[CMake] Object file as first one in link.txt file

[Juan Pablo Hernandez Vogt]

Hello everybody,

I moving a makefile to cmake, and after errors I could check that order in
link chain was important.

1) CMake generates this link.txt (error when linking)
/usr/bin/c++       -lfusion_io -ladios -lmxml -lmpi -lopen-rte -lopen-pal
-lpthread -lstdc++ CMakeFiles/niio-main.dir/main.cpp.o  -o niio-main
-rdynamic -L/home/testuser/dev/niio/lib
-L/home/testuser/dev/niio/openmpi/lib


2) Desired linking that works:
/usr/bin/c++       CMakeFiles/niio-main.dir/main.cpp.o -lfusion_io -ladios
-lmxml -lmpi -lopen-rte -lopen-pal -lpthread -lstdc++   -o niio-main
-rdynamic -L/home/testuser/dev/niio/lib
-L/home/testuser/dev/niio/openmpi/lib


My question is, how to fix in my CMakeLists.txt to have main.cpp.o first in
the sequence of the link command?


My current code is:

set(TARGET_NAME "niio-main")

link_directories("${PROJECT_SOURCE_DIR}/lib")
link_directories("${PROJECT_SOURCE_DIR}/openmpi/lib")

add_executable(${TARGET_NAME} main.cpp)

include_directories("${PROJECT_SOURCE_DIR}")
include_directories("${PROJECT_SOURCE_DIR}/openmpi/include")

add_definitions( -DOMPI_SKIP_MPICXX -DDEBUG -DNI_IO -DNI_MPI )

set_target_properties(${TARGET_NAME} PROPERTIES COMPILE_FLAGS "-fPIC -g
-Wall -Wno-deprecated")

set_target_properties(${TARGET_NAME} PROPERTIES LINK_FLAGS "-lfusion_io
-ladios -lmxml -lmpi -lopen-rte -lopen-pal -lpthread -lstdc++")



Thank you very much,

JP
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