[gparted] Initialise Glib threading system in test_PipeCapture (#777973)

[Curtis Gedak <gedakc src gnome org>]

commit d90702d52608d84ef5c68d66d0c92a3438253ab7
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Sat May 20 18:51:50 2017 +0100

    Initialise Glib threading system in test_PipeCapture (#777973)
    
    On CentOS 6, with glib/glibmm 2.28, running the tests fails thus:
    
        $ ./test_PipeCapture
        Running main() from gtest_main.cc
        [==========] Running 4 tests from 1 test case.
        [----------] Global test environment set-up.
        [----------] 4 tests from PipeCaptureTest
        [ RUN      ] PipeCaptureTest.EmptyPipe
    
        GLib-ERROR **: The thread system is not yet initialized.
        aborting...
        Aborted (core dumped)
    
    For glib before version 2.32, the threading system must be explicitly
    initialised with a call to g_thread_init(), or the Glibmm
    Glib::thread_init() equivalent to prevent this error.
    
        Deprecated thread API, g_thread_init()
        https://developer.gnome.org/glib/stable/glib-Deprecated-Thread-APIs.html#g-thread-init
    
    Do this by providing our own main() which also initialises the Glib
    threading system, rather using and linking in the Google Test provided
    main().
    
    Bug 777973 - Segmentation fault on bad disk

 tests/Makefile.am         |    1 +
 tests/test_PipeCapture.cc |   17 +++++++++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8fb91f3..84d3744 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -21,3 +21,4 @@ TESTS = $(check_PROGRAMS)
 test_dummy_SOURCES        = test_dummy.cc
 test_BlockSpecial_SOURCES = test_BlockSpecial.cc ../src/BlockSpecial.cc
 test_PipeCapture_SOURCES  = test_PipeCapture.cc ../src/PipeCapture.cc
+test_PipeCapture_LDADD    = $(GTEST_LIBS) $(top_builddir)/lib/gtest/lib/libgtest.la
diff --git a/tests/test_PipeCapture.cc b/tests/test_PipeCapture.cc
index b77369c..05ede91 100644
--- a/tests/test_PipeCapture.cc
+++ b/tests/test_PipeCapture.cc
@@ -25,6 +25,7 @@
 #include "gtest/gtest.h"
 
 #include <stddef.h>
+#include <stdio.h>
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
@@ -159,3 +160,19 @@ TEST_F( PipeCaptureTest, ShortASCIIText )
 }
 
 }  // namespace GParted
+
+// Custom Google Test main() which also initialises the Glib threading system for
+// distributions with glib/glibmm before version 2.32.
+// References:
+// *   Google Test, Primer, Writing the main() Function
+// *   Deprecated thread API, g_thread_init()
+//     https://developer.gnome.org/glib/stable/glib-Deprecated-Thread-APIs.html#g-thread-init
+int main( int argc, char **argv )
+{
+       printf("Running main() from %s\n", __FILE__ );
+       testing::InitGoogleTest( &argc, argv );
+
+       Glib::thread_init();
+
+       return RUN_ALL_TESTS();
+}