[CMake] Help cmake First project

[Chuck Atkins]

Hi Rodrigo,

It looks like you are probably missing some source files in your
executable.  Is protpred-Gromacs-NSGA2.c the only piece of code that gets
built for the executable?  If not, you'll need to make sure that all the
necessary source files get either built into the executable or build as a
separate library and linked into the executable.  Also, you can simply your
CMakeLists.txt and clean it up a bit by leaving out the
${2pg_cartesian_SOURCE_DIR} in most commands since CMake looks in the
current directory of the CMakeLists.txt file by default for most of its
functions:

include_directories(include)
add_executable(protpred-Gromacs-NSGA2 src/protpred-Gromacs-NSGA2.c)
install(TARGETS protpred-Gromacs-NSGA2 DESTINATION bin)


- Chuck


On Mon, Aug 4, 2014 at 10:26 AM, Rodrigo Faccioli <
rodrigo.faccioli at gmail.com> wrote:

> Hi,
>
> I'm trying to use cmake in my project. In fact, it is my first time using
> cmake.
>
> My CmakeList file is below. You can see it is very simple because I'm
> trying to compile a binary.
>
> cmake_minimum_required(VERSION 2.8)
>
> project(2pg_cartesian)
> set(PROJECT_VERSION "1.0")
>
> include_directories(${2pg_cartesian_SOURCE_DIR}/include)
>
> add_executable(protpred-Gromacs-NSGA2
> ${2pg_cartesian_SOURCE_DIR}/src/protpred-Gromacs-NSGA2.c)
>
> install(TARGETS protpred-Gromacs-NSGA2 DESTINATION bin)
>
> When I run cmake .. I receive  Build files have been written to:
> /home/faccioli/Downloads/2pg_cartesian/build. I understand that all is
> ok.
>
> faccioli at faccioli:~/Downloads/2pg_cartesian/build$ cmake ..
> -- The C compiler identification is GNU 4.7.2
> -- The CXX compiler identification is GNU 4.7.2
> -- Check for working C compiler: /usr/bin/gcc
> -- Check for working C compiler: /usr/bin/gcc -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Check for working CXX compiler: /usr/bin/c++
> -- Check for working CXX compiler: /usr/bin/c++ -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Configuring done
> -- Generating done
> -- Build files have been written to:
> /home/faccioli/Downloads/2pg_cartesian/build
> faccioli at faccioli:~/Downloads/2pg_cartesian/build$
>
> However, when I run make, I receive an error message as below:
>
> faccioli at faccioli:~/Downloads/2pg_cartesian/build$ make
> Scanning dependencies of target protpred-Gromacs-NSGA2
> [100%] Building C object
> CMakeFiles/protpred-Gromacs-NSGA2.dir/src/protpred-Gromacs-NSGA2.c.o
> Linking C executable protpred-Gromacs-NSGA2
> CMakeFiles/protpred-Gromacs-NSGA2.dir/src/protpred-Gromacs-NSGA2.c.o: In
> function `main':
> protpred-Gromacs-NSGA2.c:(.text+0x1e): undefined reference to `display_msg'
> protpred-Gromacs-NSGA2.c:(.text+0x3e): undefined reference to
> `load_parameters_from_file'
> protpred-Gromacs-NSGA2.c:(.text+0x58): undefined reference to `ea_nsga2'
> protpred-Gromacs-NSGA2.c:(.text+0x64): undefined reference to `fatal_error'
> protpred-Gromacs-NSGA2.c:(.text+0x73): undefined reference to
> `deAllocateload_parameters'
> protpred-Gromacs-NSGA2.c:(.text+0x7d): undefined reference to `display_msg'
> collect2: error: ld returned 1 exit status
> make[2]: ** [protpred-Gromacs-NSGA2] Erro 1
> make[1]: ** [CMakeFiles/protpred-Gromacs-NSGA2.dir/all] Erro 2
> make: ** [all] Erro 2
> faccioli at faccioli:~/Downloads/2pg_cartesian/build$
>
> Could you help me understand how can I fix this problem?
>
> I appreciate any help.
>
> Best regards,
>
> --
> Rodrigo Antonio Faccioli, Ph.D
> Development Software for Structural Bioinformatics
> Barao de Maua University
> University of Sao Paulo
> Lindedin - br.linkedin.com/pub/rodrigo-antonio-faccioli/7/589/a5/
> Curriculum Lattes - http://lattes.cnpq.br/1025157978990218
>
> --
>
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