[glibc] Stop checking if MiG supports retcode.

[glibc] Stop checking if MiG supports retcode.

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3ca9f43d1007956251130ee5a59abb63bff8a6b6

commit 3ca9f43d1007956251130ee5a59abb63bff8a6b6
Author: Flavio Cruz <flaviocruz@gmail.com>
Date:   Wed May 10 01:20:34 2023 -0400

    Stop checking if MiG supports retcode.
    
    We already did the same change for Hurd
    (https://git.savannah.gnu.org/cgit/hurd/hurd.git/commit/?id=ef5924402864ef049f40a39e73967628583bc1a4)
    
    Due to MiG requiring the subsystem to be defined early in order to know the
    size of a port, this was causing a division by zero error during ./configure.
    We could have just move subsystem to the top of the snippet, however it is
    simpler to just remove the check given that we have no plans to use some other
    MiG anyway.
    
    HAVE_MIG_RETCODE is removed completely since this will be a no-op either
    way (compiling against old Hurd headers will work the same, new Hurd
    headers will result in the same stubs since retcode is a no-op).
    Message-Id: <ZFspor91aoMwbh9T@jupiter.tail36e24.ts.net>

Diff:
---
 config.h.in               |  3 ---
 sysdeps/mach/configure    | 36 ------------------------------------
 sysdeps/mach/configure.ac | 26 --------------------------
 3 files changed, 65 deletions(-)

diff --git a/config.h.in b/config.h.in
index c87008b6a9..44a34072a4 100644
--- a/config.h.in
+++ b/config.h.in
@@ -150,9 +150,6 @@
 /* Override abi-tags ABI version if necessary.  */
 #undef  __ABI_TAG_VERSION
 
-/* Mach/Hurd specific: define if mig supports the `retcode' keyword.  */
-#undef	HAVE_MIG_RETCODE
-
 /* Mach specific: define if the `host_page_size' RPC is available.  */
 #undef	HAVE_HOST_PAGE_SIZE
 
diff --git a/sysdeps/mach/configure b/sysdeps/mach/configure
index b08872b8bc..df20d8640f 100644
--- a/sysdeps/mach/configure
+++ b/sysdeps/mach/configure
@@ -485,40 +485,4 @@ if test $libc_cv_mach_i386_gdt = yes; then
 fi
 
 
-
-# See if mig groks `retcode'.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $MIG supports the retcode keyword" >&5
-$as_echo_n "checking whether $MIG supports the retcode keyword... " >&6; }
-if ${hurd_cv_mig_retcode+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.defs <<\EOF
-#include <mach/std_types.defs>
-#include <mach/mach_types.defs>
-subsystem foobar 1000;
-type reply_port_t = polymorphic | MACH_MSG_TYPE_PORT_SEND_ONCE
-	ctype: mach_port_t;
-simpleroutine foobar_reply (
-	reply_port: reply_port_t;
-	err: kern_return_t, RetCode);
-EOF
-if { ac_try='CC="${CC}" ${MIG-false} -n conftest.defs 1>&5'
-  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then
-  hurd_cv_mig_retcode=yes
-else
-  hurd_cv_mig_retcode=no
-fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hurd_cv_mig_retcode" >&5
-$as_echo "$hurd_cv_mig_retcode" >&6; }
-if test $hurd_cv_mig_retcode = yes; then
-  $as_echo "#define HAVE_MIG_RETCODE 1" >>confdefs.h
-
-fi
-
 CPPFLAGS=$OLD_CPPFLAGS
diff --git a/sysdeps/mach/configure.ac b/sysdeps/mach/configure.ac
index 537677c1d7..869cc9f820 100644
--- a/sysdeps/mach/configure.ac
+++ b/sysdeps/mach/configure.ac
@@ -104,30 +104,4 @@ if test $libc_cv_mach_i386_gdt = yes; then
   AC_DEFINE([HAVE_I386_SET_GDT])
 fi
 
-dnl Swiped from hurd/aclocal.m4
-AC_DEFUN([hurd_MIG_RETCODE], [dnl
-# See if mig groks `retcode'.
-AC_CACHE_CHECK(whether $MIG supports the retcode keyword, hurd_cv_mig_retcode,
-[cat > conftest.defs <<\EOF
-#include <mach/std_types.defs>
-#include <mach/mach_types.defs>
-subsystem foobar 1000;
-type reply_port_t = polymorphic | MACH_MSG_TYPE_PORT_SEND_ONCE
-	ctype: mach_port_t;
-simpleroutine foobar_reply (
-	reply_port: reply_port_t;
-	err: kern_return_t, RetCode);
-EOF
-if AC_TRY_COMMAND([CC="${CC}" ${MIG-false} -n conftest.defs 1>&AS_MESSAGE_LOG_FD]); then
-  hurd_cv_mig_retcode=yes
-else
-  hurd_cv_mig_retcode=no
-fi
-rm -f conftest*])
-if test $hurd_cv_mig_retcode = yes; then
-  AC_DEFINE(HAVE_MIG_RETCODE)
-fi])
-
-hurd_MIG_RETCODE
-
 CPPFLAGS=$OLD_CPPFLAGS