From 268b1a599304f58bd56c86ff09041b5912c24a0c Mon Sep 17 00:00:00 2001
From: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Date: Sun, 1 Nov 2020 17:24:36 +0100
Subject: [PATCH] gr-qtgui: dont't add examples/c++ subdirectory when gr-analog
 is disabled

gr-qtgui examples needs to have gr-analog enabled, without this dependency
compile crash with:

In file included from
/x/output/build/gnuradio-3.8.1.0/gr-qtgui/examples/c++/display_qt.cc:22:
/x/output/build/gnuradio-3.8.1.0/gr-qtgui/examples/c++/display_qt.h:24:10:
fatal error: gnuradio/analog/noise_source.h: No such file or directory
24 | #include <gnuradio/analog/noise_source.h>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [gr-qtgui/examples/c++/CMakeFiles/display_qt.dir/build.make:67:
gr-qtgui/examples/c++/CMakeFiles/display_qt.dir/display_qt.cc.o] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from
/somewhere/gnuradio/build/gr-qtgui/examples/c++/moc_display_qt.cpp:10:
/somewhere/gnuradio/build/gr-qtgui/examples/c++/../../../../gr-qtgui/examples/c++/display_qt.h:24:10:
fatal error: gnuradio/analog/noise_source.h: No such file or directory
24 | #include <gnuradio/analog/noise_source.h>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

GR_ANALOG is not an explicit dependency of GR_QTGUI, so disable c++ examples if
user has not selected this option.

[backported from 7470a7a3771dd90defb826b464dfe62977cb1eb6]

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
---
 gr-qtgui/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gr-qtgui/CMakeLists.txt b/gr-qtgui/CMakeLists.txt
index 8831f3ad9..561186fbd 100644
--- a/gr-qtgui/CMakeLists.txt
+++ b/gr-qtgui/CMakeLists.txt
@@ -68,7 +68,9 @@ if(ENABLE_GR_QTGUI)
 add_subdirectory(include/gnuradio/qtgui)
 add_subdirectory(lib)
 add_subdirectory(docs)
-add_subdirectory(examples/c++)
+if (ENABLE_GR_ANALOG)
+	add_subdirectory(examples/c++)
+endif(ENABLE_GR_ANALOG)
 if(ENABLE_PYTHON)
     add_subdirectory(swig)
     add_subdirectory(python/qtgui)
-- 
2.26.2