c++ - cmake 和 libcxx 的链接器错误-6ren

c++ - cmake 和 libcxx 的链接器错误

转载作者：行者123 更新时间：2023-11-27 22:37:54

背景

llvm、clang、libcxx/libcxxabi 是我从源代码构建的。它们位于 usr/local。

最小源文件

//findpath.cpp

#include <iostream>
int main(){
    std::cout << "Hi";
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.6)
set(CMAKE_CXX_COMPILER "clang++")
set(CMAKE_C_COMPILER "clang")

project(FindPath)
add_compile_options("-stdlib=libc++" "-lc++abi" "-v")

add_executable(path findpath.cpp)

使用cmake(输出链接器错误)

~/.../findpath/build >>> cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=1 ..                                                                                                ±[●][master]
-- The C compiler identification is Clang 8.0.0
-- The CXX compiler identification is Clang 8.0.0
-- Check for working C compiler: /usr/local/bin/clang
-- Check for working C compiler: /usr/local/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/local/bin/clang++
-- Check for working CXX compiler: /usr/local/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/firstlove/projects/smalltools/findpath/build
~/.../findpath/build >>> make                                                                                                                                      ±[●][master]
Scanning dependencies of target path
[ 50%] Building CXX object CMakeFiles/path.dir/findpath.cpp.o
clang version 8.0.0 (http://llvm.org/git/clang 55ead9f6f66545bcfda4a0f7e6dd3748a296f826) (https://github.com/llvm-mirror/llvm.git 8d97f0d4be38ebd4b38fe2cff51e0713b3dfba66)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1
Found candidate GCC installation: /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1
Selected GCC installation: /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
clang-8: warning: -lc++abi: 'linker' input unused [-Wunused-command-line-argument]
 "/usr/local/bin/clang-8" -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name findpath.cpp -mr
elocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column
-info -debugger-tuning=gdb -v -coverage-notes-file /home/firstlove/projects/smalltools/findpath/build/CMakeFiles/path.dir/findpath.cpp.gcno -resource-dir /usr/local/lib/clang/8
.0.0 -internal-isystem /usr/local/bin/../include/c++/v1 -internal-isystem /usr/local/include -internal-isystem /usr/local/lib/clang/8.0.0/include -internal-externc-isystem /inc
lude -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir /home/firstlove/projects/smalltools/findpath/build -ferror-limit 19 -fmessage-length 176 
-fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o CMakeFiles/path.dir/findpath.cpp.o -x c++ /home/firstlove/projects/smalltools/
findpath/findpath.cpp -faddrsig
clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/bin/../include/c++/v1
 /usr/local/include
 /usr/local/lib/clang/8.0.0/include
 /usr/include
End of search list.
[100%] Linking CXX executable path
CMakeFiles/path.dir/findpath.cpp.o: In function `main':
findpath.cpp:(.text+0xa): undefined reference to `std::__1::cout'
CMakeFiles/path.dir/findpath.cpp.o: In function `std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<cha
r> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long)':
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x2f): undefined reference to `std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::sentry(std::__1::basic_ostream<char, st
d::__1::char_traits<char> >&)'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x1be): undefined reference to `std::__1::ios_base::getloc() const'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x1d4): undefined reference to `std::__1::ctype<char>::id'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x1d9): undefined reference to `std::__1::locale::use_facet(std::__1::locale::id&) const'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x235): undefined reference to `std::__1::locale::~locale()'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x257): undefined reference to `std::__1::locale::~locale()'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x327): undefined reference to `std::__1::ios_base::clear(unsigned int)'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x384): undefined reference to `std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::~sentry()'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x3ad): undefined reference to `std::__1::ios_base::__set_badbit_and_consider_rethrow()'
findpath.cpp:(.text._ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m[_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEER
NS_13basic_ostreamIT_T0_EES7_PKS4_m]+0x3d8): undefined reference to `std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::~sentry()'
CMakeFiles/path.dir/findpath.cpp.o: In function `std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> > std::__1::__pad_and_output<char, std::__1::char_traits<char> 
>(std::__1::ostreambuf_iterator<char, std::__1::char_traits<char> >, char const*, char const*, char const*, std::__1::ios_base&, char)':
findpath.cpp:(.text._ZNSt3__116__pad_and_outputIcNS_11char_traitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_[_ZNSt3__116__pad_and_outputIcNS_11char_tr
aitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_]+0x219): undefined reference to `std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::a
llocator<char> >::__init(unsigned long, char)'
findpath.cpp:(.text._ZNSt3__116__pad_and_outputIcNS_11char_traitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_[_ZNSt3__116__pad_and_outputIcNS_11char_tr
aitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_]+0x388): undefined reference to `std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::a
llocator<char> >::~basic_string()'
findpath.cpp:(.text._ZNSt3__116__pad_and_outputIcNS_11char_traitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_[_ZNSt3__116__pad_and_outputIcNS_11char_tr
aitsIcEEEENS_19ostreambuf_iteratorIT_T0_EES6_PKS4_S8_S8_RNS_8ios_baseES4_]+0x3a3): undefined reference to `std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::a
llocator<char> >::~basic_string()'
clang-8: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [CMakeFiles/path.dir/build.make:84: path] Error 1
make[1]: *** [CMakeFiles/Makefile2:73: CMakeFiles/path.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

