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cmakeclionflex-lexer

How to add a .h file to a flex definition in CMake

So I am trying to use flex in a project with Clion (because I'm on windows), which uses CMake but I cannot compile because my lexer.l file includes token.h my CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)

find_package(FLEX)

FLEX_TARGET(MyScanner lexer.l ${CMAKE_CURRENT_BINARY_DIR}/lex.yy.c)

include_directories(${CMAKE_CURRENT_BINARY_DIR})
add_executable(lexer token.h ${FLEX_MyScanner_OUTPUTS}
         printtoken.c lexan.h lexanl.c )

ERROR:

[ 16%] Building C object CMakeFiles/lexer.dir/lex.yy.c.o
lexan.l:36:10: fatal error: token.h: No such file or directory
compilation terminated.
CMakeFiles/lexer.dir/build.make:74: recipe for target 'CMakeFiles/lexer.dir/lex.yy.c.o' failed

How do I include the token.h?

Solution

  • Problem Solved:

    I had to add ${CMAKE_SOURCE_DIR} to the include_directories() call for it to find the header file.