Initial depends addition

Depends cross compiles project dependencies for linux, mac and windows and multiple architectures.
Depends is original work by Cory Fields and used in bitcoin and a wide range of bitcoin related projects.

contrib/depends/patches/qt/fix-xcb-include-order.patch

@@ -0,0 +1,49 @@
+--- old/qtbase/src/plugins/platforms/xcb/xcb_qpa_lib.pro 2015-03-17
++++ new/qtbase/src/plugins/platforms/xcb/xcb_qpa_lib.pro 2015-03-17
+@@ -76,8 +76,6 @@
+ 
+ DEFINES += $$QMAKE_DEFINES_XCB
+ LIBS += $$QMAKE_LIBS_XCB
+-QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_XCB
+-QMAKE_CFLAGS += $$QMAKE_CFLAGS_XCB
+ 
+ CONFIG += qpa/genericunixfontdatabase
+ 
+@@ -89,7 +87,8 @@
+ contains(QT_CONFIG, xcb-qt) {
+     DEFINES += XCB_USE_RENDER
+     XCB_DIR = ../../../3rdparty/xcb
+-    INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/sysinclude
++    QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
++    QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
+     LIBS += -lxcb -L$$MODULE_BASE_OUTDIR/lib -lxcb-static$$qtPlatformTargetSuffix()
+ } else {
+     LIBS += -lxcb -lxcb-image -lxcb-icccm -lxcb-sync -lxcb-xfixes -lxcb-shm -lxcb-randr -lxcb-shape -lxcb-keysyms -lxcb-xinerama
+--- old/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro
++++ new/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro
+@@ -9,7 +9,8 @@
+ 
+ XCB_DIR = ../../../../3rdparty/xcb
+ 
+-INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/include/xcb $$XCB_DIR/sysinclude
++QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/include/xcb -I$$XCB_DIR/sysinclude
++QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/include/xcb -I$$XCB_DIR/sysinclude
+ 
+ QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_XCB
+ QMAKE_CFLAGS += $$QMAKE_CFLAGS_XCB
+--- old/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro
++++ new/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro
+@@ -6,6 +6,13 @@
+     qxcbmain.cpp
+ OTHER_FILES += xcb.json README
+ 
++contains(QT_CONFIG, xcb-qt) {
++    DEFINES += XCB_USE_RENDER
++    XCB_DIR = ../../../3rdparty/xcb
++    QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
++    QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
++}
++
+ PLUGIN_TYPE = platforms
+ PLUGIN_CLASS_NAME = QXcbIntegrationPlugin
+ !equals(TARGET, $$QT_DEFAULT_QPA_PLUGIN): PLUGIN_EXTENDS = -

contrib/depends/patches/qt/fix_qt_pkgconfig.patch

@@ -0,0 +1,11 @@
+--- old/qtbase/mkspecs/features/qt_module.prf
++++ new/qtbase/mkspecs/features/qt_module.prf
+@@ -245,7 +245,7 @@
+ load(qt_targets)
+ 
+ # this builds on top of qt_common
+-!internal_module:!lib_bundle:if(unix|mingw) {
++unix|mingw {
+     CONFIG += create_pc
+     QMAKE_PKGCONFIG_DESTDIR = pkgconfig
+     host_build: \

contrib/depends/patches/qt/mac-qmake.conf

@@ -0,0 +1,25 @@
+MAKEFILE_GENERATOR = UNIX
+CONFIG += app_bundle incremental global_init_link_order lib_version_first plugin_no_soname absolute_library_soname
+QMAKE_INCREMENTAL_STYLE = sublib
+include(../common/macx.conf)
+include(../common/gcc-base-mac.conf)
+include(../common/clang.conf)
+include(../common/clang-mac.conf)
+QMAKE_MAC_SDK_PATH=$${MAC_SDK_PATH}
+QMAKE_XCODE_VERSION=4.3
+QMAKE_XCODE_DEVELOPER_PATH=/Developer
+QMAKE_MACOSX_DEPLOYMENT_TARGET = $${MAC_MIN_VERSION}
+QMAKE_MAC_SDK=macosx
+QMAKE_MAC_SDK.macosx.Path = $${MAC_SDK_PATH}
+QMAKE_MAC_SDK.macosx.platform_name = macosx
+QMAKE_MAC_SDK.macosx.SDKVersion = $${MAC_SDK_VERSION}
+QMAKE_MAC_SDK.macosx.PlatformPath = /phony
+!host_build: QMAKE_CFLAGS += -target $${MAC_TARGET}
+!host_build: QMAKE_OBJECTIVE_CFLAGS += $$QMAKE_CFLAGS
+!host_build: QMAKE_CXXFLAGS += $$QMAKE_CFLAGS
+!host_build: QMAKE_LFLAGS += -target $${MAC_TARGET} -mlinker-version=$${MAC_LD64_VERSION}
+QMAKE_AR = $${CROSS_COMPILE}ar cq
+QMAKE_RANLIB=$${CROSS_COMPILE}ranlib
+QMAKE_LIBTOOL=$${CROSS_COMPILE}libtool
+QMAKE_INSTALL_NAME_TOOL=$${CROSS_COMPILE}install_name_tool
+load(qt_config)

