Index: ChangeLog
===================================================================
RCS file: /cvs/autoconf/ChangeLog,v
retrieving revision 1.904
diff -u -r1.904 ChangeLog
--- ChangeLog	2000/10/12 12:45:16	1.904
+++ ChangeLog	2000/10/12 13:13:34
@@ -1,3 +1,9 @@
+2000-10-12  Morten Eriksen <address@hidden>
+
+	* acspecific.m4 (_AC_EXEEXT): Change of strategy for the macro, we
+	now search for a valid executable suffix. The old code had
+	circular dependencies which basically made it fubar.
+
 2000-10-12  Akim Demaille  <address@hidden>
 
 	* tests/mktests.sh: Remove tmp files.
Index: acspecific.m4
===================================================================
RCS file: /cvs/autoconf/acspecific.m4,v
retrieving revision 1.301
diff -u -r1.301 acspecific.m4
--- acspecific.m4	2000/10/12 12:39:25	1.301
+++ acspecific.m4	2000/10/12 13:13:35
@@ -1554,32 +1554,36 @@
 
 # _AC_EXEEXT
 # ----------
-# Check for the extension used for executables.  This knows that we
-# add .exe for Cygwin or mingw32.  Otherwise, it compiles a test
-# executable.  If this is called, the executable extensions will be
-# automatically used by link commands run by the configure script.
+# Check for a valid extension to use for executables.
 define([_AC_EXEEXT],
 [AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
-[case "$CYGWIN $MINGW32 $EMXOS2" in
-  *yes*) ac_cv_exeext=.exe ;;
-  *)
+[# Try to compile and link an executable with no suffix first.
+ac_exeext=
+_AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ [# Ok, we can use an empty suffix for executables. Now see if the
+  # executable with the empty suffix is just a filesystem mapping
+  # from the real file (this happens under Cygwin, for instance).
+  if (test conftest -ef conftest.exe) >/dev/null 2>&1; then
+    # Prefer .exe over empty suffix (to avoid depending
+    # on the Cygwin filesystem voodoo, which is known to fail
+    # with certain tools/commands).
+    ac_cv_exeext=.exe
+  else
+    ac_cv_exeext=
+  fi],
+ [# Couldn't use empty suffix, try with suffix commonly used
+  # on DOS-based platforms.
+  ac_exeext=.exe
   _AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-  [if test ! -f conftest; then
-    for ac_file in conftest.*; do
-       case $ac_file in
-         *.$ac_ext | *.o | *.obj | *.xcoff) ;;
-         *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`;;
-       esac
-     done
-   fi],
-  [AC_MSG_ERROR([cannot compile and link])])
-  test -n "$ac_cv_exeext" && ac_cv_exeext=no;;
-esac])
-EXEEXT=
-test "$ac_cv_exeext" != no && EXEEXT=$ac_cv_exeext
-dnl Setting ac_exeext will implicitly change the ac_link command.
-ac_exeext=$EXEEXT
-AC_SUBST(EXEEXT)dnl
+    [ac_cv_exeext=.exe],
+    [rm -f conftest.$ac_ext conftest.$ac_objext
+     AC_MSG_ERROR(cannot compile and link)])
+ ])
+])
+rm -f conftest.$ac_ext conftest.$ac_objext conftest.$ac_exeext
+ac_exeext=$ac_cv_exeext
+EXEEXT=$ac_cv_exeext
+AC_SUBST(EXEEXT)
 ])# _AC_EXEEXT
 
 
Index: TODO
===================================================================
RCS file: /cvs/autoconf/TODO,v
retrieving revision 1.93
diff -u -r1.93 TODO
--- TODO	2000/10/12 12:45:16	1.93
+++ TODO	2000/10/12 13:24:02
@@ -14,8 +14,7 @@
 egrep, the output files are touch'ed.
 
 ** AC_EXEEXT, AC_OBJEXT
-We need a good implement.  As much as possible, they should not depend
-upon AC_EMXOS2 etc.
+These should be AC_REQUIRE'd where $ac_exeext and $ac_objext is used.
 
 ** More tests
 Check that AC_REQUIRE circular dependencies are caught.