GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.

AC_CHECK_TOOL(MIG, mig, MISSING)

if test "x$MIG" = xMISSING; then

  AC_MSG_ERROR([cannot find required build tool mig])

fi

LIBC_CONFIG_VAR([MIG], [$MIG])

if test -n "$sysheaders"; then

  OLD_CPPFLAGS=$CPPFLAGS

  CPPFLAGS="$CPPFLAGS $SYSINCLUDES"

fi

### Sanity checks for Mach header installation

AC_CHECK_HEADER(mach/mach_types.h,,

                [AC_MSG_ERROR([cannot find Mach headers])], -)

AC_CHECK_HEADER(mach/mach_types.defs,, [dnl

AC_MSG_ERROR([cannot find Mach .defs files])], -)

dnl

dnl mach_TYPE_CHECK(foo_t, bar_t)

dnl

dnl Check if foo_t is defined by <mach/mach_types.h>.

dnl If not, compile with -Dfoo_t=bar_t.

dnl

AC_DEFUN([mach_TYPE_CHECK], [dnl

AC_CACHE_CHECK(for $1 in mach/mach_types.h, libc_cv_mach_$1,

AC_TRY_COMPILE([#include <mach/mach_types.h>], [extern $1 foo;],

libc_cv_mach_$1=$1, libc_cv_mach_$1=$2))

if test [$]libc_cv_mach_$1 != $1; then

  DEFINES="$DEFINES -D$1=$2"

fi])

dnl

dnl OSF Mach has renamed these typedefs for some reason.

dnl

mach_TYPE_CHECK(task_t, task_port_t)

mach_TYPE_CHECK(thread_t, thread_port_t)

dnl

dnl The creation_time field is a GNU Mach addition the other variants lack.

dnl

AC_CACHE_CHECK(for creation_time in task_basic_info,

	       libc_cv_mach_task_creation_time, [dnl

AC_TRY_COMPILE([#include <mach/task_info.h>], [

extern struct task_basic_info *i;

long s = i->creation_time.seconds;

], libc_cv_mach_task_creation_time=yes, libc_cv_mach_task_creation_time=no)])

if test $libc_cv_mach_task_creation_time = no; then

  AC_MSG_ERROR([you need Mach headers supporting task_info.creation_time])

fi

dnl

dnl The Darwin variant no longer has <mach/mach.defs>

dnl but instead has several constituent .defs files.

dnl In this scenario we will presume there is a <mach/mach_interface.h>

dnl that contains an #include for each constituent header file,

dnl but we don't do a check for that here because in a bare

dnl environment the compile against those headers will fail.

dnl

mach_interface_list=

for ifc in mach mach4 gnumach \

	   clock clock_priv host_priv host_security ledger lock_set \

	   processor processor_set task task_notify thread_act vm_map \

	   memory_object memory_object_default default_pager \

	   i386/mach_i386 \

	   ; do

  AC_CHECK_HEADER(mach/${ifc}.defs, [dnl

  mach_interface_list="$mach_interface_list $ifc"],, -)

done

if test "x$mach_interface_list" = x; then

  AC_MSG_ERROR([what manner of Mach is this?])

fi

AC_CACHE_CHECK(for host_page_size in mach_host.defs,

	       libc_cv_mach_host_page_size, [dnl

AC_EGREP_HEADER(host_page_size, mach/mach_host.defs,

		libc_cv_mach_host_page_size=yes,

		libc_cv_mach_host_page_size=no)])

if test $libc_cv_mach_host_page_size = yes; then

  AC_DEFINE([HAVE_HOST_PAGE_SIZE])

fi

AC_CHECK_HEADER(mach/machine/ndr_def.h, [dnl

  DEFINES="$DEFINES -DNDR_DEF_HEADER='<mach/machine/ndr_def.h>'"], [dnl

AC_CHECK_HEADER(machine/ndr_def.h, [dnl

  DEFINES="$DEFINES -DNDR_DEF_HEADER='<machine/ndr_def.h>'"],, -)], -)

AC_CACHE_CHECK(for i386_io_perm_modify in mach_i386.defs,

	       libc_cv_mach_i386_ioports, [dnl

AC_EGREP_HEADER(i386_io_perm_modify, mach/i386/mach_i386.defs,

		libc_cv_mach_i386_ioports=yes,

		libc_cv_mach_i386_ioports=no)])

if test $libc_cv_mach_i386_ioports = yes; then

  AC_DEFINE([HAVE_I386_IO_PERM_MODIFY])

fi

AC_CACHE_CHECK(for i386_set_gdt in mach_i386.defs,

	       libc_cv_mach_i386_gdt, [dnl

AC_EGREP_HEADER(i386_set_gdt, mach/i386/mach_i386.defs,

		libc_cv_mach_i386_gdt=yes,

		libc_cv_mach_i386_gdt=no)])

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

if test -n "$sysheaders"; then

  CPPFLAGS=$OLD_CPPFLAGS

fi