contrib/depends/patches/qt/mingw-uuidof.patch

@@ -0,0 +1,44 @@
+--- old/qtbase/src/plugins/platforms/windows/qwindowscontext.cpp
++++ new/qtbase/src/plugins/platforms/windows/qwindowscontext.cpp
+@@ -77,7 +77,7 @@
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <windowsx.h>
+-#ifndef Q_OS_WINCE
++#if !defined(Q_OS_WINCE) && (!defined(USE___UUIDOF) || (defined(USE___UUIDOF) && USE___UUIDOF == 1))
+ #  include <comdef.h>
+ #endif
+ 
+@@ -814,7 +814,7 @@
+                           HWND_MESSAGE, NULL, static_cast<HINSTANCE>(GetModuleHandle(0)), NULL);
+ }
+ 
+-#ifndef Q_OS_WINCE
++#if !defined(Q_OS_WINCE) && (!defined(USE___UUIDOF) || (defined(USE___UUIDOF) && USE___UUIDOF == 1))
+ // Re-engineered from the inline function _com_error::ErrorMessage().
+ // We cannot use it directly since it uses swprintf_s(), which is not
+ // present in the MSVCRT.DLL found on Windows XP (QTBUG-35617).
+@@ -833,7 +833,7 @@
+          return QString::asprintf("IDispatch error #%u", uint(wCode));
+      return QString::asprintf("Unknown error 0x0%x", uint(comError.Error()));
+ }
+-#endif // !Q_OS_WINCE
++#endif // !defined(Q_OS_WINCE) && (!defined(USE___UUIDOF) || (defined(USE___UUIDOF) && USE___UUIDOF == 1))
+ 
+ /*!
+     \brief Common COM error strings.
+@@ -901,12 +901,12 @@
+     default:
+         break;
+     }
+-#ifndef Q_OS_WINCE
++#if !defined(Q_OS_WINCE) && (!defined(USE___UUIDOF) || (defined(USE___UUIDOF) && USE___UUIDOF == 1))
+     _com_error error(hr);
+     result += QByteArrayLiteral(" (");
+     result += errorMessageFromComError(error);
+     result += ')';
+-#endif // !Q_OS_WINCE
++#endif // !defined(Q_OS_WINCE) && (!defined(USE___UUIDOF) || (defined(USE___UUIDOF) && USE___UUIDOF == 1))
+     return result;
+ }
+ 

contrib/depends/patches/qt/pidlist_absolute.patch

@@ -0,0 +1,37 @@
+diff -dur old/qtbase/src/plugins/platforms/windows/qwindowscontext.h new/qtbase/src/plugins/platforms/windows/qwindowscontext.h
+--- old/qtbase/src/plugins/platforms/windows/qwindowscontext.h
++++ new/qtbase/src/plugins/platforms/windows/qwindowscontext.h
+@@ -136,10 +136,18 @@
+     inline void init();
+ 
+     typedef HRESULT (WINAPI *SHCreateItemFromParsingName)(PCWSTR, IBindCtx *, const GUID&, void **);
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++    typedef HRESULT (WINAPI *SHGetKnownFolderIDList)(const GUID &, DWORD, HANDLE, ITEMIDLIST **);
++#else
+     typedef HRESULT (WINAPI *SHGetKnownFolderIDList)(const GUID &, DWORD, HANDLE, PIDLIST_ABSOLUTE *);
++#endif
+     typedef HRESULT (WINAPI *SHGetStockIconInfo)(int , int , _SHSTOCKICONINFO *);
+     typedef HRESULT (WINAPI *SHGetImageList)(int, REFIID , void **);
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++    typedef HRESULT (WINAPI *SHCreateItemFromIDList)(const ITEMIDLIST *, REFIID, void **);
++#else
+     typedef HRESULT (WINAPI *SHCreateItemFromIDList)(PCIDLIST_ABSOLUTE, REFIID, void **);
++#endif
+ 
+     SHCreateItemFromParsingName sHCreateItemFromParsingName;
+     SHGetKnownFolderIDList sHGetKnownFolderIDList;
+diff -dur old/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp new/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
+--- old/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
++++ new/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
+@@ -1016,7 +1016,11 @@
+             qWarning() << __FUNCTION__ << ": Invalid CLSID: " << url.path();
+             return Q_NULLPTR;
+         }
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++        ITEMIDLIST *idList;
++#else
+         PIDLIST_ABSOLUTE idList;
++#endif
+         HRESULT hr = QWindowsContext::shell32dll.sHGetKnownFolderIDList(uuid, 0, 0, &idList);
+         if (FAILED(hr)) {
+             qErrnoWarning("%s: SHGetKnownFolderIDList(%s)) failed", __FUNCTION__, qPrintable(url.toString()));