我有一个C项目，我打算用Ceedling，CMock和Unity stack测试。我在运行测试时确实有一个问题...
我的项目结构如下

mytest
    ├── lib
    │   ├── bar.c
    │   └── include
    │       └── bar.h
    ├── project.yml
    ├── src
    │   ├── foo.c
    │   └── include
    │       └── foo.h
    └── test
        ├── support
        └── test_foo.c

还有我的Ceedling项目.yml文件

---

# Notes:
# Sample project C code is not presently written to produce a release artifact.
# As such, release build options are disabled.
# This sample, therefore, only demonstrates running a collection of unit tests.

:project:
  :use_exceptions: FALSE
  :use_test_preprocessor: TRUE
  :use_auxiliary_dependencies: TRUE
  :build_root: build
#  :release_build: TRUE
  :test_file_prefix: test_
  :which_ceedling: gem
  :ceedling_version: 0.31.1
  :default_tasks:
    - test:all

#:test_build:
#  :use_assembly: TRUE

#:release_build:
#  :output: MyApp.out
#  :use_assembly: FALSE

:environment:

:extension:
  :executable: .out

:paths:
  :test:
    - +:test/**
    - -:test/support
  :source:
    - src/**
    - src/include
    - lib/**
    - lib/include
  :support:
    - test/support
  :libraries: []

:defines:
  # in order to add common defines:
  #  1) remove the trailing [] from the :common: section
  #  2) add entries to the :common: section (e.g. :test: has TEST defined)
  :common: &common_defines []
  :test:
    - *common_defines
    - TEST
  :test_preprocess:
    - *common_defines
    - TEST

:cmock:
  :mock_prefix: mock_
  :when_no_prototypes: :warn
  :enforce_strict_ordering: TRUE
  :plugins:
    - :ignore
    - :callback
  :treat_as:
    uint8:    HEX8
    uint16:   HEX16
    uint32:   UINT32
    int8:     INT8
    bool:     UINT8

# Add -gcov to the plugins list to make sure of the gcov plugin
# You will need to have gcov and gcovr both installed to make it work.
# For more information on these options, see docs in plugins/gcov
:gcov:
  :reports:
    - HtmlDetailed
  :gcovr:
    :html_medium_threshold: 75
    :html_high_threshold: 90

#:tools:
# Ceedling defaults to using gcc for compiling, linking, etc.
# As [:tools] is blank, gcc will be used (so long as it's in your system path)
# See documentation to configure a given toolchain for use

# LIBRARIES
# These libraries are automatically injected into the build process. Those specified as
# common will be used in all types of builds. Otherwise, libraries can be injected in just
# tests or releases. These options are MERGED with the options in supplemental yaml files.
:libraries:
  :placement: :end
  :flag: "-l${1}"
  :path_flag: "-L ${1}"
  :system: []    # for example, you might list 'm' to grab the math library
  :test: []
  :release: []

:plugins:
  :load_paths:
    - "#{Ceedling.load_path}"
  :enabled:
    - stdout_pretty_tests_report
    - module_generator
...

巴.h：

int addMe(int a, int b);

巴C：

#include "bar.h"

int addMe(int a, int b) 
{
    return a + b;
}

foo.h：

#ifndef FOO_H
#define FOO_H

    int addMore(int a, int b, int c);

#endif // FOO_H

表C：

#include "bar.h"
#include "foo.h"

int addMore(int a, int b, int c)
{
    return addMe(a, b) + c;
}

我的测试文件test_foo. c如下所示：

#include "unity.h"
#include "foo.h"

void setUp(void)
{
}

void tearDown(void)
{
}

void test_foo_addMore(void)
{
    printf("%d", addMore(1, 2, 3));
}

运行ceedling test:all时，出现如下错误：

/usr/bin/ld: build/test/out/c/foo.o: in function `addMore':
/home/USER/mytest/src/foo.c:6: undefined reference to `addMe'

如果包含bar.h头文件，一切都正常，但为什么我必须这样做呢？我在已经包含bar.h的地方包含了foo.h。
我还将src/include bin bin/include文件路径添加到项目.yml中。
那么，这是为什么呢？
尝试按照我描述的方式设置项目，它并没有按照我想象的方式行事。