[CMake] Adding a link?

[Roger Leigh]

On 06/03/2017 12:43, Bernhard Seckinger wrote:
> Hi all,
>
> I've got a project where meanwhile everything works, using cmake, but a tiny
> detail. I've got a frontend which consists of several php files. I copy them
> into a subfolder of share/ with the install command. Now I need a symlink from
> bin/croco to share/croco/main.php that is, after installing everything else "ln
> -s share/croco/main.php bin/croco" should be executed.
>
> I know, that symlinks are not available in some other OSs, but for the time
> being, I only need a solution, that works using linux.
>
> What I found so far is:
>
> add_custom_command(OUTPUT bin/croco
>                    COMMAND ln -s share/croco/main.php bin/croco
>                    DEPENDS share/croco/main.php)
>
> But that seems to be ignored by "make install". Can you help me?

bzip2 example (from 
https://github.com/ome/ome-cmake-superbuild/blob/master/packages/bzip2/patches/cmake.diff#L163)

# Copy or symlink bunzip2 and bzcat to bzip2
if (WIN32)
     install(CODE "configure_file(\"${CMAKE_INSTALL_FULL_BINDIR}/bzip2.exe\"
 
\"${CMAKE_INSTALL_FULL_BINDIR}/bunzip2.exe\"
                                  COPYONLY)"
             COMPONENT "runtime")
     install(CODE "configure_file(\"${CMAKE_INSTALL_FULL_BINDIR}/bzip2.exe\"
                                  \"${CMAKE_INSTALL_FULL_BINDIR}/bzcat.exe\"
                                  COPYONLY)"
             COMPONENT "runtime")
else()
     install(CODE "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E
             create_symlink bzip2
             \"\$ENV{DESTDIR}${CMAKE_INSTALL_FULL_BINDIR}/bunzip2\")"
             COMPONENT "runtime")
     install(CODE "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E
             create_symlink bzip2
             \"\$ENV{DESTDIR}${CMAKE_INSTALL_FULL_BINDIR}/bzcat\")"
             COMPONENT "runtime")
endif()


Hope that's useful as an example,
Roger