don't display the --with-imap message unless --with-imap was specified without a path

use '-n' instead of '! -z' for tests


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@53850 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 72 insertions, 70 deletions

diff --git a/configure b/configure
index 504f9767e..7da38807e 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 52997 .
+# From configure.ac Revision: 53715 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61.
 #
@@ -16169,7 +16169,7 @@ fi
 	 fi
       fi
       if test "x${ALSA_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${ALSA_MANDATORY}" ;
+         if test -n "${ALSA_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -16192,7 +16192,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${ALSA_MANDATORY}";
+   elif test -n "${ALSA_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -16568,7 +16568,7 @@ fi
 	 fi
       fi
       if test "x${CURSES_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${CURSES_MANDATORY}" ;
+         if test -n "${CURSES_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -16591,7 +16591,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${CURSES_MANDATORY}";
+   elif test -n "${CURSES_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -17646,7 +17646,7 @@ fi
 	 fi
       fi
       if test "x${IKSEMEL_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${IKSEMEL_MANDATORY}" ;
+         if test -n "${IKSEMEL_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -17669,7 +17669,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${IKSEMEL_MANDATORY}";
+   elif test -n "${IKSEMEL_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -18046,7 +18046,7 @@ fi
 	 fi
       fi
       if test "x${GNUTLS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${GNUTLS_MANDATORY}" ;
+         if test -n "${GNUTLS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -18069,7 +18069,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${GNUTLS_MANDATORY}";
+   elif test -n "${GNUTLS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -18091,14 +18091,16 @@ fi
 if test "${USE_IMAP_TK}" != "no"; then
    if test "${IMAP_TK_DIR}" = ""; then
       IMAP_TK_DIR=`pwd`"/../imap-2004g"
-      { echo "$as_me:$LINENO: The --with-imap option does not search your system for installed" >&5
+      if test  -n "${IMAP_TK_MANDATORY}"; then
+	 { echo "$as_me:$LINENO: The --with-imap option does not search your system for installed" >&5
 echo "$as_me: The --with-imap option does not search your system for installed" >&6;}
-      { echo "$as_me:$LINENO: c-client library/header files. Since you did not provide a path" >&5
+	 { echo "$as_me:$LINENO: c-client library/header files. Since you did not provide a path" >&5
 echo "$as_me: c-client library/header files. Since you did not provide a path" >&6;}
-      { echo "$as_me:$LINENO: the configure script will assume you have placed built the c-client" >&5
+	 { echo "$as_me:$LINENO: the configure script will assume you have placed built the c-client" >&5
 echo "$as_me: the configure script will assume you have placed built the c-client" >&6;}
-      { echo "$as_me:$LINENO: files at ${IMAP_TK_DIR}, as outlined in the doc/imapstorage.txt file." >&5
+	 { echo "$as_me:$LINENO: files at ${IMAP_TK_DIR}, as outlined in the doc/imapstorage.txt file." >&5
 echo "$as_me: files at ${IMAP_TK_DIR}, as outlined in the doc/imapstorage.txt file." >&6;}
+      fi
    fi
    { echo "$as_me:$LINENO: checking for UW IMAP Toolkit c-client library" >&5
 echo $ECHO_N "checking for UW IMAP Toolkit c-client library... $ECHO_C" >&6; }
@@ -18315,7 +18317,7 @@ cat >>confdefs.h <<\_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${IMAP_TK_MANDATORY}"; then
+   elif test -n "${IMAP_TK_MANDATORY}"; then
       { echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6; }
       { echo "$as_me:$LINENO: ***" >&5
@@ -18416,7 +18418,7 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_LIBKDE 1
 _ACEOF
 
