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CMake - definition of paths and inclusion libraries in the top level CMakeLists.txt

My source tree looks like this:

--- src/CMakeLists.txt
--- src/MoonLanding/
----- CMakeLists.txt
----- main.cpp

To build a project MoonLandingin src/Moonlanding/, I do the following

cmake . -DGFLAGS_INCLUDE_DIR=${CBVR_DEPENDENCIES}/gflags/build/include \
  -DGFLAGS_LIBRARY=${CBVR_DEPENDENCIES}/gflags/build/lib/libgflags.a \
  -DAtlas_CBLAS_INCLUDE_DIR=${CBVR_DEPENDENCIES}/ATLAS-install/include \
  -DAtlas_CBLAS_LIBRARY=${CBVR_DEPENDENCIES}/ATLAS-install/lib/libcblas.a \
  -DAtlas_CLAPACK_INCLUDE_DIR=${CBVR_DEPENDENCIES}/ATLAS-install/include \
  -DAtlas_LAPACK_LIBRARY=${CBVR_DEPENDENCIES}/ATLAS-install/lib/liblapack.a \
  -DAtlas_BLAS_LIBRARY=${CBVR_DEPENDENCIES}/ATLAS-install/lib/libatlas.a \
  -DLMDB_INCLUDE_DIR=${CBVR_DEPENDENCIES}/mdb/libraries/liblmdb \
  -DLMDB_LIBRARIES=${CBVR_DEPENDENCIES}/mdb/libraries/liblmdb/liblmdb.so \
  -DBOOST_ROOT=${CBVR_DEPENDENCIES}/boost_1_56_0/

The above cmake call works fine and MoonLandingcompiles.

However, I want to call cmake .under src/. For this, I defined src/CMakeLists.txtas follows:

set(GFLAGS_INCLUDE_DIR $ENV{CBVR_DEPENDENCIES}/gflags/build/include)
set(GFLAGS_LIBRARY $ENV{CBVR_DEPENDENCIES}/gflags/build/lib/libgflags.a)
set(Atlas_CBLAS_INCLUDE_DIR $ENV{CBVR_DEPENDENCIES}/ATLAS-install/include)
set(Atlas_CBLAS_LIBRARY $ENV{CBVR_DEPENDENCIES}/ATLAS-install/lib/libcblas.a)
set(Atlas_CLAPACK_INCLUDE_DIR $ENV{CBVR_DEPENDENCIES}/ATLAS-install/include)
set(Atlas_LAPACK_LIBRARY $ENV{CBVR_DEPENDENCIES}/ATLAS-install/lib/liblapack.a)
set(Atlas_BLAS_LIBRARY $ENV{CBVR_DEPENDENCIES}/ATLAS-install/lib/libatlas.a)
set(LMDB_INCLUDE_DIR $ENV{CBVR_DEPENDENCIES}/mdb/libraries/liblmdb)
set(LMDB_LIBRARIES $ENV{CBVR_DEPENDENCIES}/mdb/libraries/liblmdb/liblmdb.so)
set(BOOST_ROOT $ENV{CBVR_DEPENDENCIES}/boost_1_56_0/)

add_subdirectory(Moonlanding)

Then CMake gives me an error:

CMake Error at /usr/local/share/cmake-3.0/Modules/FindPackageHandleStandardArgs.cmake:136 (message):
  Could NOT find LMDB (missing: LMDB_INCLUDE_DIR LMDB_LIBRARIES)

If I call again cmake, the error will disappear. In general, I need to call cmake .three times src/Moonlandingto compile from src/. Why is this and is there a cleaner way to achieve the project?

(The reason I want to separate GFLAGS_INCLUDE_DIR and other directives is to help automate the build process for the user.)

+4
1

( ) cmake set() .

, :

set(GFLAGS_INCLUDE_DIR $ENV{CBVR_DEPENDENCIES}/gflags/build/include CACHE PATH "Some comment here")
# other sets with "CACHE" addition

PS. , cmake

+3

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