29,6 +29,7 @@
 # _S_rpcname.
 
 # Includers can also add to or modify `migdefines' to set MiG flags.
+# They can also set `migheaderpipe' to mangle the MiG header output.
 
 all:
 
@@ -176,7 +177,7 @@ $(patsubst %,$(objpfx)%.h,$(user-interfaces)): $(objpfx)%.h: $(objpfx)%.__h \
 							     $(objpfx)%.uh
 # The last line of foo.__h is "#endif _foo_user_".
 # The first two lines of foo.uh are "#ifndef _foo_user_"/"#define _foo_user_".
-	(sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) > $@-new
+	(sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) $(migheaderpipe) > $@-new
 	mv -f $@-new $@
 
 interface-routines := $(foreach if,$(user-interfaces),			\