带有-mavx标志的链接器错误GCC7

Question

编译英特尔AVX扩展中使用gcc7或clang的256位向量数据类型（__m256d）失败。我能够编译和使用128位向量（不带-mavx标志）。但是，只要我尝试avx矢量，或者找不到一些汇编器命令定义（GCC7）或者存在链接器错误（clang）。我使用端口来安装所有编译器或软件包。

程序：

#include <iostream> 
#include <emmintrin.h> 
#include <immintrin.h> 
#include <pmmintrin.h> 
#include <xmmintrin.h> 

struct cpx256 { 
    union { 
     struct { 
      double r1, i1, r2, i2; 
     }; 
     __m256d v; 
    }; 
    cpx256(double r1_in, double i1_in, double r2_in, double i2_in) : 
     r1(r1_in), i1(i1_in), r2(r2_in), i2(i2_in){} 
}; 

std::ostream & operator<< (std::ostream & os, cpx256 cmplx) { 
    os << cmplx.r1; 
    (cmplx.i1 > 0) ? (os << "+" << cmplx.i1 << "j") : (os << cmplx.i1 << "j"); 
    os << " | "; 
    os << cmplx.r2; 
    (cmplx.i2 > 0) ? (os << "+" << cmplx.i2 << "j") : (os << cmplx.i2 << "j"); 
    return os; 
} 

int main(){ 
    cpx256 b = cpx256(1,2, 3, 4); 
    std::cout << b << std::endl; 
    return 0; 
} 

与gcc7：

g++ -std=c++11 -Wall -Wextra -mtune=native -ffast-math -fverbose-asm -mavx avx.cpp 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:57:no such instruction: `vmovsd %xmm0, -16(%rbp)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:58:no such instruction: `vmovsd %xmm1, -24(%rbp)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:59:no such instruction: `vmovsd %xmm2, -32(%rbp)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:60:no such instruction: `vmovsd %xmm3, -40(%rbp)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:63:no such instruction: `vmovsd -16(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:64:no such instruction: `vmovsd %xmm0, (%rax)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:66:no such instruction: `vmovsd -24(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:67:no such instruction: `vmovsd %xmm0, 8(%rax)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:69:no such instruction: `vmovsd -32(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:70:no such instruction: `vmovsd %xmm0, 16(%rax)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:72:no such instruction: `vmovsd -40(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:73:no such instruction: `vmovsd %xmm0, 24(%rax)' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:99:no such instruction: `vmovd %rdx, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:103:no such instruction: `vmovsd 24(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:104:no such instruction: `vxorpd %xmm1, %xmm1,%xmm1' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:105:no such instruction: `vcomisd %xmm1, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:113:no such instruction: `vmovd %rax, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:123:no such instruction: `vmovd %rdx, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:138:no such instruction: `vmovd %rdx, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:142:no such instruction: `vmovsd 40(%rbp), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:143:no such instruction: `vxorpd %xmm1, %xmm1,%xmm1' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:144:no such instruction: `vcomisd %xmm1, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:152:no such instruction: `vmovd %rax, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:162:no such instruction: `vmovd %rdx, %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:190:no such instruction: `vmovsd lC4(%rip), %xmm2' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:191:no such instruction: `vmovsd lC5(%rip), %xmm1' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:192:no such instruction: `vmovsd lC6(%rip), %xmm0' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:195:no such instruction: `vmovapd %xmm2, %xmm3' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:196:no such instruction: `vmovapd %xmm1, %xmm2' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:197:no such instruction: `vmovapd %xmm0, %xmm1' 
/var/folders/06/hdqdxlh14czcvkk4t55894y80000gn/T//ccXFPOnA.s:198:no such instruction: `vmovd %rdx, %xmm0' 

铿锵我得到一个链接错误：

clang -std=c++11 -Wall -Wextra -mtune=native -ffast-math -fverbose-asm -mavx avx.cpp 
Undefined symbols for architecture x86_64: 
    "std::__1::__basic_string_common<true>::__throw_length_error() const", referenced from: 
     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) in avx-dfd779.o 
    "std::__1::locale::use_facet(std::__1::locale::id&) const", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::ios_base::getloc() const", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::~basic_string()", referenced from: 
     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) in avx-dfd779.o 
    "std::__1::basic_ostream<char, std::__1::char_traits<char> >::put(char)", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
    "std::__1::basic_ostream<char, std::__1::char_traits<char> >::flush()", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
    "std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::sentry(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::~sentry()", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::basic_ostream<char, std::__1::char_traits<char> >::operator<<(double)", referenced from: 
     operator<<(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, cpx256) in avx-dfd779.o 
    "std::__1::cout", referenced from: 
     _main in avx-dfd779.o 
    "std::__1::ctype<char>::id", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::locale::~locale()", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::ios_base::__set_badbit_and_consider_rethrow()", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::__1::ios_base::clear(unsigned int)", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "std::terminate()", referenced from: 
     ___clang_call_terminate in avx-dfd779.o 
    "operator new(unsigned long)", referenced from: 
     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) in avx-dfd779.o 
    "___cxa_begin_catch", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
     ___clang_call_terminate in avx-dfd779.o 
    "___cxa_end_catch", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
    "___gxx_personality_v0", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in avx-dfd779.o 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::__put_character_sequence<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*, unsigned long) in avx-dfd779.o 
     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) in avx-dfd779.o 
     Dwarf Exception Unwind Info (__eh_frame) in avx-dfd779.o 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

锵：

clang version 4.0.1 (tags/RELEASE_401/final) 
Target: x86_64-apple-darwin16.6.0 
Thread model: posix 
InstalledDir: /opt/local/libexec/llvm-4.0/bin 

GCC7：

g++ (MacPorts gcc7 7-20170622_0) 7.1.1 20170622 

我的笔记本电脑CPU：2.8 GHz的英特尔酷睿i7（应支持AVX）的Mac OS塞拉利昂10.12.5

我还与港口更新我的连接（ld64，最新274.2 ）并安装并激活mp-clang-4.0。有任何想法吗？

Answer 1

同时我再次检查了clang调用，发现调用C而不是C++编译器的非常愚蠢的错误。所以这个最小调用编译并没有错误，执行：

clang++ -std=c++11 -mavx ../tests/sse_tests.cpp 

不过，对于GCC++版本汇编似乎并没有被正确链接，我不知道该如何检查。