ENH: use the prior include flag for all platforms

SuperBuild/CMake/External_otb.cmake

@@ -137,9 +137,6 @@ if(APPLE)
     env
     ${LDLIBVAR}=${CMAKE_INSTALL_PREFIX}/lib:$ENV{${LDLIBVAR}}
     ${CMAKE_COMMAND})
-  list(APPEND OTB_SB_CONFIG
-    -DCMAKE_C_FLAGS:STRING=-I${CMAKE_INSTALL_PREFIX}/include
-    -DCMAKE_CXX_FLAGS:STRING=-I${CMAKE_INSTALL_PREFIX}/include)
 else()
   set(OTB_SB_CMAKE_COMMAND ${SB_CMAKE_COMMAND})
 endif()
@@ -147,8 +144,8 @@ endif()
 # forward compilation flags
 set(OTB_SB_COMPILATION_FLAGS
     -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
-    -DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}
-    -DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}
+    -DCMAKE_C_FLAGS:STRING="${SB_PRIOR_INCLUDE_FLAGS} ${CMAKE_C_FLAGS}"
+    -DCMAKE_CXX_FLAGS:STRING="${SB_PRIOR_INCLUDE_FLAGS} ${CMAKE_CXX_FLAGS}"
     -DCMAKE_EXE_LINKER_FLAGS:STRING=${CMAKE_EXE_LINKER_FLAGS}
     -DCMAKE_MODULE_LINKER_FLAGS:STRING=${CMAKE_MODULE_LINKER_FLAGS}
     -DCMAKE_SHARED_LINKER_FLAGS:STRING=${CMAKE_SHARED_LINKER_FLAGS}

SuperBuild/CMakeLists.txt

@@ -62,6 +62,7 @@ if(WIN32)
   if(MSVC)
     set(SB_CMAKE_COMMAND ${CMAKE_COMMAND})
      set(SB_BUILD_SHARED_LIBS OFF)
+    set(SB_PRIOR_INCLUDE_FLAGS "/I\"${CMAKE_INSTALL_PREFIX}/include\"")
   endif()      
 else(UNIX)
   if(APPLE)
@@ -74,6 +75,7 @@ else(UNIX)
     set(SB_CMAKE_COMMAND env ${LDLIBVAR}=${CMAKE_INSTALL_PREFIX}/lib:$ENV{${LDLIBVAR}}  CC=${CMAKE_C_COMPILER} CXX=${CMAKE_CXX_COMPILER} ${CMAKE_COMMAND})
     message(STATUS "Environment setup for Configure : ${SB_ENV_CONFIGURE_CMD}")
   endif()
+  set(SB_PRIOR_INCLUDE_FLAGS "-I${CMAKE_INSTALL_PREFIX}/include")
 endif()
 
 # Call external projects