ncurses 5.9 - patch 20120602
[ncurses.git] / Ada95 / aclocal.m4
index c24faf62bc7e7e9e245118d69964c6c7aaab474a..3888b6c1712bd90260ed9628dbf5136914adda61 100644 (file)
@@ -1,5 +1,5 @@
 dnl***************************************************************************
 dnl***************************************************************************
-dnl Copyright (c) 2010,2011 Free Software Foundation, Inc.                   *
+dnl Copyright (c) 2010-2011,2012 Free Software Foundation, Inc.              *
 dnl                                                                          *
 dnl Permission is hereby granted, free of charge, to any person obtaining a  *
 dnl copy of this software and associated documentation files (the            *
 dnl                                                                          *
 dnl Permission is hereby granted, free of charge, to any person obtaining a  *
 dnl copy of this software and associated documentation files (the            *
@@ -28,7 +28,7 @@ dnl***************************************************************************
 dnl
 dnl Author: Thomas E. Dickey
 dnl
 dnl
 dnl Author: Thomas E. Dickey
 dnl
-dnl $Id: aclocal.m4,v 1.33 2011/07/17 00:39:55 tom Exp $
+dnl $Id: aclocal.m4,v 1.49 2012/04/01 00:15:53 tom Exp $
 dnl Macros used in NCURSES Ada95 auto-configuration script.
 dnl
 dnl These macros are maintained separately from NCURSES.  The copyright on
 dnl Macros used in NCURSES Ada95 auto-configuration script.
 dnl
 dnl These macros are maintained separately from NCURSES.  The copyright on
@@ -459,6 +459,35 @@ fi
 AC_SUBST(ARFLAGS)
 ])
 dnl ---------------------------------------------------------------------------
 AC_SUBST(ARFLAGS)
 ])
 dnl ---------------------------------------------------------------------------
+dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
+dnl --------------
+dnl Allow user to disable a normally-on option.
+AC_DEFUN([CF_ARG_DISABLE],
+[CF_ARG_OPTION($1,[$2],[$3],[$4],yes)])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_ARG_OPTION version: 4 updated: 2010/05/26 05:38:42
+dnl -------------
+dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
+dnl values.
+dnl
+dnl Parameters:
+dnl $1 = option name
+dnl $2 = help-string
+dnl $3 = action to perform if option is not default
+dnl $4 = action if perform if option is default
+dnl $5 = default option value (either 'yes' or 'no')
+AC_DEFUN([CF_ARG_OPTION],
+[AC_ARG_ENABLE([$1],[$2],[test "$enableval" != ifelse([$5],no,yes,no) && enableval=ifelse([$5],no,no,yes)
+  if test "$enableval" != "$5" ; then
+ifelse([$3],,[    :]dnl
+,[    $3]) ifelse([$4],,,[
+  else
+    $4])
+  fi],[enableval=$5 ifelse([$4],,,[
+  $4
+])dnl
+  ])])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_BUILD_CC version: 6 updated: 2006/10/14 15:23:15
 dnl -----------
 dnl If we're cross-compiling, allow the user to override the tools and their
 dnl CF_BUILD_CC version: 6 updated: 2006/10/14 15:23:15
 dnl -----------
 dnl If we're cross-compiling, allow the user to override the tools and their
@@ -673,67 +702,66 @@ dnl ----------
 dnl "dirname" is not portable, so we fake it with a shell script.
 AC_DEFUN([CF_DIRNAME],[$1=`echo $2 | sed -e 's%/[[^/]]*$%%'`])dnl
 dnl ---------------------------------------------------------------------------
 dnl "dirname" is not portable, so we fake it with a shell script.
 AC_DEFUN([CF_DIRNAME],[$1=`echo $2 | sed -e 's%/[[^/]]*$%%'`])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ENABLE_PC_FILES version: 3 updated: 2011/07/16 20:37:23
+dnl CF_DISABLE_ECHO version: 11 updated: 2009/12/13 13:16:57
+dnl ---------------
+dnl You can always use "make -n" to see the actual options, but it's hard to
+dnl pick out/analyze warning messages when the compile-line is long.
+dnl
+dnl Sets:
+dnl    ECHO_LT - symbol to control if libtool is verbose
+dnl    ECHO_LD - symbol to prefix "cc -o" lines
+dnl    RULE_CC - symbol to put before implicit "cc -c" lines (e.g., .c.o)
+dnl    SHOW_CC - symbol to put before explicit "cc -c" lines
+dnl    ECHO_CC - symbol to put before any "cc" line
+dnl
+AC_DEFUN([CF_DISABLE_ECHO],[
+AC_MSG_CHECKING(if you want to see long compiling messages)
+CF_ARG_DISABLE(echo,
+       [  --disable-echo          display "compiling" commands],
+       [
+    ECHO_LT='--silent'
+    ECHO_LD='@echo linking [$]@;'
+    RULE_CC='@echo compiling [$]<'
+    SHOW_CC='@echo compiling [$]@'
+    ECHO_CC='@'
+],[
+    ECHO_LT=''
+    ECHO_LD=''
+    RULE_CC=''
+    SHOW_CC=''
+    ECHO_CC=''
+])
+AC_MSG_RESULT($enableval)
+AC_SUBST(ECHO_LT)
+AC_SUBST(ECHO_LD)
+AC_SUBST(RULE_CC)
+AC_SUBST(SHOW_CC)
+AC_SUBST(ECHO_CC)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_ENABLE_PC_FILES version: 7 updated: 2011/12/10 18:58:47
 dnl ------------------
 dnl This is the "--enable-pc-files" option, which is available if there is a
 dnl pkg-config configuration on the local machine.
 dnl ------------------
 dnl This is the "--enable-pc-files" option, which is available if there is a
 dnl pkg-config configuration on the local machine.
