Adding static dependency in CMake - cmake

Question

I've got an example project:
.
├── CMakeLists.txt
└── src
└── test1.f90
where test1.f90 uses a specific version of Lapack (therefore I can't use FindLAPACK).
I am trying to compile this using CMake:
cmake_minimum_required(VERSION 2.5)
project(TEST)
file(GLOB_RECURSE sources src/*.f90)
add_executable(cmake.x ${sources})
enable_language(Fortran)
set(CMAKE_Fortran_COMPILER_ID "IBM")
if(CMAKE_Fortran_COMPILER_ID MATCHES "IBM")
set(CMAKE_SHARED_LIBRARY_LINK_Fortran_FLAGS)
MESSAGE(STATUS "IBM")
SET(CMAKE_EXE_LINKER_FLAGS "-Wl,-allow-multiple-definition ")
set(CMAKE_Fortran_COMPILER mpixlf2008_r)
set(debug "-C")
endif()
set(CMAKE_Fortran_FLAGS_DEBUG "${CMAKE_Fortran_FLAGS_DEBUG} ${bounds}")
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${dialect}")
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
MESSAGE( STATUS "cmake_module_path: " ${CMAKE_MODULE_PATH})
If I run make VERBOSE=1 this results in:
...
[100%] Building Fortran object CMakeFiles/cmake.x.dir/src/test1.o
mpixlf2008_r -c /work/jias12/jias1217/lapack_test/src/test1.f90 -o CMakeFiles/cmake.x.dir/src/test1.o
** main === End of Compilation 1 ===
1501-510 Compilation successful for file test1.f90.
Linking Fortran executable cmake.x
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmake.x.dir/link.txt --verbose=1
mpixlf2008_r -Wl,-allow-multiple-definition CMakeFiles/cmake.x.dir/src/test1.o -o cmake.x
CMakeFiles/cmake.x.dir/src/test1.o:(.text+0x5c): undefined reference to `sgesv'
make[2]: *** [cmake.x] Error 1
make[2]: Leaving directory `/work/jias12/jias1217/lapack_test'
make[1]: *** [CMakeFiles/cmake.x.dir/all] Error 2
make[1]: Leaving directory `/work/jias12/jias1217/lapack_test'
make: *** [all] Error 2
This obviously doesn't work, because I didn't include LAPACK, which I then can do manually:
mpixlf2008_r -Wl,-allow-multiple-definition CMakeFiles/cmake.x.dir/src/test1.o -o cmake.x -L$LAPACK_LIB -L/bgsys/local/lib -llapack -lesslbg
Which works fine. How can I achieve this using CMake? I want to add -L$LAPACK_LIB -L/bgsys/local/lib -llapack -lesslbg to the linker after the *.o files. All I've managed is to add them as flags before the *.o files, which fails. I've look at a number of examples on the web, but I cannot find something which works in my case. This is the test1.f90.
This is in the folders:
> ls $LAPACK_LIB
libblas_extra.a libcblas.a liblapack.a liblapacke.a libtmglib.a
ls /bgsys/local/lib/
BGeic.pm BG.pm libesslbg.a libesslsmpbg.a

Answer 1

As Tsyvarev correctly mentioned:
What is wrong with target_link_libraries which links with the
libraries (meaning of flag -l) and link_directories which specifies
libraries search path (meaning of flag -L)?
Those hase to be called in the right order, which leads to:
cmake_minimum_required(VERSION 2.5)
project(TEST)
file(GLOB_RECURSE sources src/*.f90)
link_directories($ENV{LAPACK_LIB} /bgsys/local/lib)
enable_language(Fortran)
add_executable(cmake.x ${sources})
target_link_libraries(cmake.x lapack esslbg)