没有 cmake(无链接错误):`clang++ -stdlib=libc++ -lc++abi -std=c++17 -v findpath.cpp`

~/.../smalltools/findpath >>> clang++ -stdlib=libc++ -lc++abi -std=c++17 -v findpath.cpp                                                                           ±[●][master]
clang version 8.0.0 (http://llvm.org/git/clang 55ead9f6f66545bcfda4a0f7e6dd3748a296f826) (https://github.com/llvm-mirror/llvm.git 8d97f0d4be38ebd4b38fe2cff51e0713b3dfba66)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/8.1.1
Found candidate GCC installation: /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1
Selected GCC installation: /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
 "/usr/local/bin/clang-8" -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name findpath.cpp -mr
elocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column
-info -debugger-tuning=gdb -v -resource-dir /usr/local/lib/clang/8.0.0 -internal-isystem /usr/local/bin/../include/c++/v1 -internal-isystem /usr/local/include -internal-isystem
 /usr/local/lib/clang/8.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/firstl
ove/projects/smalltools/findpath -ferror-limit 19 -fmessage-length 176 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/fi
ndpath-7dd1ae.o -x c++ findpath.cpp -faddrsig
clang -cc1 version 8.0.0 based upon LLVM 8.0.0svn default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/bin/../include/c++/v1
 /usr/local/include
 /usr/local/lib/clang/8.0.0/include
 /usr/include
End of search list.
 "/usr/bin/ld" --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../../../lib64/crt1.o /usr/lib64/gc
c/x86_64-pc-linux-gnu/8.1.1/../../../../lib64/crti.o /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1/crtbegin.o -L/usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1 -L/usr/lib64/gcc/x86_64-pc-l
inux-gnu/8.1.1/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../.. -L/usr/local/bin/../lib -L/lib -L/usr/lib -lc++abi /tmp
/findpath-7dd1ae.o -lc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1/crtend.o /usr/lib64/gcc/x86_64-pc-linux-gnu/8.1.1/../../../../lib64/crtn.o

但是从/usr/bin/ld来看，好像是用gcc链接的？

我谷歌了很多，但没有找到有用的东西。如果需要更多信息，请告诉我，在此先感谢。

更新

我也试过set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++ -lc++abi") , 但仍然弹出相同的链接器错误。
为了验证问题是否出自构建 llvm、clang、libcxx、libcxxabi 的源代码，我重新安装了 os 并从 pacman 安装。，不幸的是，没有任何改变。
使用 VERBOSE=1 使:https://paste.ubuntu.com/p/t5yycfdmsc/

除了告诉我链接器是gnu的ld，其他报错信息都是一样的。

然后我试试 llvm 的 lld，

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=lld -stdlib=libc++ -lc++abi")