-dnl
-dnl It sets/updates PKG_CONFIG_LIBDIR, which is used by pkg-config as a
-dnl special case: overriding PKG_CONFIG_PATH (preferred).
 AC_DEFUN([CF_ENABLE_PC_FILES],[
 AC_DEFUN([CF_ENABLE_PC_FILES],[
-AC_REQUIRE([CF_PATHSEP])
 AC_REQUIRE([CF_PKG_CONFIG])
 AC_REQUIRE([CF_PKG_CONFIG])
+AC_REQUIRE([CF_WITH_PKG_CONFIG_LIBDIR])
 
 
-if test "$PKG_CONFIG" != no ; then
-       AC_MSG_CHECKING(if we should install .pc files for $PKG_CONFIG)
-
-       # Leave this as something that can be overridden in the environment.
-       if test -z "$PKG_CONFIG_LIBDIR" ; then
-               if test -n "$PKG_CONFIG_PATH" ; then
-                       for cf_config in `echo "$PKG_CONFIG_PATH" | sed -e 's/'$PATH_SEPARATOR'/ /g'`
-                       do
-                               if test -n "$cf_config" && test -d "$cf_config"
-                               then
-                                       PKG_CONFIG_LIBDIR=$cf_config
-                                       break
-                               fi
-                       done
-               fi
-               if test -z "$PKG_CONFIG_LIBDIR" ; then
-                       cf_path=`echo "$PKG_CONFIG" | sed -e 's,/[[^/]]*/[[^/]]*$,,'`
-                       case x`arch 2>/dev/null` in #(vi
-                       *64) #(vi
-                               for cf_config in $cf_path/lib64 $cf_path/lib32 $cf_path/lib
-                               do
-                                       if test -d $cf_config/pkgconfig
-                                       then
-                                               PKG_CONFIG_LIBDIR=$cf_config/pkgconfig
-                                               break
-                                       fi
-                               done
-                               ;;
-                       *)
-                               PKG_CONFIG_LIBDIR=$cf_path/lib/pkgconfig
-                               ;;
-                       esac
-               fi
-       else
-               PKG_CONFIG_LIBDIR=`echo "$PKG_CONFIG_LIBDIR" | sed -e 's/^://' -e 's/:.*//'`
-       fi
+if test "$PKG_CONFIG" != none ; then
        if test -n "$PKG_CONFIG_LIBDIR" && test -d "$PKG_CONFIG_LIBDIR" ; then
        if test -n "$PKG_CONFIG_LIBDIR" && test -d "$PKG_CONFIG_LIBDIR" ; then
+               AC_MSG_CHECKING(if we should install .pc files for $PKG_CONFIG)
                AC_ARG_ENABLE(pc-files,
                        [  --enable-pc-files       generate and install .pc files for pkg-config],
                        [enable_pc_files=$enableval],
                        [enable_pc_files=no])
                AC_MSG_RESULT($enable_pc_files)
                AC_ARG_ENABLE(pc-files,
                        [  --enable-pc-files       generate and install .pc files for pkg-config],
                        [enable_pc_files=$enableval],
                        [enable_pc_files=no])
                AC_MSG_RESULT($enable_pc_files)
-               CF_VERBOSE(found library $PKG_CONFIG_LIBDIR)
-       else
-               AC_MSG_RESULT(no)
-               AC_MSG_WARN(did not find library $PKG_CONFIG_LIBDIR)
+       elif test -z "$PKG_CONFIG_LIBDIR" || test "$PKG_CONFIG_LIBDIR" != no; then
                enable_pc_files=no
                enable_pc_files=no
+               AC_MSG_WARN(did not find $PKG_CONFIG library)
        fi
        fi
+else
+       enable_pc_files=no
 fi
 fi
-AC_SUBST(PKG_CONFIG_LIBDIR)
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_FIND_LIBRARY version: 9 updated: 2008/03/23 14:48:54
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_FIND_LIBRARY version: 9 updated: 2008/03/23 14:48:54
@@ -916,6 +944,25 @@ ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_FIXUP_ADAFLAGS version: 1 updated: 2012/03/31 18:48:10
+dnl -----------------
+dnl make ADAFLAGS consistent with CFLAGS
+AC_DEFUN([CF_FIXUP_ADAFLAGS],[
+       AC_MSG_CHECKING(optimization options for ADAFLAGS)
+       case "$CFLAGS" in
+       *-g*)
+               CF_ADD_ADAFLAGS(-g)
+               ;;
+       esac
+       case "$CFLAGS" in
+       *-O*)
+               cf_O_flag=`echo "$CFLAGS" |sed -e 's/^.*-O/-O/' -e 's/[[        ]].*//'`
+               CF_ADD_ADAFLAGS($cf_O_flag)
+               ;;
+       esac
+       AC_MSG_RESULT($ADAFLAGS)
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_GCC_ATTRIBUTES version: 14 updated: 2010/10/23 15:52:32
 dnl -----------------
 dnl Test for availability of useful gcc __attribute__ directives to quiet
 dnl CF_GCC_ATTRIBUTES version: 14 updated: 2010/10/23 15:52:32
 dnl -----------------
 dnl Test for availability of useful gcc __attribute__ directives to quiet
@@ -1040,7 +1087,7 @@ if test "$GCC" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_WARNINGS version: 27 updated: 2010/10/23 15:52:32
+dnl CF_GCC_WARNINGS version: 28 updated: 2012/03/31 20:10:46
 dnl ---------------
 dnl Check if the compiler supports useful warning options.  There's a few that
 dnl we don't use, simply because they're too noisy:
 dnl ---------------
 dnl Check if the compiler supports useful warning options.  There's a few that
 dnl we don't use, simply because they're too noisy:
@@ -1138,6 +1185,13 @@ then
                                        continue;;
                                esac
                                ;;
                                        continue;;
                                esac
                                ;;
+                       Wpointer-arith) #(vi
+                               case $GCC_VERSION in
+                               [[12]].*)
+                                       CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
+                                       continue;;
+                               esac
+                               ;;
                        esac
                        EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
                fi
                        esac
                        EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
                fi
@@ -1420,7 +1474,7 @@ fi
 rm -rf conftest* *~conftest*
 ])dnl
 dnl ---------------------------------------------------------------------------
 rm -rf conftest* *~conftest*
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GNAT_VERSION version: 17 updated: 2011/03/23 20:24:41
+dnl CF_GNAT_VERSION version: 18 updated: 2012/01/21 19:28:10
 dnl ---------------
 dnl Verify version of GNAT.
