CppuTest:在最终链接期间未定义对pthread的引用

Question

我是cppuTest的新手，实际上我正在尝试在CppuTest根目录中构建./examples。源代码和测试文件的编译没有问题，但我在最后的链接阶段遇到了这个错误：

C:\CppUTest\cpputest-3.7.1\examples>make
compiling AllTests.cpp
compiling CircularBufferTest.cpp
compiling EventDispatcherTest.cpp
compiling HelloTest.cpp
compiling MockDocumentationTest.cpp
compiling PrinterTest.cpp
compiling CircularBuffer.cpp
compiling EventDispatcher.cpp
compiling Printer.cpp
compiling hello.c
Building archive lib/libCppUTestExamples.a
a - objs/ApplicationLib/CircularBuffer.o
a - objs/ApplicationLib/EventDispatcher.o
a - objs/ApplicationLib/Printer.o
a - objs/ApplicationLib/hello.o
Linking CppUTestExamples_tests
../lib/libCppUTest.a(UtestPlatform.cpp.obj): In function     `PThreadMutexCreate':
c:/CppUTest/cpputest-3.7.1/src/Platforms/Gcc/UtestPlatform.cpp:248:     undefined reference to `_imp__pthread_mutex_init'
../lib/libCppUTest.a(UtestPlatform.cpp.obj): In function `PThreadMutexLock':
c:/CppUTest/cpputest-3.7.1/src/Platforms/Gcc/UtestPlatform.cpp:255:     undefined reference to `_imp__pthread_mutex_lock'
../lib/libCppUTest.a(UtestPlatform.cpp.obj): In function     `PThreadMutexUnlock':
c:/CppUTest/cpputest-3.7.1/src/Platforms/Gcc/UtestPlatform.cpp:260:     undefined reference to `_imp__pthread_mutex_unlock'
../lib/libCppUTest.a(UtestPlatform.cpp.obj): In function     `PThreadMutexDestroy':
c:/CppUTest/cpputest-3.7.1/src/Platforms/Gcc/UtestPlatform.cpp:266:     undefined reference to `_imp__pthread_mutex_destroy'
collect2.exe: error: ld returned 1 exit status
make: *** [CppUTestExamples_tests] Error 1

我在Windows7上使用的是MinGW，MinGW也包含pthread.a库。我的makefil如下所示：

#---------
#
# CppUTest Examples Makefile
#
#----------

#Set this to @ to keep the makefile quiet
ifndef SILENCE
    SILENCE = @
endif

#--- Inputs ----#
COMPONENT_NAME = CppUTestExamples
CPPUTEST_HOME = ..

CPPUTEST_USE_EXTENSIONS = Y
CPP_PLATFORM = Gcc

CFLAGS = -Dmalloc=cpputest_malloc -Dfree=cpputest_free
CPPFLAGS =
GCOVFLAGS = -fprofile-arcs -ftest-coverage

LDFLAGS = -lpthread
#USER_LIBS = -lpthread

# This line is overriding the default new macros.  This is helpful
# when using std library includes like <list> and other containers
# so that memory leak detection does not conflict with stl.
CPPUTEST_MEMLEAK_DETECTOR_NEW_MACRO_FILE = -include     ApplicationLib/ExamplesNewOverrides.h
SRC_DIRS = \
    ApplicationLib

TEST_SRC_DIRS = \
    AllTests

INCLUDE_DIRS =\
  .\
  ApplicationLib\
  $(CPPUTEST_HOME)/include\

include $(CPPUTEST_HOME)/build/MakefileWorker.mk

如您所见，pthread lib被提供给带有LDFLAGS的链接器。

有类似经历的人吗？或者可能知道问题出在哪里？将会对任何提示表示感谢！

Answer 1

感谢“基思·马歇尔”和“疯狂科学家”

所以不是LDFLAGS = -lpthread

我使用：

LD_LIBRARIES += -lpthread

并将此行直接放在前面：

include $(CPPUTEST_HOME)/build/MakefileWorker.mk

现在它起作用了。

Answer 2

可以在Catalogue of Built-In Rules中看到

链接单个对象文件的

通过C编译器运行链接器(通常称为ld)，从n.o自动生成n。使用的精确配方是：

$(CC) $(LDFLAGS) n.o $(LOADLIBES) $(LDLIBS)

和Variables Used by Implicit Rules

低版本标志

当编译器应该调用链接器ld (如-L )时，要给它们的额外标志。应该将库(-lfoo)添加到LDLIBS变量中。

因此，在这种情况下，应该将-lpthread设置或添加到LDLIBS，而不是LDFLAGS。