durante la creazione di GTest

Question

Stavo cercando di configurare l'ambiente GTest sulla mia macchina Ubuntu. ma rendendo il GTEST per ottenere la biblioteca, ottengo il seguente errore ...

som@som-VPCEH25EN:~/Workspace/CPP/gtest-1.6.0/make$ make 
g++ -I../include -g -Wall -Wextra -lpthread sample1.o sample1_unittest.o gtest_main.a -o sample1_unittest 
gtest_main.a(gtest-all.o): In function `~ThreadLocal': 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1336: undefined reference to `pthread_getspecific' 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1340: undefined reference to `pthread_key_delete' 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1336: undefined reference to `pthread_getspecific' 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1340: undefined reference to `pthread_key_delete' 
gtest_main.a(gtest-all.o): In function `testing::internal::ThreadLocal<std::vector<testing::internal::TraceInfo, std::allocator<testing::internal::TraceInfo> > >::GetOrCreateValue() const': 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1372: undefined reference to `pthread_getspecific' 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1379: undefined reference to `pthread_setspecific' 
gtest_main.a(gtest-all.o): In function `testing::internal::ThreadLocal<testing::TestPartResultReporterInterface*>::CreateKey()': 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1365: undefined reference to `pthread_key_create' 
gtest_main.a(gtest-all.o): In function `testing::internal::ThreadLocal<std::vector<testing::internal::TraceInfo, std::allocator<testing::internal::TraceInfo> > >::CreateKey()': 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1365: undefined reference to `pthread_key_create' 
gtest_main.a(gtest-all.o): In function `testing::internal::ThreadLocal<testing::TestPartResultReporterInterface*>::GetOrCreateValue() const': 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1372: undefined reference to `pthread_getspecific' 
/home/som/Workspace/CPP/gtest-1.6.0/make/../include/gtest/internal/gtest-port.h:1379: undefined reference to `pthread_setspecific' 
collect2: ld returned 1 exit status 
make: *** [sample1_unittest] Error 1 

Answer 1

Provare a spostare -lpthread a dopo gtest_main.a al comando vostro g ++.

Answer 2

Metti "-L/usr/local/$ (uname -m) -linux-gnu" nei tuoi LDFLAG e "-pthread" nella riga di comando del linker (ld). (Sì, è -pthread, non -lpthread)

Answer 3

Hai visto Erik Smistad's excellent tutorial su come iniziare w/gtest su Ubuntu? Ho appena provato su (K) Ubuntu 12.04 e ha funzionato perfettamente. In breve, ciò che devi fare è

sudo apt-get install cmake libgtest-dev 
cd /usr/src/gtest 
sudo cmake CMakeLists.txt 
sudo make 
sudo cp *.a /usr/lib 

Se vi sentite a disagio make esecuzione e CMake come root, dovresti copiare/usr/src/GTEST ad una directory scrivibile dal tuo utente. Nel tutorial, Erik fornisce anche un test di esempio con un CMakeLists.txt per costruirlo.

Answer 4

Ho avuto lo stesso problema e ho modificato -lpthread nel Makefile su -pthread. (Ho abbandonato la piccola 'L'.) Dopo di che una 'make' è stata compilata senza errori.

Answer 5

File in gtest-1.6.0/make Si dovrebbe avere Makefile vedere di seguito come dovrebbe apparire. La differenza è sull'ultima riga

# A sample Makefile for building Google Test and using it in user 
# tests. Please tweak it to suit your environment and project. You 
# may want to move it to your project's root directory. 
# 
# SYNOPSIS: 
# 
# make [all] - makes everything. 
# make TARGET - makes the given target. 
# make clean - removes all files generated by make. 

# Please tweak the following variable definitions as needed by your 
# project, except GTEST_HEADERS, which you can use in your own targets 
# but shouldn't modify. 

# Points to the root of Google Test, relative to where this file is. 
# Remember to tweak this if you move this file. 
GTEST_DIR = .. 

# Where to find user code. 
USER_DIR = ../samples 

# Flags passed to the preprocessor. 
CPPFLAGS += -I$(GTEST_DIR)/include 

# Flags passed to the C++ compiler. 
CXXFLAGS += -g -Wall -Wextra 

# All tests produced by this Makefile. Remember to add new tests you 
# created to the list. 
TESTS = sample1_unittest 

# All Google Test headers. Usually you shouldn't change this 
# definition. 
GTEST_HEADERS = $(GTEST_DIR)/include/gtest/*.h \ 
       $(GTEST_DIR)/include/gtest/internal/*.h 

# House-keeping build targets. 

all : $(TESTS) 

clean : 
    rm -f $(TESTS) gtest.a gtest_main.a *.o 

# Builds gtest.a and gtest_main.a. 

# Usually you shouldn't tweak such internal variables, indicated by a 
# trailing _. 
GTEST_SRCS_ = $(GTEST_DIR)/src/*.cc $(GTEST_DIR)/src/*.h $(GTEST_HEADERS) 

# For simplicity and to avoid depending on Google Test's 
# implementation details, the dependencies specified below are 
# conservative and not optimized. This is fine as Google Test 
# compiles fast and for ordinary users its source rarely changes. 
gtest-all.o : $(GTEST_SRCS_) 
    $(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \ 
      $(GTEST_DIR)/src/gtest-all.cc 

gtest_main.o : $(GTEST_SRCS_) 
    $(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \ 
      $(GTEST_DIR)/src/gtest_main.cc 

gtest.a : gtest-all.o 
    $(AR) $(ARFLAGS) $@ $^ 

gtest_main.a : gtest-all.o gtest_main.o 
    $(AR) $(ARFLAGS) $@ $^ 

# Builds a sample test. A test should link with either gtest.a or 
# gtest_main.a, depending on whether it defines its own main() 
# function. 

sample1.o : $(USER_DIR)/sample1.cc $(USER_DIR)/sample1.h $(GTEST_HEADERS) 
    $(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sample1.cc 

sample1_unittest.o : $(USER_DIR)/sample1_unittest.cc \ 
        $(USER_DIR)/sample1.h $(GTEST_HEADERS) 
    $(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sample1_unittest.cc 

sample1_unittest : sample1.o sample1_unittest.o gtest_main.a 
    $(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ -o $@ -lpthread #<----------------------- DIFF 

Quindi, per favore, esegui make in questo elenco :) e sii felice.