Force static build if building with NaCl's newlib.

CMakeLists.txt

@@ -65,14 +65,19 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/modules/")
 
 find_package(Corrade REQUIRED)
 
-if(BUILD_STATIC)
-    set(MAGNUM_BUILD_STATIC 1)
-endif()
-
 # If targeting NaCl, set explicit OpenGL ES 2.0 support
 if(CORRADE_TARGET_NACL)
     set(TARGET_GLES 1)
     set(TARGET_GLES2 1)
+
+    # Newlib toolchain supports only static linking
+    if(CORRADE_TARGET_NACL_NEWLIB)
+        set(BUILD_STATIC OFF)
+    endif()
+endif()
+
+if(BUILD_STATIC)
+    set(MAGNUM_BUILD_STATIC 1)
 endif()
 
 # Check dependencies