Suggest CMake if Qt not found on Darwin; say "not installed for development".

Hopefully this will allow more people to figure out how to compile
Wireshark without 1) e-mailing wireshark-dev, 2) asking in
ask.wireshark.com, or 3) filing a bug, if the underlying problem is that

	1) they didn't install the appropriate xyzzy-dev package for
	   something Wireshark uses

or

	2) they're trying to use autotools on macOS and they've
	   installed a recent, and not-very-pkg-config-friendly, version
	   of Qt.

Change-Id: I69236558f207ed0bf81d2acdc0230630f6069dec
Reviewed-on: https://code.wireshark.org/review/23963
Reviewed-by: Guy Harris <guy@alum.mit.edu>

diff --git a/configure.ac b/configure.ac
index d4baf7093cf91290fe6517dc6aa3e2c625968db0..812a72a624e717ac301e2e0a42a5f1830db0079a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -291,7 +291,7 @@ if test "x$with_gnutls" = "xyes"; then
 
   if test "x$have_license_compatible_gnutls" != "xyes"; then
     if test "x$want_gnutls" = "xyes"; then
-      AC_MSG_ERROR([GnuTLS crypto library was requested, but is not available])
+      AC_MSG_ERROR([GnuTLS crypto library was requested, but is not installed for development])
     else
       AS_ECHO(["GnuTLS with compatible license not found, disabling SSL decryption"])
     fi
@@ -1236,15 +1236,63 @@ if test "x$enable_wireshark" = "xyes"; then
                                ;;
 
                        yes)
-                               AC_MSG_ERROR([Qt is not available])
+                               case "$host_os" in
+                               darwin*)
+                                       #
+                                       # This is probably macOS, and the
+                                       # problem could be that this is a
+                                       # later version of Qt that doesn't
+                                       # install .pc files on macOS, so
+                                       # pkg-config can't find it.
+                                       #
+                                       AC_MSG_ERROR([Qt is not installed or may not work with the configure script; try using CMake, instead])
+                                       ;;
+
+                               *)
+                                       #
+                                       # Qt might be installed, but only
+                                       # for use by applications, not
+                                       # for development.
+                                       #
+                                       AC_MSG_ERROR([Qt is not installed for development])
+                                       ;;
+                               esac
                                ;;
 
                        4)
-                               AC_MSG_ERROR([Qt 4 is not available])
+                               case "$host_os" in
+                               darwin*)
+                                       #
+                                       # See above.
+                                       #
+                                       AC_MSG_ERROR([Qt 4 is not installed or may not work with the configure script; try using CMake, instead])
+                                       ;;
+
+                               *)
+                                       #
+                                       # See above.
+                                       #
+                                       AC_MSG_ERROR([Qt 4 is not installed for development])
+                                       ;;
+                               esac
                                ;;
 
                        5)
-                               AC_MSG_ERROR([Qt 5 is not available])
+                               case "$host_os" in
+                               darwin*)
+                                       #
+                                       # See above.
+                                       #
+                                       AC_MSG_ERROR([Qt 5 is not installed or may not work with the configure script; try using CMake, instead])
+                                       ;;
+
+                               *)
+                                       #
+                                       # See above.
+                                       #
+                                       AC_MSG_ERROR([Qt 5 is not installed for development])
+                                       ;;
+                               esac
                                ;;
                        esac
                ])
@@ -1272,9 +1320,9 @@ if test "x$enable_wireshark" = "xyes"; then
                        [
                          :
                        ])],
-                 [fail3], [AC_MSG_ERROR([GTK+ 3 was requested but is not available])],
-                 [fail2], [AC_MSG_ERROR([GTK+ 2 was requested but is not available])],
-                 [fail],  [AC_MSG_ERROR([GTK+ was requested but is not available])])
+                 [fail3], [AC_MSG_ERROR([GTK+ 3 was requested but is not installed for development])],
+                 [fail2], [AC_MSG_ERROR([GTK+ 2 was requested but is not installed for development])],
+                 [fail],  [AC_MSG_ERROR([GTK+ was requested but is not installed for development])])
 