 AC_DEFUN([CF_GNAT_VERSION],
 dnl ---------------
 dnl Verify version of GNAT.
 AC_DEFUN([CF_GNAT_VERSION],
@@ -1432,7 +1486,7 @@ cf_gnat_version=`${cf_ada_make:-gnatmake} -v 2>&1 | \
 AC_MSG_RESULT($cf_gnat_version)
 
 case $cf_gnat_version in #(vi
 AC_MSG_RESULT($cf_gnat_version)
 
 case $cf_gnat_version in #(vi
-3.1[[1-9]]*|3.[[2-9]]*|[[4-9]].*) #(vi
+3.1[[1-9]]*|3.[[2-9]]*|[[4-9]].*|20[[0-9]][[0-9]]) #(vi
        cf_cv_prog_gnat_correct=yes
        ;;
 *)
        cf_cv_prog_gnat_correct=yes
        ;;
 *)
@@ -1627,7 +1681,7 @@ ifdef([AC_FUNC_FSEEKO],[
 ])
 ])
 dnl ---------------------------------------------------------------------------
 ])
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_LD_RPATH_OPT version: 4 updated: 2011/06/04 20:09:13
+dnl CF_LD_RPATH_OPT version: 5 updated: 2011/07/17 14:48:41
 dnl ---------------
 dnl For the given system and compiler, find the compiler flags to pass to the
 dnl loader to use the "rpath" feature.
 dnl ---------------
 dnl For the given system and compiler, find the compiler flags to pass to the
 dnl loader to use the "rpath" feature.
@@ -1651,7 +1705,7 @@ linux*|gnu*|k*bsd*-gnu) #(vi
 openbsd[[2-9]].*|mirbsd*) #(vi
        LD_RPATH_OPT="-Wl,-rpath,"
        ;;
 openbsd[[2-9]].*|mirbsd*) #(vi
        LD_RPATH_OPT="-Wl,-rpath,"
        ;;
-freebsd*) #(vi
+dragonfly*|freebsd*) #(vi
        LD_RPATH_OPT="-rpath "
        ;;
 netbsd*) #(vi
        LD_RPATH_OPT="-rpath "
        ;;
 netbsd*) #(vi
@@ -1710,11 +1764,11 @@ CF_SUBDIR_PATH($1,$2,lib)
 $1="$cf_library_path_list [$]$1"
 ])dnl
 dnl ---------------------------------------------------------------------------
 $1="$cf_library_path_list [$]$1"
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_LIB_PREFIX version: 8 updated: 2008/09/13 11:34:16
+dnl CF_LIB_PREFIX version: 9 updated: 2012/01/21 19:28:10
 dnl -------------
 dnl Compute the library-prefix for the given host system
 dnl $1 = variable to set
 dnl -------------
 dnl Compute the library-prefix for the given host system
 dnl $1 = variable to set
-AC_DEFUN([CF_LIB_PREFIX],
+define([CF_LIB_PREFIX],
 [
        case $cf_cv_system_name in #(vi
        OS/2*|os2*) #(vi
 [
        case $cf_cv_system_name in #(vi
        OS/2*|os2*) #(vi
@@ -1764,7 +1818,7 @@ fi
 ])
 ])
 dnl ---------------------------------------------------------------------------
 ])
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_LIB_SUFFIX version: 17 updated: 2011/07/02 15:36:04
+dnl CF_LIB_SUFFIX version: 18 updated: 2012/02/25 15:20:07
 dnl -------------
 dnl Compute the library file-suffix from the given model name
 dnl $1 = model name
 dnl -------------
 dnl Compute the library file-suffix from the given model name
 dnl $1 = model name
@@ -1797,7 +1851,7 @@ AC_DEFUN([CF_LIB_SUFFIX],
                        $2='.a'
                        $3=[$]$2
                        ;;
                        $2='.a'
                        $3=[$]$2
                        ;;
-               cygwin*) #(vi
+               cygwin*|mingw*) #(vi
                        $2='.dll'
                        $3='.dll.a'
                        ;;
                        $2='.dll'
                        $3='.dll.a'
                        ;;
@@ -2083,7 +2137,7 @@ fi
 test "$cf_cv_mixedcase" = yes && AC_DEFINE(MIXEDCASE_FILENAMES)
 ])dnl
 dnl ---------------------------------------------------------------------------
 test "$cf_cv_mixedcase" = yes && AC_DEFINE(MIXEDCASE_FILENAMES)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MKSTEMP version: 7 updated: 2010/08/14 18:25:37
+dnl CF_MKSTEMP version: 8 updated: 2012/02/13 20:34:56
 dnl ----------
 dnl Check for a working mkstemp.  This creates two files, checks that they are
 dnl successfully created and distinct (AmigaOS apparently fails on the last).
