Add mention of config.log for configure failure debugging.

configure

@@ -3020,11 +3020,6 @@ if test "${with_java+set}" = set; then
     yes)
       echo "$as_me:$LINENO: result: yes" >&5
 echo "${ECHO_T}yes" >&6
-if test ! "$JAVA_HOME" -o ! -d "$JAVA_HOME" ; then
-  { { echo "$as_me:$LINENO: error: Set the JAVA_HOME environment variable to build Java components" >&5
-echo "$as_me: error: Set the JAVA_HOME environment variable to build Java components" >&2;}
-   { (exit 1); exit 1; }; }
-fi
 
   for ac_prog in jakarta-ant ant ant.sh ant.bat
 do
@@ -3125,8 +3120,10 @@ echo "$as_me: error: ant does not work" >&2;}
 
 
 if test -z "$ANT"; then
-  { { echo "$as_me:$LINENO: error: Ant is required to build Java components" >&5
-echo "$as_me: error: Ant is required to build Java components" >&2;}
+  { { echo "$as_me:$LINENO: error: Ant is required to build Java components
+If you have Ant already installed, see config.log for details on the failure." >&5
+echo "$as_me: error: Ant is required to build Java components
+If you have Ant already installed, see config.log for details on the failure." >&2;}
    { (exit 1); exit 1; }; }
 fi
 if "$ANT" -version | sed q | egrep -v ' 1\.[5-9]| [2-9]\.' >/dev/null ; then
@@ -5841,8 +5838,12 @@ echo "${ECHO_T}no" >&6
 fi
   if test x"$pgac_cv_check_readline" = x"no"; then
     { { echo "$as_me:$LINENO: error: readline library not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&5
 echo "$as_me: error: readline library not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&2;}
    { (exit 1); exit 1; }; }
   fi
@@ -5914,8 +5915,12 @@ _ACEOF
 
 else
   { { echo "$as_me:$LINENO: error: zlib library not found
+If you have zlib already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support." >&5
 echo "$as_me: error: zlib library not found
+If you have zlib already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support." >&2;}
    { (exit 1); exit 1; }; }
 fi
@@ -7341,8 +7346,12 @@ _ACEOF
 
 else
   { { echo "$as_me:$LINENO: error: readline header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&5
 echo "$as_me: error: readline header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&2;}
    { (exit 1); exit 1; }; }
 fi
@@ -7576,8 +7585,12 @@ _ACEOF
 
 else
   { { echo "$as_me:$LINENO: error: history header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&5
 echo "$as_me: error: history header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support." >&2;}
    { (exit 1); exit 1; }; }
 fi
@@ -7696,8 +7709,12 @@ if test $ac_cv_header_zlib_h = yes; then
   :
 else
   { { echo "$as_me:$LINENO: error: zlib header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support." >&5
 echo "$as_me: error: zlib header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support." >&2;}
    { (exit 1); exit 1; }; }
 fi

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $Header: /cvsroot/pgsql/configure.in,v 1.207 2002/09/06 14:31:16 momjian Exp $
+dnl $Header: /cvsroot/pgsql/configure.in,v 1.208 2002/09/11 04:27:48 momjian Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -371,12 +371,10 @@ AC_SUBST(with_python)
 AC_MSG_CHECKING([whether to build Java/JDBC tools])
 PGAC_ARG_BOOL(with, java, no, [  --with-java             build JDBC interface and Java tools],
 [AC_MSG_RESULT(yes)
-if test ! "$JAVA_HOME" -o ! -d "$JAVA_HOME" ; then
-  AC_MSG_ERROR([Set the JAVA_HOME environment variable to build Java components])
-fi
 PGAC_PATH_ANT
 if test -z "$ANT"; then
-  AC_MSG_ERROR([Ant is required to build Java components])
+  AC_MSG_ERROR([Ant is required to build Java components
+If you have Ant already installed, see config.log for details on the failure.])
 fi
 if "$ANT" -version | sed q | egrep -v ' 1\.[[5-9]]| [[2-9]]\.' >/dev/null ; then
   AC_MSG_ERROR([Ant version >= 1.5 is required to build Java components])
@@ -624,6 +622,8 @@ if test "$with_readline" = yes; then
   PGAC_CHECK_READLINE
   if test x"$pgac_cv_check_readline" = x"no"; then
     AC_MSG_ERROR([readline library not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support.])
   fi
 fi
@@ -631,6 +631,8 @@ fi
 if test "$with_zlib" = yes; then
   AC_CHECK_LIB(z, inflate, [],
                [AC_MSG_ERROR([zlib library not found
+If you have zlib already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support.])])
 fi
 
@@ -680,15 +682,21 @@ if test "$with_readline" = yes; then
   AC_CHECK_HEADERS([readline/readline.h], [],
                    [AC_CHECK_HEADERS([readline.h], [],
                                      [AC_MSG_ERROR([readline header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support.])])])
   AC_CHECK_HEADERS([readline/history.h], [],
                    [AC_CHECK_HEADERS([history.h], [],
                                      [AC_MSG_ERROR([history header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-readline to disable readline support.])])])
 fi
 
 if test "$with_zlib" = yes; then
   AC_CHECK_HEADER(zlib.h, [], [AC_MSG_ERROR([zlib header not found
+If you have readline already installed, see config.log for details on the
+failure.  It is possible the compiler isn't looking in the proper directory.
 Use --without-zlib to disable zlib support.])])
 fi