i960 compilers create `b.out' files by default.

Reported by Ralf Corsepius.
* lib/autoconf/lang.m4 (_AC_COMPILER_EXEEXT): Remove b.out files.
(_AC_COMPILER_EXEEXT_DEFAULT): Adjust to b.out.

diff --git a/ChangeLog b/ChangeLog
index da0effbac41891ec998371083da4838e9744ba11..65a6f9fece98055f77810949a5d25a9499eb95d7 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2002-09-16  Akim Demaille  <akim@epita.fr>
+
+       i960 compilers create `b.out' files by default.
+       Reported by Ralf Corsepius.
+
+       * lib/autoconf/lang.m4 (_AC_COMPILER_EXEEXT): Remove b.out files.
+       (_AC_COMPILER_EXEEXT_DEFAULT): Adjust to b.out.
+
 2002-09-13  Paul Eggert  <eggert@twinsun.com>
 
        * doc/autoconf.texi (Particular Headers): Remove obsolete

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 65de572160f6f703585531bf11e5ae9cb369f786..78602f868f34e9fb53a91dc32b03e3f98b9ce33e 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -9846,6 +9846,7 @@ The default executable, produced by @samp{cc foo.c}, can be
 
 @itemize
 @item @file{a.out} --- usual Unix convention.
+@item @file{b.out} --- i960 compilers (including @command{gcc}).
 @item @file{a.exe} --- DJGPP port of @command{gcc}.
 @item @file{a_out.exe} --- GNV @command{cc} wrapper for DEC C on OpenVMS.
 @item @file{foo.exe} --- various MS-DOS compilers.

diff --git a/lib/autoconf/lang.m4 b/lib/autoconf/lang.m4
index f62e323641fcb8b95c354c1a629c824b1bbf3334..75fdbb837995a94c4d3057d17e4cdd82842a5c9f 100644 (file)
--- a/lib/autoconf/lang.m4
+++ b/lib/autoconf/lang.m4
@@ -426,6 +426,10 @@ AC_DEFUN([AC_OBJEXT],   [])
 # _AC_COMPILER_EXEEXT_DEFAULT
 # ---------------------------
 # Check for the extension used for the default name for executables.
+#
+# We do this in order to find out what is the extension we must for
+# compiling executables (see _AC_COMPILER_EXEEXT's comments).
+#
 # Beware of `expr' that may return `0' or `'.  Since this macro is
 # the first one in touch with the compiler, it should also check that
 # it compiles properly.
@@ -447,18 +451,29 @@ AS_IF([AC_TRY_EVAL(ac_link_default)],
 # Be careful to initialize this variable, since it used to be cached.
 # Otherwise an old cache value of `no' led to `EXEEXT = no' in a Makefile.
 ac_cv_exeext=
-for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.*; do
+# b.out is created by i960 compilers.
+for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.* b.out
+do
   test -f "$ac_file" || continue
   case $ac_file in
-    _AC_COMPILER_EXEEXT_REJECT ) ;;
-    a.out ) # We found the default executable, but exeext='' is most
-            # certainly right.
-            break;;
-    *.* ) ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
-          # FIXME: I believe we export ac_cv_exeext for Libtool --akim.
-          export ac_cv_exeext
-          break;;
-    * ) break;;
+    _AC_COMPILER_EXEEXT_REJECT )
+        ;;
+    conftest.$ac_ext )
+        # This is the source file.
+        ;;
+    [[ab]].out )
+        # We found the default executable, but exeext='' is most
+        # certainly right.
+        break;;
+    *.* )
+        ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
+        # FIXME: I believe we export ac_cv_exeext for Libtool,
+        # but it would be cool to find out if it's true.  Does anybody
+        # maintain Libtool? --akim.
+        export ac_cv_exeext
+        break;;
+    * )
+        break;;
   esac
 done],
       [echo "$as_me: failed program was:" >&AS_MESSAGE_LOG_FD
@@ -546,10 +561,10 @@ AC_MSG_RESULT([$ac_cv_exeext])
 m4_define([_AC_COMPILER_EXEEXT],
 [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
 ac_clean_files_save=$ac_clean_files
-ac_clean_files="$ac_clean_files a.out a.exe"
+ac_clean_files="$ac_clean_files a.out a.exe b.out"
 _AC_COMPILER_EXEEXT_DEFAULT
 _AC_COMPILER_EXEEXT_WORKS
-rm -f a.out a.exe conftest$ac_cv_exeext
+rm -f a.out a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
 _AC_COMPILER_EXEEXT_CROSS
 _AC_COMPILER_EXEEXT_O