-   elif test ! -z "${KDE_MANDATORY}"; then
+   elif test -n "${KDE_MANDATORY}"; then
       { echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6; }
       { echo "$as_me:$LINENO: ***" >&5
@@ -18911,7 +18913,7 @@ fi
 	 fi
       fi
       if test "x${MISDN_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${MISDN_MANDATORY}" ;
+         if test -n "${MISDN_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -18934,7 +18936,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${MISDN_MANDATORY}";
+   elif test -n "${MISDN_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -19311,7 +19313,7 @@ fi
 	 fi
       fi
       if test "x${ISDNNET_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${ISDNNET_MANDATORY}" ;
+         if test -n "${ISDNNET_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -19334,7 +19336,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${ISDNNET_MANDATORY}";
+   elif test -n "${ISDNNET_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -19709,7 +19711,7 @@ fi
 	 fi
       fi
       if test "x${SUPPSERV_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${SUPPSERV_MANDATORY}" ;
+         if test -n "${SUPPSERV_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -19732,7 +19734,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${SUPPSERV_MANDATORY}";
+   elif test -n "${SUPPSERV_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20109,7 +20111,7 @@ fi
 	 fi
       fi
       if test "x${NBS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${NBS_MANDATORY}" ;
+         if test -n "${NBS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20132,7 +20134,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${NBS_MANDATORY}";
+   elif test -n "${NBS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20508,7 +20510,7 @@ fi
 	 fi
       fi
       if test "x${NCURSES_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${NCURSES_MANDATORY}" ;
+         if test -n "${NCURSES_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20531,7 +20533,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${NCURSES_MANDATORY}";
+   elif test -n "${NCURSES_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20845,7 +20847,7 @@ fi
    if test "${ac_cv_lib_netsnmp_snmp_register_callback}" = "yes"; then
       NETSNMP_LIB="${NETSNMP_libs}"
       PBX_NETSNMP=1
-   elif test ! -z "${NETSNMP_MANDATORY}";
+   elif test -n "${NETSNMP_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -20857,7 +20859,7 @@ echo "$as_me: *** Either correct the installation, or run configure" >&6;}
 echo "$as_me: *** including --without-netsnmp" >&6;}
       exit 1
    fi
-elif test ! -z "${NETSNMP_MANDATORY}";
+elif test -n "${NETSNMP_MANDATORY}";
 then
    { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -21231,7 +21233,7 @@ fi
 	 fi
       fi
       if test "x${NEWT_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${NEWT_MANDATORY}" ;
+         if test -n "${NEWT_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -21254,7 +21256,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${NEWT_MANDATORY}";
+   elif test -n "${NEWT_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -21630,7 +21632,7 @@ fi
 	 fi
       fi
       if test "x${UNIXODBC_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${UNIXODBC_MANDATORY}" ;
+         if test -n "${UNIXODBC_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -21653,7 +21655,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${UNIXODBC_MANDATORY}";
+   elif test -n "${UNIXODBC_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -22029,7 +22031,7 @@ fi
 	 fi
       fi
       if test "x${OGG_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${OGG_MANDATORY}" ;
+         if test -n "${OGG_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -22052,7 +22054,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${OGG_MANDATORY}";
+   elif test -n "${OGG_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -22428,7 +22430,7 @@ fi
 	 fi
       fi
       if test "x${OSPTK_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${OSPTK_MANDATORY}" ;
+         if test -n "${OSPTK_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -22451,7 +22453,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${OSPTK_MANDATORY}";
+   elif test -n "${OSPTK_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23105,7 +23107,7 @@ fi
 	 fi
       fi
       if test "x${OSS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${OSS_MANDATORY}" ;
+         if test -n "${OSS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23128,7 +23130,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${OSS_MANDATORY}";
+   elif test -n "${OSS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23445,7 +23447,7 @@ fi
       PGSQL_LIB="-L${PGSQL_libdir} -lpq -lz"
       PGSQL_INCLUDE="-I${PGSQL_includedir}"
       PBX_PGSQL=1
-   elif test ! -z "${PGSQL_MANDATORY}";
+   elif test -n "${PGSQL_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23457,7 +23459,7 @@ echo "$as_me: *** Either correct the installation, or run configure" >&6;}
 echo "$as_me: *** including --without-postgres" >&6;}
       exit 1
    fi
-elif test ! -z "${PGSQL_MANDATORY}";
+elif test -n "${PGSQL_MANDATORY}";
 then
    { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23831,7 +23833,7 @@ fi
 	 fi
       fi
       if test "x${POPT_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${POPT_MANDATORY}" ;
+         if test -n "${POPT_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -23854,7 +23856,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${POPT_MANDATORY}";
+   elif test -n "${POPT_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -24230,7 +24232,7 @@ fi
 	 fi
       fi
       if test "x${PRI_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${PRI_MANDATORY}" ;
+         if test -n "${PRI_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -24253,7 +24255,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${PRI_MANDATORY}";
+   elif test -n "${PRI_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -24269,7 +24271,7 @@ fi
 
 
 if test "${USE_PWLIB}" != "no"; then
-	if test ! -z "${PWLIB_DIR}"; then
+	if test -n "${PWLIB_DIR}"; then
 		PWLIBDIR="${PWLIB_DIR}"
 	fi
 
@@ -24813,7 +24815,7 @@ _ACEOF
 	fi
 fi
 
-if test "${USE_PWLIB}" != "no" -a "x${ac_cv_lib_PWLIB}" != "xyes" -a ! -z "${PWLIB_MANDATORY}"; then
+if test "${USE_PWLIB}" != "no" -a "x${ac_cv_lib_PWLIB}" != "xyes" -a -n "${PWLIB_MANDATORY}"; then
    { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
    { echo "$as_me:$LINENO: *** The PWLIB installation on this system appears to be broken." >&5
@@ -24826,7 +24828,7 @@ echo "$as_me: *** including --without-pwlib" >&6;}
 fi
 
 if test "${PBX_PWLIB}" = "1" -a "${USE_OPENH323}" != "no" ; then
-	if test ! -z "${OPENH323_DIR}"; then
+	if test -n "${OPENH323_DIR}"; then
 		OPENH323DIR="${OPENH323_DIR}"
 	fi
 