 dnl ----------
 dnl Check for a working mkstemp.  This creates two files, checks that they are
 dnl successfully created and distinct (AmigaOS apparently fails on the last).
@@ -2125,9 +2179,11 @@ int main()
 }
 ],[cf_cv_func_mkstemp=yes
 ],[cf_cv_func_mkstemp=no
 }
 ],[cf_cv_func_mkstemp=yes
 ],[cf_cv_func_mkstemp=no
-],[AC_CHECK_FUNC(mkstemp)
-])
+],[cf_cv_func_mkstemp=maybe])
 ])
 ])
+if test "x$cf_cv_func_mkstemp" = xmaybe ; then
+       AC_CHECK_FUNC(mkstemp)
+fi
 if test "x$cf_cv_func_mkstemp" = xyes || test "x$ac_cv_func_mkstemp" = xyes ; then
        AC_DEFINE(HAVE_MKSTEMP)
 fi
 if test "x$cf_cv_func_mkstemp" = xyes || test "x$ac_cv_func_mkstemp" = xyes ; then
        AC_DEFINE(HAVE_MKSTEMP)
 fi
@@ -2250,7 +2306,7 @@ printf("old\n");
        ,[$1=no])
 ])dnl
 dnl ---------------------------------------------------------------------------
        ,[$1=no])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CONFIG version: 8 updated: 2010/07/08 05:17:30
+dnl CF_NCURSES_CONFIG version: 9 updated: 2011/11/26 15:42:05
 dnl -----------------
 dnl Tie together the configure-script macros for ncurses.
 dnl Prefer the "-config" script from ncurses 6.x, to simplify analysis.
 dnl -----------------
 dnl Tie together the configure-script macros for ncurses.
 dnl Prefer the "-config" script from ncurses 6.x, to simplify analysis.
@@ -2262,7 +2318,10 @@ AC_DEFUN([CF_NCURSES_CONFIG],
 cf_ncuconfig_root=ifelse($1,,ncurses,$1)
 
 echo "Looking for ${cf_ncuconfig_root}-config"
 cf_ncuconfig_root=ifelse($1,,ncurses,$1)
 
 echo "Looking for ${cf_ncuconfig_root}-config"
-AC_PATH_PROGS(NCURSES_CONFIG,${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config,none)
+
+CF_ACVERSION_CHECK(2.52,
+       [AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
+       [AC_PATH_PROGS(NCURSES_CONFIG, ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)])
 
 if test "$NCURSES_CONFIG" != none ; then
 
 
 if test "$NCURSES_CONFIG" != none ; then
 
@@ -2857,7 +2916,7 @@ AC_SUBST(PROG_EXT)
 test -n "$PROG_EXT" && AC_DEFINE_UNQUOTED(PROG_EXT,"$PROG_EXT")
 ])dnl
 dnl ---------------------------------------------------------------------------
 test -n "$PROG_EXT" && AC_DEFINE_UNQUOTED(PROG_EXT,"$PROG_EXT")
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_PROG_GNAT version: 1 updated: 2010/06/19 15:22:18
+dnl CF_PROG_GNAT version: 2 updated: 2011/10/22 14:01:47
 dnl ------------
 dnl Check for gnatmake, ensure that it is complete.
 AC_DEFUN([CF_PROG_GNAT],[
 dnl ------------
 dnl Check for gnatmake, ensure that it is complete.
