contrib: add dbus-c++ package on gnu/linux

Add dbus-cpp into contrib system to force patches for all gnu/linux
platforms that use this library.
The problem with this library, it is not longer active and lacks of
support on recent changes as the compatibility break with gcc-7.

Credits: patches provided by this commit come from Fedora dbug-c++
package sources.

Change-Id: Ib06a3ee750f9715cfedd6289405828e662e7da94
Reviewed-by: Olivier Soldano <olivier.soldano@savoirfairelinux.com>

contrib/src/dbus-cpp/SHA512SUMS

+7acebbb4254b2886cc0f05c5ddeeeac0b5863c5552d32249463b89380b0b95b8225c80bd98b8c7fcaada42ab770b5eff41b15390cd0d78bf1ee322ac6c2de319  libdbus-c++-0.9.0.tar.gz

contrib/src/dbus-cpp/dbus-c++-gcc4.7.patch

+diff --git a/include/dbus-c++/eventloop-integration.h b/include/dbus-c++/eventloop-integration.h
+index 1b0302e..3e44304 100644
+--- a/include/dbus-c++/eventloop-integration.h
++++ b/include/dbus-c++/eventloop-integration.h
+@@ -26,6 +26,7 @@
+ #define __DBUSXX_EVENTLOOP_INTEGRATION_H
+ 
+ #include <errno.h>
++#include <unistd.h>
+ #include "api.h"
+ #include "dispatcher.h"
+ #include "util.h"

contrib/src/dbus-cpp/dbus-c++-threading.patch

+--- libdbus-c++-0.9.0/include/dbus-c++/dispatcher.h.threading	2017-02-15 13:40:53.796004263 +0000
++++ libdbus-c++-0.9.0/include/dbus-c++/dispatcher.h	2017-02-15 13:40:46.907000493 +0000
+@@ -188,6 +188,7 @@
+ /* classes for multithreading support
+ */
+ 
++#if 0
+ class DXXAPI Mutex
+ {
+ public:
+@@ -243,9 +244,11 @@
+ typedef bool (*CondVarWaitTimeoutFn)(CondVar *cv, Mutex *mx, int timeout);
+ typedef void (*CondVarWakeOneFn)(CondVar *cv);
+ typedef void (*CondVarWakeAllFn)(CondVar *cv);
++#endif
+ 
+ void DXXAPI _init_threading();
+ 
++#if 0
+ void DXXAPI _init_threading(
+   MutexNewFn, MutexFreeFn, MutexLockFn, MutexUnlockFn,
+   CondVarNewFn, CondVarFreeFn, CondVarWaitFn, CondVarWaitTimeoutFn, CondVarWakeOneFn, CondVarWakeAllFn
+@@ -312,6 +315,7 @@
+     cv->wake_all();
+   }
+ };
++#endif
+ 
+ } /* namespace DBus */
+ 
+--- libdbus-c++-0.9.0/src/dispatcher.cpp.threading	2017-02-15 13:48:22.627249868 +0000
++++ libdbus-c++-0.9.0/src/dispatcher.cpp	2017-02-15 13:48:29.164253445 +0000
+@@ -253,6 +253,7 @@
+ #endif//DBUS_HAS_THREADS_INIT_DEFAULT
+ }
+ 
++#if 0
+ void DBus::_init_threading(
+   MutexNewFn m1,
+   MutexFreeFn m2,
+@@ -318,3 +319,4 @@
+ #endif//DBUS_HAS_RECURSIVE_MUTEX
+   dbus_threads_init(&functions);
+ }
++#endif

contrib/src/dbus-cpp/dbus-c++-writechar.patch

+--- libdbus-c++-0.9.0/src/pipe.cpp.writechar	2017-02-16 11:07:13.591950169 +0000
++++ libdbus-c++-0.9.0/src/pipe.cpp	2017-02-16 11:04:17.158796092 +0000
+@@ -83,5 +83,5 @@
+ void Pipe::signal()
+ {
+   // TODO: ignoring return of read/write generates warning; maybe relevant for eventloop work...
+-  ::write(_fd_write, '\0', 1);
++  ::write(_fd_write, "", 1);
+ }

contrib/src/dbus-cpp/rules.mak

+# DBus-C++
+
+DBUS_CPP_VERSION := 0.9.0
+DBUS_CPP_URL := ${SF}/dbus-cplusplus/files/dbus-c%2B%2B/${DBUS_CPP_VERSION}/libdbus-c%2B%2B-${DBUS_CPP_VERSION}.tar.gz/download
+
+ifdef HAVE_LINUX
+ifndef HAVE_ANDROID
+PKGS += dbus-cpp
+endif
+endif
+
+# Package forced as bugged on GCC7
+#ifeq ($(call need_pkg,"dbus-c++-1 >= 0.9.0"),)
+#PKGS_FOUND += dbus-cpp
+#endif
+
+$(TARBALLS)/libdbus-c++-${DBUS_CPP_VERSION}.tar.gz:
+	$(call download,$(DBUS_CPP_URL))
+
+.sum-dbus-cpp: $(TARBALLS)/libdbus-c++-${DBUS_CPP_VERSION}.tar.gz
+
+dbus-cpp: $(TARBALLS)/libdbus-c++-${DBUS_CPP_VERSION}.tar.gz .sum-dbus-cpp
+	$(UNPACK)
+	$(APPLY) $(SRC)/dbus-cpp/dbus-c++-threading.patch
+	$(APPLY) $(SRC)/dbus-cpp/dbus-c++-writechar.patch
+	$(APPLY) $(SRC)/dbus-cpp/dbus-c++-gcc4.7.patch
+	$(UPDATE_AUTOCONFIG)
+	$(MOVE)
+
+.dbus-cpp: dbus-cpp
+	cd $< && $(HOSTVARS) ./configure $(HOSTCONF) --disable-ecore --disable-glib --disable-tests --disable-examples
+	cd $< && $(MAKE) install
+	touch $@