autoconf 2.59 - errors in configure script

[Anthon]

------------------
Software
------------------

OS: GNU Linux (Red Hat 8)
m4: 1.4.2
libtool: 1.5.8
automake: 1.9.1
autoconf: 2.59

------------------
Problem
------------------

./configure-broken: line 4047: syntax error near unexpected token `newline'
./configure-broken: line 4047: `  yes:no:'

------------------
Observations
------------------

There are a couple problems with the configure script generated by this (latest)
software combination:

1) "fi" and ")" are swapped in a couple of places
2) there is a nested "cat >>conftest.$ac_ext <<_ACEOF"..."_ACEOF" block

[The complete configure script is available on request.]

------------------
Steps to Reproduce
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1) aclocal
2) autoconf
3) ./configure

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File: configure.in
------------------

dnl Process this file with autoconf to produce a configure script.
AC_INIT

dnl Set initial values
AC_PREFIX_DEFAULT(/usr/local/example)

dnl Checks for programs.
AC_PROG_INSTALL
AC_PROG_YACC
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_PROG_LEX

dnl Checks for header files.
AC_HEADER_STDC

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE

dnl Checks for library functions.
AC_CHECK_FUNCS(strdup)

THREAD_LIBS=
AC_CHECK_LIB(pthread, pthread_create,
  AC_CHECK_HEADERS(pthread.h, [
    CFLAGS="$CFLAGS -D_REENTRANT"
    THREAD_LIBS="$THREAD_LIBS -lpthread"])
)
AC_SUBST(THREAD_LIBS)

------------------
configure (diffs between generated and manually tweaked files)
------------------

--- configure-broken    2004-09-12 02:31:36.000000000 -0400
+++ configure   2004-09-12 02:35:27.000000000 -0400
@@ -3862,6 +3862,7 @@
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
+_ACEOF
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stdio.h>
@@ -3901,6 +3902,12 @@

 # On IRIX 5.3, sys/types and inttypes.h are conflicting.

+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+
+#include <$ac_header>
+_ACEOF



@@ -3971,9 +3978,6 @@
 done


-$ac_includes_default
-#include <$ac_header>
-_ACEOF
 rm -f conftest.$ac_objext
 if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>conftest.er1
@@ -4049,8 +4053,7 @@

 # So?  What about this header?
 case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
-  yes:no:
-fi
+  yes:no: )

     { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler,
rejected by
the preprocessor!" >&5
 echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the
preprocessor!" >&2;}
@@ -4103,5 +4106,5 @@

 done

-)
+fi