[英]Linking to curl from C++ on M1 Mac - undefined symbols for arm64
我有一个在 Windows 和 Linux 上的现有项目。 我最近第一次获得了 Mac,我正在尝试将其设置为 C++ 开发,但我相信我在链接到 curl 时遇到问题。
据我所知,curl 通过自制软件支持基于 M1 arm 的芯片,我使用homebrew install curl
。
下面是我的制作文件
SOURCES = DataDogStatsD.cpp DDEvent.cpp Helpers.cpp
lib_name = libDataDogStatsD.so.1.1.0.5
curl_include = /usr/local/include/curl
rapidjson_inc_path = /usr/local/include/rapidjson
OBJECTS = $(SOURCES:.cpp=.o)
CFLAGS = -fpic -c $(SOURCES) -Wall -g -Iinclude -std=c++11 -I/usr/include -I$(curl_include) -I$(rapidjson_inc_path)
CC = g++
LDFLAGS = -lpthread -pthread -lm -L/opt/homebrew/opt/curl/lib
.PHONY: clean
default:
$(CC) -shared -Wl,-install_name,libDataDogStatsD.so.1 -o $(lib_name) $(OBJECTS) $(LDFLAGS)
ln -sf $(lib_name) libDataDogStatsD.so
clean:
rm -vf $(OBJECTS) depend $(lib_name)
depend: $(SOURCES)
$(CC) $(CFLAGS) > depend
-include depend
当我运行 make 时,我得到以下信息:
g++ -fpic -c DataDogStatsD.cpp DDEvent.cpp Helpers.cpp -Wall -g -Iinclude -std=c++11 -I/usr/include -I/usr/local/include/curl -I/usr/local/include/rapidjson > depend
g++ -shared -Wl,-install_name,libDataDogStatsD.so.1 -o libDataDogStatsD.so.1.1.0.5 DataDogStatsD.o DDEvent.o Helpers.o -lpthread -pthread -lm -L/opt/homebrew/opt/curl/lib
Undefined symbols for architecture arm64:
"_curl_easy_cleanup", referenced from:
DataDogStatsD::event(DDEvent, bool, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
DataDogStatsD::sendDDEventinthread(DDEvent, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
"_curl_easy_getinfo", referenced from:
DataDogStatsD::event(DDEvent, bool, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
DataDogStatsD::sendDDEventinthread(DDEvent, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
"_curl_easy_init", referenced from:
DataDogStatsD::initCurl(DDEvent, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, curl_slist*, char const*) in DataDogStatsD.o
"_curl_easy_perform", referenced from:
DataDogStatsD::event(DDEvent, bool, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
DataDogStatsD::sendDDEventinthread(DDEvent, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
"_curl_easy_setopt", referenced from:
DataDogStatsD::initCurl(DDEvent, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, curl_slist*, char const*) in DataDogStatsD.o
"_curl_easy_strerror", referenced from:
DataDogStatsD::event(DDEvent, bool, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
DataDogStatsD::sendDDEventinthread(DDEvent, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
"_curl_slist_append", referenced from:
DataDogStatsD::initCurl(DDEvent, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, curl_slist*, char const*) in DataDogStatsD.o
"_curl_slist_free_all", referenced from:
DataDogStatsD::event(DDEvent, bool, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
DataDogStatsD::sendDDEventinthread(DDEvent, void (*)(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)) in DataDogStatsD.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [default] Error 1
我已经尝试将 -arch 设置为 x86_64 作为对 LDFLAGS 的测试,然后它成功编译并创建了库,但我真的不认为我应该在应该为 M1 构建 x86_64 时构建它,并且因此更快,因为它不必通过罗塞塔 go。
如果我运行lipo -info /opt/homebrew/opt/curl/bin/curl
来检查库的体系结构,我会得到以下信息:
Non-fat file: /opt/homebrew/opt/curl/bin/curl is architecture: arm64
所以 curl 看起来是正确的,所以不知道为什么我收到错误 undefined symbols for arm64
我在您的 makefile 中没有看到对curl
库的任何引用。 要纠正这个问题,您(可能)需要将-lcurl
添加到您的LDFLAGS
中。
此外, /opt/homebrew/opt/curl/bin/curl
是 curl 可执行文件,而不是库。 那是(可能) /opt/homebrew/opt/curl/lib/libcurl.so
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