 AC_DEFUN([CF_PROG_GNAT],[
@@ -2865,6 +2924,7 @@ cf_ada_make=gnatmake
 AC_CHECK_PROG(gnat_exists, $cf_ada_make, yes, no)
 if test "$ac_cv_prog_gnat_exists" = no; then
    cf_ada_make=
 AC_CHECK_PROG(gnat_exists, $cf_ada_make, yes, no)
 if test "$ac_cv_prog_gnat_exists" = no; then
    cf_ada_make=
+   cf_cv_prog_gnat_correct=no
 else
    CF_GNAT_VERSION
    AC_CHECK_PROG(M4_exists, m4, yes, no)
 else
    CF_GNAT_VERSION
    AC_CHECK_PROG(M4_exists, m4, yes, no)
@@ -2942,7 +3002,7 @@ define([CF_REMOVE_LIB],
 $1=`echo "$2" | sed -e 's/-l$3[[       ]]//g' -e 's/-l$3[$]//'`
 ])dnl
 dnl ---------------------------------------------------------------------------
 $1=`echo "$2" | sed -e 's/-l$3[[       ]]//g' -e 's/-l$3[$]//'`
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SHARED_OPTS version: 67 updated: 2011/07/02 15:36:04
+dnl CF_SHARED_OPTS version: 70 updated: 2012/02/25 15:20:07
 dnl --------------
 dnl --------------
 dnl Attempt to determine the appropriate CC/LD options for creating a shared
 dnl --------------
 dnl --------------
 dnl Attempt to determine the appropriate CC/LD options for creating a shared
@@ -3020,11 +3080,11 @@ AC_DEFUN([CF_SHARED_OPTS],
        aix4.[3-9]*|aix[[5-7]]*) #(vi
                if test "$GCC" = yes; then
                        CC_SHARED_OPTS=
        aix4.[3-9]*|aix[[5-7]]*) #(vi
                if test "$GCC" = yes; then
                        CC_SHARED_OPTS=
-                       MK_SHARED_LIB='${CC} -shared -Wl,-brtl -Wl,-blibpath:${libdir}:/usr/lib -o [$]@'
+                       MK_SHARED_LIB='${CC} -shared -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
                else
                        # CC_SHARED_OPTS='-qpic=large -G'
                        # perhaps "-bM:SRE -bnoentry -bexpall"
                else
                        # CC_SHARED_OPTS='-qpic=large -G'
                        # perhaps "-bM:SRE -bnoentry -bexpall"
-                       MK_SHARED_LIB='${CC} -G -Wl,-brtl -Wl,-blibpath:${libdir}:/usr/lib -o [$]@'
+                       MK_SHARED_LIB='${CC} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
                fi
                ;;
        beos*) #(vi
                fi
                ;;
        beos*) #(vi
@@ -3085,11 +3145,11 @@ CF_EOF
                        cf_shared_soname='`basename $@`'
                fi
                CC_SHARED_OPTS=
                        cf_shared_soname='`basename $@`'
                fi
                CC_SHARED_OPTS=
-               MK_SHARED_LIB='${CC} -shared -Wl,-rpath,${libdir} -Wl,-h,'$cf_shared_soname' -o $@'
+               MK_SHARED_LIB='${CC} -shared -Wl,-rpath,${RPATH_LIST} -Wl,-h,'$cf_shared_soname' -o $@'
                ;;
        irix*) #(vi
                if test "$cf_cv_enable_rpath" = yes ; then
                ;;
        irix*) #(vi
                if test "$cf_cv_enable_rpath" = yes ; then
-                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${libdir} $EXTRA_LDFLAGS"
+                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
                fi
                # tested with IRIX 5.2 and 'cc'.
                if test "$GCC" != yes; then
                fi
                # tested with IRIX 5.2 and 'cc'.
                if test "$GCC" != yes; then
@@ -3106,18 +3166,39 @@ CF_EOF
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
                fi
                if test "$cf_cv_enable_rpath" = yes ; then
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
                fi
                if test "$cf_cv_enable_rpath" = yes ; then
-                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${libdir} $EXTRA_LDFLAGS"
+                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
                fi
                CF_SHARED_SONAME
                MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
                ;;
                fi
                CF_SHARED_SONAME
                MK_SHARED_LIB='${CC} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
                ;;
+       mingw*) #(vi
+               cf_cv_shlib_version=mingw
+               cf_cv_shlib_version_infix=mingw
+               CC_SHARED_OPTS=
+               MK_SHARED_LIB='sh ../mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
+               #MK_SHARED_LIB='${CC} ${CFLAGS} -mdll -Wl,-soname,'$cf_cv_shared_soname',-stats -o $[@]'
+               #MK_SHARED_LIB='${DLLTOOL} --export-all-symbols --output-exp --output-lib $[@]'
+               cat >mk_shared_lib.sh <<-CF_EOF
+               #!/bin/sh
+               SHARED_LIB=\[$]1
+               IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
+               shift
+               cat <<-EOF
+               Linking shared library
+               ** SHARED_LIB \[$]SHARED_LIB
+               ** IMPORT_LIB \[$]IMPORT_LIB
+EOF
+               exec \[$]* -shared -Wl,--out-implib=../lib/\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o ../lib/\[$]{SHARED_LIB}
+CF_EOF
+               chmod +x mk_shared_lib.sh
+               ;;
        openbsd[[2-9]].*|mirbsd*) #(vi
                if test "$DFT_LWR_MODEL" = "shared" ; then
                        LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
                fi
                if test "$cf_cv_enable_rpath" = yes ; then
        openbsd[[2-9]].*|mirbsd*) #(vi
                if test "$DFT_LWR_MODEL" = "shared" ; then
                        LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
                fi
                if test "$cf_cv_enable_rpath" = yes ; then
-                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${libdir} $EXTRA_LDFLAGS"
+                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
                fi
                CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
                CF_SHARED_SONAME
                fi
                CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
                CF_SHARED_SONAME
@@ -3128,12 +3209,12 @@ CF_EOF
                MK_SHARED_LIB='${LD} -Bshareable -o $[@]'
                test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
                ;;
                MK_SHARED_LIB='${LD} -Bshareable -o $[@]'
                test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
                ;;
-       freebsd*) #(vi
+       dragonfly*|freebsd*) #(vi
                CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
                if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
                        LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
                CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
                if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
                        LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
-                       LOCAL_LDFLAGS2="${cf_ld_rpath_opt}\${libdir} $LOCAL_LDFLAGS"
-                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${libdir} $EXTRA_LDFLAGS"
+                       LOCAL_LDFLAGS2="${cf_ld_rpath_opt}\${RPATH_LIST} $LOCAL_LDFLAGS"
+                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
                fi
                CF_SHARED_SONAME
                MK_SHARED_LIB='${LD} -shared -Bshareable -soname=`basename $[@]` -o $[@]'
                fi
                CF_SHARED_SONAME
                MK_SHARED_LIB='${LD} -shared -Bshareable -soname=`basename $[@]` -o $[@]'
@@ -3143,7 +3224,7 @@ CF_EOF
                if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
                        LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
                if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
                        LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
                        LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
-                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${libdir} $EXTRA_LDFLAGS"
+                       EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
                        if test "$cf_cv_shlib_version" = auto; then
                        if test -f /usr/libexec/ld.elf_so; then
                                cf_cv_shlib_version=abi
                        if test "$cf_cv_shlib_version" = auto; then
                        if test -f /usr/libexec/ld.elf_so; then
                                cf_cv_shlib_version=abi
@@ -3248,9 +3329,12 @@ CF_EOF
                ;;
        esac
 
                ;;
        esac
 
-       if test -n "$cf_ld_rpath_opt" ; then
-               MK_SHARED_LIB="$MK_SHARED_LIB $cf_ld_rpath_opt\${libdir}"
-       fi
+       # RPATH_LIST is a colon-separated list of directories
+       test -n "$cf_ld_rpath_opt" && MK_SHARED_LIB="$MK_SHARED_LIB $cf_ld_rpath_opt\${RPATH_LIST}"
+       test -z "$RPATH_LIST" && RPATH_LIST="\${libdir}"
+
+       CF_VERBOSE(CC_SHARED_OPTS: $CC_SHARED_OPTS)
+       CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)
 
        AC_SUBST(CC_SHARED_OPTS)
        AC_SUBST(LD_RPATH_OPT)
 
        AC_SUBST(CC_SHARED_OPTS)
        AC_SUBST(LD_RPATH_OPT)
@@ -3262,6 +3346,7 @@ CF_EOF
        AC_SUBST(LOCAL_LDFLAGS)
        AC_SUBST(LOCAL_LDFLAGS2)
        AC_SUBST(INSTALL_LIB)
        AC_SUBST(LOCAL_LDFLAGS)
        AC_SUBST(LOCAL_LDFLAGS2)
        AC_SUBST(INSTALL_LIB)
+       AC_SUBST(RPATH_LIST)
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_SHARED_SONAME version: 3 updated: 2008/09/08 18:34:43
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_SHARED_SONAME version: 3 updated: 2008/09/08 18:34:43
@@ -3378,6 +3463,45 @@ top_builddir=`pwd`
 AC_SUBST(top_builddir)
 ])dnl
 dnl ---------------------------------------------------------------------------
 AC_SUBST(top_builddir)
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_TRY_XOPEN_SOURCE version: 1 updated: 2011/10/30 17:09:50
+dnl -------------------
+dnl If _XOPEN_SOURCE is not defined in the compile environment, check if we
+dnl can define it successfully.
+AC_DEFUN([CF_TRY_XOPEN_SOURCE],[
+AC_CACHE_CHECK(if we should define _XOPEN_SOURCE,cf_cv_xopen_source,[
+       AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+],[
+#ifndef _XOPEN_SOURCE
+make an error
+#endif],
+       [cf_cv_xopen_source=no],
+       [cf_save="$CPPFLAGS"
+        CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
+        AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+],[
+#ifdef _XOPEN_SOURCE
+make an error
+#endif],
+       [cf_cv_xopen_source=no],
+       [cf_cv_xopen_source=$cf_XOPEN_SOURCE])
+       CPPFLAGS="$cf_save"
+       ])
+])
+
+if test "$cf_cv_xopen_source" != no ; then
+       CF_REMOVE_DEFINE(CFLAGS,$CFLAGS,_XOPEN_SOURCE)
+       CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,_XOPEN_SOURCE)
+       cf_temp_xopen_source="-D_XOPEN_SOURCE=$cf_cv_xopen_source"
+       CF_ADD_CFLAGS($cf_temp_xopen_source)
+fi
+])
+dnl ---------------------------------------------------------------------------
 dnl CF_UPPER version: 5 updated: 2001/01/29 23:40:59
 dnl --------
 dnl Make an uppercase version of a variable
 dnl CF_UPPER version: 5 updated: 2001/01/29 23:40:59
 dnl --------
 dnl Make an uppercase version of a variable
@@ -3540,6 +3664,32 @@ then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_WITH_LIB_PREFIX version: 1 updated: 2012/01/21 19:28:10
+dnl ------------------
+dnl Allow the library-prefix to be overridden.  OS/2 EMX originally had no
+dnl "lib" prefix, e.g., because it used the dll naming convention.
+dnl
+dnl $1 = variable to set
+AC_DEFUN([CF_WITH_LIB_PREFIX],
+[
+AC_MSG_CHECKING(if you want to have a library-prefix)
+AC_ARG_WITH(lib-prefix,
+       [  --with-lib-prefix       override library-prefix],
+       [with_lib_prefix=$withval],
+       [with_lib_prefix=auto])
+AC_MSG_RESULT($with_lib_prefix)
+
+if test $with_lib_prefix = auto
+then
+       CF_LIB_PREFIX($1)
+elif test $with_lib_prefix = no
+then
+       LIB_PREFIX=
+else
+       LIB_PREFIX=$with_lib_prefix
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_WITH_PATH version: 10 updated: 2010/10/23 15:44:18
 dnl ------------
 dnl Wrapper for AC_ARG_WITH to ensure that user supplies a pathname, not just
 dnl CF_WITH_PATH version: 10 updated: 2010/10/23 15:44:18
 dnl ------------
 dnl Wrapper for AC_ARG_WITH to ensure that user supplies a pathname, not just
@@ -3561,7 +3711,50 @@ $3="$withval"
 AC_SUBST($3)dnl
 ])dnl
 dnl ---------------------------------------------------------------------------
 AC_SUBST($3)dnl
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_WITH_PTHREAD version: 3 updated: 2010/05/29 16:31:02
+dnl CF_WITH_PKG_CONFIG_LIBDIR version: 2 updated: 2011/12/10 18:58:47
+dnl -------------------------
+dnl Allow the choice of the pkg-config library directory to be overridden.