/usr/bin/cmake -H/home/firstlove/projects/smallProjects/smalltools/findpath -B/home/firstlove/projects/smallProjects/smalltools/findpath/build --check-build-system CMakeFiles/M
akefile.cmake 0                                                                                                                                                                
/usr/bin/cmake -E cmake_progress_start /home/firstlove/projects/smallProjects/smalltools/findpath/build/CMakeFiles /home/firstlove/projects/smallProjects/smalltools/findpath/bu
ild/CMakeFiles/progress.marks                                                                                                                                                  
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
make -f CMakeFiles/path.dir/build.make CMakeFiles/path.dir/depend
make[2]: Entering directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
cd /home/firstlove/projects/smallProjects/smalltools/findpath/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/firstlove/projects/smallProjects/smalltools/findpa
th /home/firstlove/projects/smallProjects/smalltools/findpath /home/firstlove/projects/smallProjects/smalltools/findpath/build /home/firstlove/projects/smallProjects/smalltools
/findpath/build /home/firstlove/projects/smallProjects/smalltools/findpath/build/CMakeFiles/path.dir/DependInfo.cmake --color=                                                 
make[2]: Leaving directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
make -f CMakeFiles/path.dir/build.make CMakeFiles/path.dir/build
make[2]: Entering directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
[ 50%] Linking CXX executable path
/usr/bin/cmake -E cmake_link_script CMakeFiles/path.dir/link.txt --verbose=1
clang++     -fuse-ld=lld -stdlib=libc++ -lc++abi CMakeFiles/path.dir/findpath.cpp.o  -o path 
/usr/bin/ld.lld: error: undefined symbol: std::cout
>>> referenced by findpath.cpp
>>>               CMakeFiles/path.dir/findpath.cpp.o:(main)

/usr/bin/ld.lld: error: undefined symbol: std::basic_ostream<char, std::char_traits<char> >& std::operator<<<std::char_traits<char> >(std::basic_ostream<char, std::char_traits<
char> >&, char const*)                                                                                                                                                         
>>> referenced by findpath.cpp
>>>               CMakeFiles/path.dir/findpath.cpp.o:(main)

/usr/bin/ld.lld: error: undefined symbol: std::ios_base::Init::Init()
>>> referenced by findpath.cpp
>>>               CMakeFiles/path.dir/findpath.cpp.o:(__cxx_global_var_init)

/usr/bin/ld.lld: error: undefined symbol: std::ios_base::Init::~Init()
>>> referenced by findpath.cpp
>>>               CMakeFiles/path.dir/findpath.cpp.o:(__cxx_global_var_init)
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [CMakeFiles/path.dir/build.make:84: path] Error 1
make[2]: Leaving directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/path.dir/all] Error 2
make[1]: Leaving directory '/home/firstlove/projects/smallProjects/smalltools/findpath/build'
make: *** [Makefile:84: all] Error 2

糟糕，类似的链接器错误...

同样，没有 cmake，它工作正常:

~/.../smalltools/findpath >>> clang++ -stdlib=libc++ -lc++abi -std=c++17 -v -fuse-ld=lld findpath.cpp                                                            ±[A1●][master]
clang version 6.0.1 (tags/RELEASE_601/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0
Found candidate GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0
Found candidate GCC installation: /usr/lib64/gcc/x86_64-pc-linux-gnu/8.2.0
Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
 "/usr/bin/clang-6.0" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name findpath.cpp -mrelocation
-model pic -pic-level 2 -pic-is-pie -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 
-dwarf-column-info -debugger-tuning=gdb -v -resource-dir /usr/lib/clang/6.0.1 -internal-isystem /usr/bin/../include/c++/v1 -internal-isystem /usr/local/include -internal-isyste
m /usr/lib/clang/6.0.1/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/firstlove/p
rojects/smallProjects/smalltools/findpath -ferror-limit 19 -fmessage-length 176 -stack-protector 2 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -f
color-diagnostics -o /tmp/findpath-671136.o -x c++ findpath.cpp                                                                                                                
clang -cc1 version 6.0.1 based upon LLVM 6.0.1 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../include/c++/v1
 /usr/local/include
 /usr/lib/clang/6.0.1/include
 /usr/include
End of search list.
 "/usr/bin/ld.lld" -pie --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib64/Scrt
1.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib64/crti.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/crtbeginS.o -L/usr/bin/../lib64/gcc/x86_64-pc-linux
-gnu/8.2.0 -L/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib64 -L/usr/bin/../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/bin/../lib64/gcc/x86_64-pc-linux-g
nu/8.2.0/../../.. -L/usr/bin/../lib -L/lib -L/usr/lib -lc++abi /tmp/findpath-671136.o -lc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/
crtendS.o /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../lib64/crtn.o                                                                                             
~/.../smalltools/findpath >>>                                                                                                                                   ±[A1●●][master]
~/.../smalltools/findpath >>> ./a.out                                                                                                                           ±[A1●●][master]
Hi%

