CODEWITHSUNDEEP
c++cmakemakefile
WillyWonka
WillyWonka

Reputation: 133

cmake equivalent for MakeFile

I followed this answer to create a CMakeLists.txt for a simple Makefile

Makefile

CC = g++
INCFLAGS = -I/usr/local/include/embree3
LDFLAGS = -L"/usr/local/lib/" -lembree3
RM  = /bin/rm -f

all:
    $(CC) -o main main.cpp $(INCFLAGS) $(LDFLAGS)
clean:
    $(RM) *.o main

CMakeLists.txt

cmake_minimum_required(VERSION 3.1.0)
project(some_project)

include_directories(/usr/local/include/embree3) # -I flags for compiler
link_directories(/usr/local/lib/) # -L flags for linker

add_executable(main main.cpp)

target_link_libraries(main embree)   # -l flags for linking prog target

The Makefile compiles properly and the executable runs without any issues. And to use the cmake file, I do the following (assuming I am in source directory)

  1. mkdir build
  2. cd build
  3. cmake ..
  4. make

The make in step 4 throws the following error

main.cpp:4:10: fatal error: 'embree3/rtcore.h' file not found
#include <embree3/rtcore.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [CMakeFiles/main.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/main.dir/all] Error 2
make: *** [all] Error 2

Upvotes: 0

Views: 707

Answers (1)

Laurent Jospin
Laurent Jospin

Reputation: 614

Ok, so following your answer to my comments, the problem is that since you starts your include instruction by embree3 (which make sense to avoid names conflict), cmake should have as include directory the directory containing the embree3 installation, not the embree3 folder itself.

This is why include_directories(/usr/local/include) is working instead of include_directories(/usr/local/include/embree3).

Upvotes: 1

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