On Friday 14 September 2007 16:19:05 Bill Hoffman wrote:
> Dizzy wrote:
> > What you are sugesting solves the problem for installable libraries
> > (which were installed in a previous to "cmake time", the time where
> > FIND_LIBRARY() runs). Problem with "convenience libraries" of a project
> > is that they have not been built already when cmake runs for that project
> > (so FIND_LIBRARY cannot find them). Using full paths to them (by using of
> > CMAKE_BUILD_DIR and such variables) seems unportable (or maybe I miss
> > something).
>
> Full paths by the use of PROJECT_SOURCE_DIR and PROJECT_BINARY_DIR and such
> variables is very portable. If Cmake is building the library, then you
> only need to use the target
> name to find it.
The path itself is portable but the library name (which must exist in a full
library path) isn't.
I mean imagine this project:
proj
proj/CMakeLists.txt:
project(prog)
add_subdirectory(lib)
add_subdirectory(exe)
EOF
proj/lib/CMakeLists.txt:
add_library(a lib.c lib.h)
EOF
proj/exe/CMakeLists.txt:
add_executable(prog main.cpp)
target_link_libraries(prog ${PROJECT_BINARY_DIR}/lib/a)
EOF
This obviously does not work (tries to build an unknown target "a") and to
make it work I have to write
target_link_libraries(prog ${PROJECT_BINARY_DIR}/lib/liba.a)
But then if I use "liba.a" as above isn't this unportable? Since with other
than mingw/gcc compilers the output library name isn't "liba.a" but
probably "a.lib" and such. In that case the library wouldn't be found right?
Sorry if this has already been answered...
PS: currently I use link_directories(${PROJECT_BINARY_DIR}/lib) and
target_link_libraries(prog a) which seems to work fine but I raised this
issue as you sugested to Jesper that he should use full paths with
target_link_libraries() which adds this limitation :)
--
Mihai RUSU Email: [EMAIL PROTECTED]
GPG : http://dizzy.roedu.net/dizzy-gpg.txt WWW: http://dizzy.roedu.net
"Linux is obsolete" -- AST
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