+AC_DEFUN([CF_WITH_PKG_CONFIG_LIBDIR],[
+if test "$PKG_CONFIG" != none ; then
+       AC_MSG_CHECKING(for $PKG_CONFIG library directory)
+       AC_ARG_WITH(pkg-config-libdir,
+               [  --with-pkg-config-libdir=XXX use given directory for installing pc-files],
+               [PKG_CONFIG_LIBDIR=$withval],
+               [PKG_CONFIG_LIBDIR=yes])
+
+       case x$PKG_CONFIG_LIBDIR in #(vi
+       x/*) #(vi
+               ;;
+       xyes) #(vi
+               # look for the library directory using the same prefix as the executable
+               cf_path=`echo "$PKG_CONFIG" | sed -e 's,/[[^/]]*/[[^/]]*$,,'`
+               case x`(arch) 2>/dev/null` in #(vi
+               *64) #(vi
+                       for cf_config in $cf_path/share $cf_path/lib64 $cf_path/lib32 $cf_path/lib
+                       do
+                               if test -d $cf_config/pkgconfig
+                               then
+                                       PKG_CONFIG_LIBDIR=$cf_config/pkgconfig
+                                       break
+                               fi
+                       done
+                       ;;
+               *)
+                       PKG_CONFIG_LIBDIR=$cf_path/lib/pkgconfig
+                       ;;
+               esac
+               ;;
+       *)
+               ;;
+       esac
+
+       AC_MSG_RESULT($PKG_CONFIG_LIBDIR)
+fi
+
+AC_SUBST(PKG_CONFIG_LIBDIR)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_PTHREAD version: 5 updated: 2011/12/10 19:01:56
 dnl ---------------
 dnl Check for POSIX thread library.
 AC_DEFUN([CF_WITH_PTHREAD],
 dnl ---------------
 dnl Check for POSIX thread library.
 AC_DEFUN([CF_WITH_PTHREAD],
@@ -3577,28 +3770,33 @@ if test "$with_pthread" != no ; then
     AC_CHECK_HEADER(pthread.h,[
         AC_DEFINE(HAVE_PTHREADS_H)
 
     AC_CHECK_HEADER(pthread.h,[
         AC_DEFINE(HAVE_PTHREADS_H)
 
-        AC_MSG_CHECKING(if we can link with the pthread library)
-        cf_save_LIBS="$LIBS"
-        CF_ADD_LIB(pthread)
-        AC_TRY_LINK([
+       for cf_lib_pthread in pthread c_r
+       do
+           AC_MSG_CHECKING(if we can link with the $cf_lib_pthread library)
+           cf_save_LIBS="$LIBS"
+           CF_ADD_LIB($cf_lib_pthread)
+           AC_TRY_LINK([
 #include <pthread.h>
 ],[
 #include <pthread.h>
 ],[
-        int rc = pthread_create(0,0,0,0);
+               int rc = pthread_create(0,0,0,0);
+               int r2 = pthread_mutexattr_settype(0, 0);
 ],[with_pthread=yes],[with_pthread=no])
 ],[with_pthread=yes],[with_pthread=no])
-        LIBS="$cf_save_LIBS"
-        AC_MSG_RESULT($with_pthread)
-
-        if test "$with_pthread" = yes ; then
-            CF_ADD_LIB(pthread)
-            AC_DEFINE(HAVE_LIBPTHREADS)
-        else
-            AC_MSG_ERROR(Cannot link with pthread library)
-        fi
+           LIBS="$cf_save_LIBS"
+           AC_MSG_RESULT($with_pthread)
+           test "$with_pthread" = yes && break
+       done
+
+       if test "$with_pthread" = yes ; then
+           CF_ADD_LIB($cf_lib_pthread)
+           AC_DEFINE(HAVE_LIBPTHREADS)
+       else
+           AC_MSG_ERROR(Cannot link with pthread library)
+       fi
     ])
 fi
 ])
 dnl ---------------------------------------------------------------------------
     ])
 fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_SOURCE version: 36 updated: 2011/07/02 15:36:04
+dnl CF_XOPEN_SOURCE version: 42 updated: 2012/01/07 08:26:49
 dnl ---------------
 dnl Try to get _XOPEN_SOURCE defined properly that we can use POSIX functions,
 dnl or adapt to the vendor's definitions to get equivalent functionality,
 dnl ---------------
 dnl Try to get _XOPEN_SOURCE defined properly that we can use POSIX functions,
 dnl or adapt to the vendor's definitions to get equivalent functionality,
@@ -3625,6 +3823,7 @@ darwin[[0-8]].*) #(vi
        ;;
 darwin*) #(vi
        cf_xopen_source="-D_DARWIN_C_SOURCE"
        ;;
 darwin*) #(vi
        cf_xopen_source="-D_DARWIN_C_SOURCE"
+       cf_XOPEN_SOURCE=
        ;;
 freebsd*|dragonfly*) #(vi
        # 5.x headers associate
        ;;
 freebsd*|dragonfly*) #(vi
