dnl We use this until autoconf fixes its version.
AC_DEFUN([LYX_FUNC_SELECT_ARGTYPES],
[AC_MSG_CHECKING([types of arguments for select()])
 AC_CACHE_VAL(ac_cv_func_select_arg234,dnl
 [AC_CACHE_VAL(ac_cv_func_select_arg1,dnl
  [AC_CACHE_VAL(ac_cv_func_select_arg5,dnl
   [for ac_cv_func_select_arg234 in 'fd_set *' 'int *' 'void *'; do
     for ac_cv_func_select_arg1 in 'int' 'size_t' 'unsigned long' 'unsigned'; do      for ac_cv_func_select_arg5 in 'struct timeval *' 'const struct timeval *'; do
       AC_TRY_COMPILE(dnl
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
extern int select ($ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg234,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5);],,dnl
	[ac_not_found=no ; break 3],ac_not_found=yes)
      done
     done
    done
   ])dnl AC_CACHE_VAL
  ])dnl AC_CACHE_VAL
 ])dnl AC_CACHE_VAL
 if test "$ac_not_found" = yes; then
  ac_cv_func_select_arg1=int
  ac_cv_func_select_arg234='int *'
  ac_cv_func_select_arg5='struct timeval *'
 fi
 AC_MSG_RESULT([$ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5])
 AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1,$ac_cv_func_select_arg1,
		    [Define to the type of arg1 for select().])
 AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234,($ac_cv_func_select_arg234),
		    [Define to the type of args 2, 3 and 4 for select().])
 AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5,($ac_cv_func_select_arg5),
		    [Define to the type of arg5 for select().])
])

dnl Check things are declared in headers to avoid errors or warnings.
dnl Called like LYX_CHECK_DECL(function, headerfile)
dnl Defines HAVE_DECL_{FUNCTION}
AC_DEFUN([LYX_CHECK_DECL],
[AC_MSG_CHECKING(if $1 is declared by header $2)
tr_func=`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`

tr_hdr=`echo $2 | tr . _`
AC_CACHE_VAL([lyx_cv_declare_${tr_hdr}_$1],
[AC_EGREP_HEADER($1, $2, [eval "lyx_cv_declare_${tr_hdr}_$1=yes"], [eval "lyx_cv_declare_${tr_hdr}_$1=no"])])
if eval "test \"\${lyx_cv_declare_${tr_hdr}_$1}\" = \"yes\""; then
	AC_DEFINE_UNQUOTED(HAVE_DECL_${tr_func},1,[dummy])
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi])

dnl This is the multiple headers version of the LYX_CHECK_DECL macro above.
dnl Called like LYX_CHECK_DECL_HDRS(function, file1 file2 file3)
AC_DEFUN([LYX_CHECK_DECL_HDRS],
[ got="no"
for I in $2; do
tr_hdr=`echo $I | tr . _`
if test "${got}" = "no"; then
    LYX_CHECK_DECL($1, $I)
fi
if eval "test \"\${lyx_cv_declare_${tr_hdr}_$1}\" = \"yes\""; then
     got="yes"
fi
done])



dnl Set VAR to the canonically resolved absolute equivalent of PATHNAME,
dnl (which may be a relative path, and need not refer to any existing 
dnl entity).

dnl On Win32-MSYS build hosts, the returned path is resolved to its true
dnl native Win32 path name, (but with slashes, not backslashes).

dnl On any other system, it is simply the result which would be obtained
dnl if PATHNAME represented an existing directory, and the pwd command was
dnl executed in that directory.
AC_DEFUN([MSYS_AC_CANONICAL_PATH],
[ac_dir="$2"
 ( exec 2>/dev/null; cd / && pwd -W ) | grep ':' >/dev/null &&
    ac_pwd_w="pwd -W" || ac_pwd_w=pwd
 until ac_val=`exec 2>/dev/null; cd "$ac_dir" && $ac_pwd_w`
 do
   ac_dir=`dirname "$ac_dir"`
 done
 ac_dir=`echo "$ac_dir" | sed 's?^[[./]]*??'`
 ac_val=`echo "$ac_val" | sed 's?/*$[]??'`
 $1=`echo "$2" | sed "s?^[[./]]*$ac_dir/*?$ac_val/?"'
   s?/*$[]??'`
])