最佳答案

@jonathon在 my this question 中解决此问题.

解决方案是同时设置编译器和链接器选项，以便它可以找到 libc++:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++ -v")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++ -lc++abi")

关于c++ - cmake 和 libcxx 的链接器错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51904938/

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c++ - libcxx 中的可选 std::nullopt_t 实现
Clang 以这种方式实现 std::nullopt_t: struct nullopt_t { explicit constexpr nullopt_t(int) noexcept {} }
linux - 使用 clang++ 时默认启用 libc++/libcxx
我按照说明从头开始安装 clang here .之后，我根据说明 here 使用 libsupc++ 安装了 libc++ . 现在，每当我使用 clang 和 libc++ 编译和链接程序时，我都需
c++ - 使用带有 libcxx 的套接字函数 bind() 编译代码失败
我正在使用新的 libcxx 库，并且我有一个调用套接字函数的代码 bind() .问题是当我输入 using namespace std;编译器给了我以下代码的错误: int res = bind(
c++ - std::thread::join 在 libcxx 中实现在哪里
我想知道在哪里std::thread::join在 libcxx 中实现。虽然它在中声明header，好像没有定义。我什至查看了 libcxxabi，但也找不到它。那么有人可以指出它是在哪里实现
c++ - 构建 Clang 时未知包 libcxx 和 libcxxabi？
我正在尝试使用来自源代码的 libc++ 构建 Clang。我试图在树外将 libc++ 与其他组件构建在一起。我使用的食谱如下。如果我只是将 libcxx 和 libcxxabi 放在树中，那么配
c++ - 为什么经过地址清理的 C++ 库构建会在 libcxx 类中产生不可重现的 ASAN 问题？
当使用 -fsanitize=address 构建时，我有时会看到来自 libc++ 类的错误内存访问问题。这些错误在每次运行中似乎都不会重复，有时甚至根本不会发生。发生了什么事？我怎样才能避免这
c++ - 为什么 libcxx 中的 __dependent_type 使用模板非类型参数 bool _Dummy？
这里是 __dependent_type 的定义: template struct _LIBCPP_TEMPLATE_VIS __dependent_type : public _Tp {}; 所有
c++ - 为什么 libcxx 应用 __forceinline 或 GCC 等效于它已经隐藏的内联函数？
我想确切地理解为什么内联函数的 libc++ 可见性宏使用 __forceinline 或 __attribute__((__always_inline__)) 作为它关联的属性的一部分内联函数。背
c++ - 如何在 CentOS 7 上通过 clang 构建 libcxx 和 libcxxabi
我想在 CentOS 7 上使用带有 clang/clang++ 的 C++11 或 C++14。如何构建这个构建环境？最佳答案本文讲授如何在 CentOS 7 上构建 C++11 构建环境:RH

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c++ - cmake 和 libcxx 的链接器错误

背景

最小源文件

CMakeLists.txt

使用cmake(输出链接器错误)

没有 cmake(无链接错误):`clang++ -stdlib=libc++ -lc++abi -std=c++17 -v findpath.cpp`

更新

首页

博学

6Ren·AI

商城

c++ - cmake 和 libcxx 的链接器错误

背景

最小源文件

CMakeLists.txt

使用cmake(输出链接器错误)

没有 cmake(无链接错误):clang++ -stdlib=libc++ -lc++abi -std=c++17 -v findpath.cpp

更新

没有 cmake(无链接错误):`clang++ -stdlib=libc++ -lc++abi -std=c++17 -v findpath.cpp`