        # 5.x headers associate
@@ -3642,15 +3841,23 @@ hpux*) #(vi
        ;;
 irix[[56]].*) #(vi
        cf_xopen_source="-D_SGI_SOURCE"
        ;;
 irix[[56]].*) #(vi
        cf_xopen_source="-D_SGI_SOURCE"
+       cf_XOPEN_SOURCE=
        ;;
 linux*|gnu*|mint*|k*bsd*-gnu) #(vi
        CF_GNU_SOURCE
        ;;
 mirbsd*) #(vi
        ;;
 linux*|gnu*|mint*|k*bsd*-gnu) #(vi
        CF_GNU_SOURCE
        ;;
 mirbsd*) #(vi
-       # setting _XOPEN_SOURCE or _POSIX_SOURCE breaks <arpa/inet.h>
+       # setting _XOPEN_SOURCE or _POSIX_SOURCE breaks <sys/select.h> and other headers which use u_int / u_short types
+       cf_XOPEN_SOURCE=
+       CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
        ;;
 netbsd*) #(vi
        ;;
 netbsd*) #(vi
-       # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
+       cf_xopen_source="-D_NETBSD_SOURCE" # setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw
+       ;;
+openbsd[[4-9]]*) #(vi
+       # setting _XOPEN_SOURCE lower than 500 breaks g++ compile with wchar.h, needed for ncursesw
+       cf_xopen_source="-D_BSD_SOURCE"
+       cf_XOPEN_SOURCE=600
        ;;
 openbsd*) #(vi
        # setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
        ;;
 openbsd*) #(vi
        # setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
@@ -3664,36 +3871,11 @@ nto-qnx*) #(vi
 sco*) #(vi
        # setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
        ;;
 sco*) #(vi
        # setting _XOPEN_SOURCE breaks Lynx on SCO Unix / OpenServer
        ;;
-solaris2.1[[0-9]]) #(vi
-       cf_xopen_source="-D__EXTENSIONS__ -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
-       ;;
-solaris2.[[1-9]]) #(vi
+solaris2.*) #(vi
        cf_xopen_source="-D__EXTENSIONS__"
        ;;
 *)
        cf_xopen_source="-D__EXTENSIONS__"
        ;;
 *)
-       AC_CACHE_CHECK(if we should define _XOPEN_SOURCE,cf_cv_xopen_source,[
-       AC_TRY_COMPILE([#include <sys/types.h>],[
-#ifndef _XOPEN_SOURCE
-make an error
-#endif],
-       [cf_cv_xopen_source=no],
-       [cf_save="$CPPFLAGS"
-        CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=$cf_XOPEN_SOURCE"
-        AC_TRY_COMPILE([#include <sys/types.h>],[
-#ifdef _XOPEN_SOURCE
-make an error
-#endif],
-       [cf_cv_xopen_source=no],
-       [cf_cv_xopen_source=$cf_XOPEN_SOURCE])
-       CPPFLAGS="$cf_save"
-       ])
-])
-       if test "$cf_cv_xopen_source" != no ; then
-               CF_REMOVE_DEFINE(CFLAGS,$CFLAGS,_XOPEN_SOURCE)
-               CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,_XOPEN_SOURCE)
-               cf_temp_xopen_source="-D_XOPEN_SOURCE=$cf_cv_xopen_source"
-               CF_ADD_CFLAGS($cf_temp_xopen_source)
-       fi
+       CF_TRY_XOPEN_SOURCE
        CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
        ;;
 esac
        CF_POSIX_C_SOURCE($cf_POSIX_C_SOURCE)
        ;;
 esac
@@ -3701,4 +3883,33 @@ esac
 if test -n "$cf_xopen_source" ; then
        CF_ADD_CFLAGS($cf_xopen_source)
 fi
 if test -n "$cf_xopen_source" ; then
        CF_ADD_CFLAGS($cf_xopen_source)
 fi
+
+dnl In anything but the default case, we may have system-specific setting
+dnl which is still not guaranteed to provide all of the entrypoints that
+dnl _XOPEN_SOURCE would yield.
+if test -n "$cf_XOPEN_SOURCE" && test -z "$cf_cv_xopen_source" ; then
+       AC_MSG_CHECKING(if _XOPEN_SOURCE really is set)
+       AC_TRY_COMPILE([#include <stdlib.h>],[
+#ifndef _XOPEN_SOURCE
+make an error
+#endif],
+       [cf_XOPEN_SOURCE_set=yes],
+       [cf_XOPEN_SOURCE_set=no])
+       AC_MSG_RESULT($cf_XOPEN_SOURCE_set)
+       if test $cf_XOPEN_SOURCE_set = yes
+       then
+               AC_TRY_COMPILE([#include <stdlib.h>],[
+#if (_XOPEN_SOURCE - 0) < $cf_XOPEN_SOURCE
+make an error
+#endif],
+               [cf_XOPEN_SOURCE_set_ok=yes],
+               [cf_XOPEN_SOURCE_set_ok=no])
+               if test $cf_XOPEN_SOURCE_set_ok = no
+               then
+                       AC_MSG_WARN(_XOPEN_SOURCE is lower than requested)
+               fi
+       else
+               CF_TRY_XOPEN_SOURCE
+       fi
+fi
 ])
 ])