CMAKE include_directories

Question

I am trying to link my library with some other library lib1 using CMAKE 2.8 . It should be said it's on Windows.

In CMakeLists.txt I have:

add_library(mylib ${sources})
include_directories(${CMAKE_SOURCE_DIR}/lib1/include)
target_link_libraries(mylib ${lib1_path})

But compiler says that some #include <lib1/foo.h> in my library is unresolved, maybe because there is no -I.../lib1/include command-line parameter for gcc .

UPDATE : It should be said that compiler is complaining when compiling TESTS not the mylib .

Answer 1

Check the following:

1. Does the path ${CMAKE_SOURCE_DIR}/lib1/include/lib1/foo.h exist?

2. Quote ( " ) the path passed to include_directories , otherwise you may be passing several paths when it is split by spaces

3. Try running make VERBOSE=1 to see exactly what options are being passed to gcc

Answer 2

Try to move include_directories() invokation before add_library.

add_library() instructs CMake to compile your sources into library using current set of compiler flags. Altering these flags after compiling do not have any effect. CMake language is not declarative.