BUG: don't compile duplicated files several time

Modules/ThirdParty/6S/src/CMakeLists.txt

@@ -66,6 +66,20 @@ list(REMOVE_ITEM LIBF2C_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/libf2c/main.c" )
 list(REMOVE_ITEM LIBF2C_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/libf2c/getarg_.c" )
 list(REMOVE_ITEM LIBF2C_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/libf2c/iargc_.c" )
 
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/aeroprof_com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/multorder_com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_del__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_ier__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/num_quad__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_aer__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_disc__com.c" )
+
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_planesim__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/mie_in__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_atm__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_ffu__com.c" )
+list(REMOVE_ITEM OTB6S_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/6SV1.0B/sixs_test__com.c" )
+
 # Main code source
 set(OTB6S_MAIN_SRCS
   otb_main6S_function.c                # otb 6S main function