.ycm_extra_conf.py

import subprocess
import os


platform_layer = [
    'handmade_platform.h',
    'handmade_shared.h',
    'SDL2/SDL.h',
    'SDL2/SDL_opengl.h',
    'stdio.h',
    'unistd.h',
    'fcntl.h',
    'glob.h',
    'dlfcn.h',
    'sys/types.h',
    'sys/stat.h',
    'sys/mman.h',
    'sys/wait.h',
    'x86intrin.h',
    'sdl_handmade.h',
    'handmade_render.h',
    'handmade_opengl.h'
]

dll_layer = [
    'handmade.h'
]


includes_per_file = {
    'sdl_handmade.cpp': [],
    'handmade_sort.cpp': platform_layer,
    'handmade_opengl.cpp': platform_layer,
    'handmade_render.cpp': platform_layer,
}


def FlagsForFile_old(file_name, **kwargs):
    ftail = os.path.basename(file_name)
    includes = (includes_per_file[ftail]
                if ftail in includes_per_file else dll_layer)

    incl_flags = list()
    for i in includes:
        incl_flags.extend(['-include', i])

    return {
      'flags': [
          '-x', 'c++',
          "-DDEBUG",
          "-g",
          "-Wall",
          "-Wno-write-strings",
          "-Wno-unused-variable",
          "-Wno-unused-function",
          "-Wno-sign-compare",
          "-Wno-unused-result",
          "-Wno-strict-aliasing",
          "-Wno-switch",
          "-Wno-missing-braces",
          "-Wno-null-dereference",
          "-std=c++11",
          "-fno-rtti",
          "-fno-exceptions",
          "-DHANDMADE_INTERNAL=1",
          "-DHANDMADE_SLOW=1",
          "-DHANDMADE_SDL=1",
          "-I" + os.path.join(os.path.dirname(__file__),
                              'cpp/code'),
      ] + subprocess.check_output(['sdl2-config', '--cflags']).split() +
      incl_flags
    }


def FlagsForFile(file_name, **kwargs):
    sdl = os.path.join(os.path.dirname(__file__), 'code')
    head = os.path.dirname(file_name)
    if head == sdl:
        tu = os.path.join(sdl, 'sdl_handmade.cpp')
    else:
        tu = os.path.join(os.path.dirname(__file__),
                          'cpp',
                          'code',
                          'handmade.cpp')

    return {
        # "unity" build
        'override_filename': tu,
        'flags': [
            '-x', 'c++',
            "-DDEBUG",
            "-g",
            "-Wall",
            "-Wno-write-strings",
            "-Wno-unused-variable",
            "-Wno-unused-function",
            "-Wno-sign-compare",
            "-Wno-unused-result",
            "-Wno-strict-aliasing",
            "-Wno-switch",
            "-Wno-missing-braces",
            "-Wno-null-dereference",
            "-std=c++11",
            "-fno-rtti",
            "-fno-exceptions",
            "-DHANDMADE_INTERNAL=1",
            "-DHANDMADE_SLOW=1",
            "-DHANDMADE_SDL=1",
            "-I" + os.path.join(os.path.dirname(__file__),
                                'cpp/code'),
        ] + subprocess.check_output(['sdl2-config', '--cflags']).split()
    }

better (removing junk):

import subprocess
import os


def FlagsForFile(file_name, **kwargs):
    sdl = os.path.join(os.path.dirname(__file__), 'code')
    head = os.path.dirname(file_name)
    if head == sdl:
        tu = os.path.join(sdl, 'sdl_handmade.cpp')
    else:
        tu = os.path.join(os.path.dirname(__file__),
                          'cpp',
                          'code',
                          'handmade.cpp')

    return {
        # "unity" build
        'override_filename': tu,
        'flags': [
            '-x', 'c++',
            "-DDEBUG",
            "-g",
            "-Wall",
            "-Wno-write-strings",
            "-Wno-unused-variable",
            "-Wno-unused-function",
            "-Wno-sign-compare",
            "-Wno-unused-result",
            "-Wno-strict-aliasing",
            "-Wno-switch",
            "-Wno-missing-braces",
            "-Wno-null-dereference",
            "-std=c++11",
            "-fno-rtti",
            "-fno-exceptions",
            "-DHANDMADE_INTERNAL=1",
            "-DHANDMADE_SLOW=1",
            "-DHANDMADE_SDL=1",
            "-I" + os.path.join(os.path.dirname(__file__),
                                'cpp/code'),
        ] + subprocess.check_output(['sdl2-config', '--cflags']).split()
    }