@@ -25200,7 +25202,7 @@ _ACEOF
 	fi
 
 fi
-if test "${USE_OPENH323}" != "no" -a "x${ac_cv_lib_OPENH323}" != "xyes" -a ! -z "${OPENH323_MANDATORY}"; then
+if test "${USE_OPENH323}" != "no" -a "x${ac_cv_lib_OPENH323}" != "xyes" -a -n "${OPENH323_MANDATORY}"; then
    { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
    { echo "$as_me:$LINENO: *** The OPENH323 installation on this system appears to be broken." >&5
@@ -25459,7 +25461,7 @@ else
   QTMOC="$ac_cv_path_QTMOC"
 fi
 
-   elif test ! -z "${QT_MANDATORY}";
+   elif test -n "${QT_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -25841,7 +25843,7 @@ fi
 	 fi
       fi
       if test "x${RADIUS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${RADIUS_MANDATORY}" ;
+         if test -n "${RADIUS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -25864,7 +25866,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${RADIUS_MANDATORY}";
+   elif test -n "${RADIUS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -26240,7 +26242,7 @@ fi
 	 fi
       fi
       if test "x${SPEEX_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${SPEEX_MANDATORY}" ;
+         if test -n "${SPEEX_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -26263,7 +26265,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${SPEEX_MANDATORY}";
+   elif test -n "${SPEEX_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -26639,7 +26641,7 @@ fi
 	 fi
       fi
       if test "x${SQLITE_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${SQLITE_MANDATORY}" ;
+         if test -n "${SQLITE_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -26662,7 +26664,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${SQLITE_MANDATORY}";
+   elif test -n "${SQLITE_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27038,7 +27040,7 @@ fi
 	 fi
       fi
       if test "x${OPENSSL_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${OPENSSL_MANDATORY}" ;
+         if test -n "${OPENSSL_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27061,7 +27063,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${OPENSSL_MANDATORY}";
+   elif test -n "${OPENSSL_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27437,7 +27439,7 @@ fi
 	 fi
       fi
       if test "x${FREETDS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${FREETDS_MANDATORY}" ;
+         if test -n "${FREETDS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27460,7 +27462,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${FREETDS_MANDATORY}";
+   elif test -n "${FREETDS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27853,7 +27855,7 @@ fi
 	 fi
       fi
       if test "x${TERMCAP_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${TERMCAP_MANDATORY}" ;
+         if test -n "${TERMCAP_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -27876,7 +27878,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${TERMCAP_MANDATORY}";
+   elif test -n "${TERMCAP_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -28252,7 +28254,7 @@ fi
 	 fi
       fi
       if test "x${TINFO_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${TINFO_MANDATORY}" ;
+         if test -n "${TINFO_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -28275,7 +28277,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${TINFO_MANDATORY}";
+   elif test -n "${TINFO_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -28655,7 +28657,7 @@ fi
 	 fi
       fi
       if test "x${TONEZONE_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${TONEZONE_MANDATORY}" ;
+         if test -n "${TONEZONE_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -28678,7 +28680,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${TONEZONE_MANDATORY}";
+   elif test -n "${TONEZONE_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -29054,7 +29056,7 @@ fi
 	 fi
       fi
       if test "x${VORBIS_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${VORBIS_MANDATORY}" ;
+         if test -n "${VORBIS_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -29077,7 +29079,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${VORBIS_MANDATORY}";
+   elif test -n "${VORBIS_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -29180,7 +29182,7 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_VPB 1
 _ACEOF
 
-   elif test ! -z "${VPB_MANDATORY}"; then
+   elif test -n "${VPB_MANDATORY}"; then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
       { echo "$as_me:$LINENO: *** The VoiceTronix (vpb) installation on this system appears to be broken." >&5
@@ -29561,7 +29563,7 @@ fi
 	 fi
       fi
       if test "x${ZLIB_HEADER_FOUND}" = "x0" ; then
-         if test ! -z "${ZLIB_MANDATORY}" ;
+         if test -n "${ZLIB_MANDATORY}" ;
          then
             { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -29584,7 +29586,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
       fi
-   elif test ! -z "${ZLIB_MANDATORY}";
+   elif test -n "${ZLIB_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}
@@ -29667,7 +29669,7 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_ZAPTEL 1
 _ACEOF
 
-   elif test ! -z "${ZAPTEL_MANDATORY}";
+   elif test -n "${ZAPTEL_MANDATORY}";
    then
       { echo "$as_me:$LINENO: ***" >&5
 echo "$as_me: ***" >&6;}