ncurses 5.6 - patch 20080816

[ncurses.git] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index a37d3c3a339bb7121b8ff2d2870fa0daea54c52b..cc6f03d49a511563f95bed776edbf1c2ff27ae06 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -28,7 +28,7 @@ dnl***************************************************************************
 dnl
 dnl Author: Thomas E. Dickey 1995-on
 dnl
-dnl $Id: aclocal.m4,v 1.450 2008/07/26 21:57:19 tom Exp $
+dnl $Id: aclocal.m4,v 1.452 2008/08/16 23:19:46 tom Exp $
 dnl Macros used in NCURSES auto-configuration script.
 dnl
 dnl These macros are maintained separately from NCURSES.  The copyright on
@@ -1715,7 +1715,7 @@ fi
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_HASHED_DB_LIBS version: 7 updated: 2007/12/01 15:01:37
+dnl CF_HASHED_DB_LIBS version: 8 updated: 2008/08/04 06:18:06
 dnl -----------------
 dnl Given that we have the header and version for hashed database, find the
 dnl library information.
@@ -1723,7 +1723,7 @@ AC_DEFUN([CF_HASHED_DB_LIBS],
 [
 AC_CACHE_CHECK(for db libraries, cf_cv_hashed_db_libs,[
 cf_cv_hashed_db_libs=unknown
-for cf_db_libs in db$cf_cv_hashed_db_version db-$cf_cv_hashed_db_version db ''
+for cf_db_libs in "" db$cf_cv_hashed_db_version db-$cf_cv_hashed_db_version db ''
 do
        cf_save_libs="$LIBS"
        if test -n "$cf_db_libs"; then
@@ -4862,6 +4862,32 @@ fi
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_WEAK_SYMBOLS version: 1 updated: 2008/08/16 19:18:06
+dnl ---------------
+dnl Check for compiler-support for weak symbols.
+dnl This works with "recent" gcc.
+AC_DEFUN([CF_WEAK_SYMBOLS],[
+AC_CACHE_CHECK(if $CC supports weak symbols,cf_cv_weak_symbols,[
+
+AC_TRY_COMPILE([
+#include <stdio.h>],
+[
+#if defined(__GNUC__)
+#  if defined __USE_ISOC99
+#    define _cat_pragma(exp)   _Pragma(#exp)
+#    define _weak_pragma(exp)  _cat_pragma(weak name)
+#  else
+#    define _weak_pragma(exp)
+#  endif
+#  define _declare(name)       __extension__ extern __typeof__(name) name
+#  define weak_symbol(name)    _weak_pragma(name) _declare(name) __attribute__((weak))
+#endif
+
+weak_symbol(fopen);
+],[cf_cv_weak_symbols=yes],[cf_cv_weak_symbols=no])
+])
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_WITH_ABI_VERSION version: 1 updated: 2003/09/20 18:12:49
 dnl -------------------
 dnl Allow library's ABI to be overridden.  Generally this happens when a
@@ -5228,7 +5254,7 @@ CF_NO_LEAKS_OPTION(valgrind,
        [USE_VALGRIND])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_SOURCE version: 25 updated: 2007/01/29 18:36:38
+dnl CF_XOPEN_SOURCE version: 26 updated: 2008/07/27 11:26:57
 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,
@@ -5248,7 +5274,7 @@ case $host_os in #(vi
 aix[[45]]*) #(vi
        CPPFLAGS="$CPPFLAGS -D_ALL_SOURCE"
        ;;
-freebsd*) #(vi
+freebsd*|dragonfly*) #(vi
        # 5.x headers associate
        #       _XOPEN_SOURCE=600 with _POSIX_C_SOURCE=200112L
        #       _XOPEN_SOURCE=500 with _POSIX_C_SOURCE=199506L