Fix build on PPC64 and on others with unusual environments

- If OPTIONS don't match the environment, pass suitable CMake
   arguments; modernise the one for gpsd
 - Import patches from Gentoo, already submitted upstream, for
   dealing with optional dependencies

Reported by:	Piotr Kubaj
Obtained from:	Andreas Sturmlechner

astro/marble/Makefile

@@ -37,10 +37,10 @@ OPTIONS_SUB=	yes
 
 GPS_DESC=		Support for GPS position provider
 GPS_LIB_DEPENDS=	libgps.so:astro/gpsd
-GPS_CMAKE_OFF=		-DWITH_libgps:BOOL=FALSE
+GPS_CMAKE_BOOL_ON=		WITH_libgps
 
 WEBENGINE_DESC=		Add dependency on qt5-webengine
 WEBENGINE_USE=		QT=webengine
-WEBENGINE_CMAKE_BOOL=	WEBENGINE
+WEBENGINE_CMAKE_BOOL_OFF=	CMAKE_DISABLE_FIND_PACKAGE_Qt5WebEngineWidgets
 
 .include <bsd.port.mk>

astro/marble/files/patch-CMakeLists.txt

@@ -1,15 +1,29 @@
---- CMakeLists.txt.orig	2018-12-30 17:28:44 UTC
+From bc206d50cf8c0d0fc9f90cce58a2499ec945bd29 Mon Sep 17 00:00:00 2001
+From: Andreas Sturmlechner <asturm@gentoo.org>
+Date: Wed, 9 Jan 2019 20:41:28 +0100
+Subject: [PATCH] Avoid overwriting Qt5_FOUND with Qt5DBus or Qt5WebEngine
+ disabled
+
+---
+ CMakeLists.txt | 17 ++++++-----------
+ 1 file changed, 6 insertions(+), 11 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9261a67a4..82f7206d2 100644
+--- CMakeLists.txt
 +++ CMakeLists.txt
-@@ -76,6 +76,7 @@ include( MarbleMacros )
- # Generate the tiles with the tilecreator at compile time
- # if this option is set, srtm.jpg will not be installed but the generated tiles instead
- option(MOBILE "Create a Marble version optimized for handheld devices")
-+option(WEBENGINE "Build browser plugin" ON)
+@@ -121,18 +121,13 @@ find_package(Qt5 ${REQUIRED_QT_VERSION} REQUIRED
+ )
  
- ####################################################
- # Build a D-Bus interface for the Marble widget
-@@ -128,15 +129,17 @@ if(CMAKE_SYSTEM_NAME STREQUAL Android)
-     )
+ if(CMAKE_SYSTEM_NAME STREQUAL Android)
+-    find_package(Qt5 ${REQUIRED_QT_VERSION} REQUIRED
+-        COMPONENTS
+-            Positioning
+-            Multimedia
+-    )
++    find_package(Qt5Positioning ${REQUIRED_QT_VERSION} REQUIRED)
++    find_package(Qt5Multimedia)
++
     set ( MARBLE_NO_WEBKITWIDGETS TRUE )
  else()
 -   find_package(Qt5 ${REQUIRED_QT_VERSION}
@@ -17,20 +31,19 @@
 -            WebEngine
 -            WebEngineWidgets
 -    )
-+   if(WEBENGINE)
-+       find_package(Qt5 ${REQUIRED_QT_VERSION}
-+            COMPONENTS
-+                WebEngine
-+                WebEngineWidgets
-+        )
++    find_package(Qt5WebEngine ${REQUIRED_QT_VERSION})
++    find_package(Qt5WebEngineWidgets ${REQUIRED_QT_VERSION})
  
--   if ( NOT Qt5WebEngineWidgets_FOUND )
--     set ( MARBLE_NO_WEBKITWIDGETS TRUE )
--   endif()
-+       if( NOT Qt5WebEngineWidgets_FOUND )
-+           set ( MARBLE_NO_WEBKITWIDGETS TRUE )
-+       endif()
-+    endif()
+    if ( NOT Qt5WebEngineWidgets_FOUND )
+      set ( MARBLE_NO_WEBKITWIDGETS TRUE )
+@@ -140,7 +135,7 @@ else()
  endif()
  
  if (BUILD_WITH_DBUS)
+-  find_package(Qt5 ${REQUIRED_QT_VERSION} COMPONENTS DBus)
++  find_package(Qt5DBus ${REQUIRED_QT_VERSION} COMPONENTS)
+   if (NOT Qt5DBus_FOUND)
+     set(MARBLE_NO_DBUS TRUE)
+   endif()
+-- 
+2.20.1

astro/marble/files/patch-src_lib_marble_CMakeLists.txt

@@ -0,0 +1,32 @@
+diff --git a/src/lib/marble/CMakeLists.txt b/src/lib/marble/CMakeLists.txt
+index 155c0fc51..1ce5f5f52 100644
+--- src/lib/marble/CMakeLists.txt
++++ src/lib/marble/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-PROJECT(marblewidget)
++# PROJECT(marblewidget)
+ 
+ macro_optional_find_package(Phonon4Qt5 QUIET)
+ marble_set_package_properties( Phonon4Qt5 PROPERTIES
+@@ -13,6 +13,10 @@ endif()
+ CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/config-phonon.h.cmake
+                ${CMAKE_CURRENT_BINARY_DIR}/config-phonon.h)
+ 
++if(MARBLE_NO_WEBKITWIDGETS)
++    add_definitions(-DMARBLE_NO_WEBKITWIDGETS)
++endif()
++
+ INCLUDE_DIRECTORIES(
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}
+@@ -47,10 +51,6 @@ set(MARBLE_ABI_VERSION "28")
+ 
+ ########### next target ###############
+ 
+-if(MARBLE_NO_WEBKITWIDGETS)
+-add_definitions(-DMARBLE_NO_WEBKITWIDGETS)
+-endif()
+-
+ set(marblewidget_SRCS
+     ${geodata_SRCS}
+     ${graphicsview_SRCS}