                AS_IF([test "x$have_gtk" = xyes], [break])
        done
@@ -1356,11 +1404,51 @@ elif test "$have_gtk" = "no" -a "$have_qt" = "no" ; then
        #
        if test "x$enable_wireshark" = "xyes"; then
                if test "$with_qt" != "no" -a "$with_gtk" != "no" ; then
-                       AC_MSG_ERROR([Neither Qt nor GTK+ are available, so Wireshark can't be compiled])
+                       case "$host_os" in
+                       darwin*)
+                               #
+                               # This is probably macOS, and the
+                               # problem could be that this is a
+                               # later version of Qt that doesn't
+                               # install .pc files on macOS, so
+                               # pkg-config can't find it.
+                               #
+                               AC_MSG_ERROR([Neither Qt nor GTK+ are installed for development, or Qt is installed but doesn't work with the configure script, so Wireshark can't be compiled; try using CMake, instead])
+                               ;;
+
+                       *)
+                               #
+                               # Qt might be installed, but only
+                               # for use by applications, not
+                               # for development.
+                               #
+                               AC_MSG_ERROR([Neither Qt nor GTK+ are installed for development, so Wireshark can't be compiled])
+                               ;;
+                       esac
                elif test "$with_qt" != "no" -a "$with_gtk" = "no" ; then
-                       AC_MSG_ERROR([Qt is not available and GTK+ was not requested, so Wireshark can't be compiled])
+                       case "$host_os" in
+                       darwin*)
+                               #
+                               # This is probably macOS, and the
+                               # problem could be that this is a
+                               # later version of Qt that doesn't
+                               # install .pc files on macOS, so
+                               # pkg-config can't find it.
+                               #
+                               AC_MSG_ERROR([Qt is not installed or may not work with the configure script, and GTK+ was not requested, so Wireshark cannot be compiled; try using CMake, instead])
+                               ;;
+
+                       *)
+                               #
+                               # Qt might be installed, but only
+                               # for use by applications, not
+                               # for development.
+                               #
+                               AC_MSG_ERROR([Qt is not installed for development and GTK+ was not requested, so Wireshark can't be compiled])
+                               ;;
+                       esac
                elif test "$with_qt" = "no" -a "$with_gtk" != "no" ; then
-                       AC_MSG_ERROR([Qt was not requested and GTK+ is not available, so Wireshark can't be compiled])
+                       AC_MSG_ERROR([Qt was not requested and GTK+ is not installed for development, so Wireshark can't be compiled])
                elif test "$with_qt" = "no" -a "$with_gtk" = "no" ; then
                        AC_MSG_ERROR([Neither Qt nor GTK+ were requested, so Wireshark can't be compiled])
                fi
@@ -1677,7 +1765,7 @@ AC_ARG_ENABLE(dumpcap,
 if test "x$enable_dumpcap" = "xyes" ; then
        if test "x$want_pcap" = "xno" ; then
                enable_dumpcap=no
-               AC_MSG_RESULT(pcap not available - disabling dumpcap)
+               AC_MSG_RESULT(pcap not installed for development - disabling dumpcap)
        else
                AC_MSG_RESULT(yes)
        fi
@@ -1708,7 +1796,7 @@ AC_ARG_ENABLE(rawshark,
 if test "x$enable_rawshark" = "xyes" ; then
        if test "x$want_pcap" = "xno" ; then
                enable_rawshark=no
-               AC_MSG_RESULT(pcap not available - disabling rawshark)
+               AC_MSG_RESULT(pcap not installed for development - disabling rawshark)
        else
                AC_MSG_RESULT(yes)
        fi
@@ -1938,7 +2026,7 @@ if test "x$want_lua" != "xno" ; then
 
        if test "x$want_lua" = "xyes" -a "x$have_lua" = "xno"
        then
-               AC_MSG_ERROR([Lua support was requested, but is not available])
+               AC_MSG_ERROR([Lua support was requested, but is not installed for development])
        fi
 fi
 if test "x$have_lua" = "xyes"
@@ -2137,7 +2225,7 @@ if test "x$want_ssl" = "xyes"; then
                SSL_LIBS=-lcrypto
            ],
            [
-               AC_MSG_ERROR([SSL crypto library was requested, but is not available])
+               AC_MSG_ERROR([SSL crypto library was requested, but is not installed for development])
            ])
 else
        AC_MSG_RESULT(no)
@@ -2386,7 +2474,7 @@ if test "x$with_sbc" != "xno"; then
        AC_DEFINE(HAVE_SBC, 1, [Define to support playing SBC by standalone BlueZ SBC library])
     elif test "x$want_sbc" = "xyes"; then
        # Error out if the user explicitly requested the sbc library
-       AC_MSG_ERROR([SBC codec library was requested, but is not available])
+       AC_MSG_ERROR([SBC codec library was requested, but is not installed for development])
     fi
 else
     have_sbc=no
@@ -2407,7 +2495,7 @@ if test "x$with_spandsp" != "xno"; then
         AC_DEFINE(HAVE_SPANDSP, 1, [Define if you have the SpanDSP library])
     elif test "x$want_spandsp" = "xyes"; then
         # Error out if the user explicitly requested the SpanDSP library
-        AC_MSG_ERROR([SpanDSP library was requested, but is not available])
+        AC_MSG_ERROR([SpanDSP library was requested, but is not installed for development])
     fi
 else
     have_spandsp=no
@@ -2456,7 +2544,7 @@ if test "x$with_libxml2" != "xno"; then
         AC_DEFINE(HAVE_LIBXML2, 1, [Define if you have libxml2])
     elif test "x$want_libxml2" = "xyes"; then
         # Error out if the user explicitly requested libxml2
-        AC_MSG_ERROR([Libxml2 was requested, but is not available])
+        AC_MSG_ERROR([Libxml2 was requested, but is not installed for development])
     fi
 else
     have_libxml2=no
@@ -2579,7 +2667,7 @@ if test "x$have_extcap" != xyes; then
        AC_MSG_RESULT([no, extcap disabled])
        enable_sshdump=no
 elif test "x$have_libssh_pointsix" != xyes; then
-       AC_MSG_RESULT([no, libssh >= 0.6.0 not available])
+       AC_MSG_RESULT([no, libssh >= 0.6.0 not installed for development])
        enable_sshdump=no
 elif test "x$enable_sshdump" = "xyes" ; then
        AC_MSG_RESULT(yes)
@@ -2609,7 +2697,7 @@ if test "x$have_extcap" != xyes; then
        AC_MSG_RESULT([no, extcap disabled])
        enable_ciscodump=no
 elif test "x$have_libssh_pointsix" != xyes; then
-       AC_MSG_RESULT([no, libssh >= 0.6.0 not available])
+       AC_MSG_RESULT([no, libssh >= 0.6.0 not installed for development])
        enable_ciscodump=no
 elif test "x$enable_ciscodump" = "xyes" ; then
        AC_MSG_RESULT(yes)