编译时重复语法错误
在我的项目中,我需要确定 CPU 支持哪些 SIMD 指令集。问题是,当我尝试进行测试编译时,我收到一系列重复多次的错误,就像编译器多次解析代码一样。确定支持的 SIMD 指令的原因是因为我正在尝试调整 John the Ripper 的 DES 位片实现,以便在 Windows 和 Windows 的 GPGPU(特别是 CUDA)上使用。 Linux。
所以,这是我的错误发生在第 37 行的地方
// File Name: Arch.h
// Purpose: Determine CPU architecture (x86 or x86-64) and to determine instruction set supported by
// the CPU (MMX, SSE2 or neither)
//
// Authors: Daniel Beard and Michael Campbell
//If CPU is x86-64 then use x86-64 include
#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64)
#include "x86-64.h"
#endif
//Determine if CPU architecture is 32-bit, then determine which compiler is being used, finally determine if GCC (GNUC) or MS Visual C++ compiler is being used
#if defined(i386) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) || defined(_M_IX86)
#if defined(__GNUC__)
#define cpuid(func,ax,bx,cx,dx)\
__asm__ __volatile__ ("cpuid":\
"=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func));
int a,b,c,d;
cpuid(0x1,a,b,c,d);
if ((d & 0x17)== 1)
{
#include "x86-mmx.h"
}
else if (d & 0x1A) == 1)
{
#include "x86-sse.h"
}
else if((d & 0x17) != 1 || (d & 0x1A) != 1)
{
#include "x86-any.h"
}
#endif
#if defined(_MSC_VER)
#include<intrin.h>
int CPUInfo[4] = {0};
__cpuid( CPUInfo, 1 );
if( (CPUInfo[3] & 0x1A) == 1 )
{
#include "x86-sse.h"
}
else if( (CPUInfo[3] & 0x17) == 1 )
{
#include "x86-mmx.h"
}
else if( (CPUInfo[3] & 0x17) != 1 || (CPUInfo[3] & 0x1A) != 1 )
{
#include "x86-any.h"
}
#endif
#endif
这是我得到的错误(其中有 86 个,但它们一直重复相同系列的错误/行号):
Error 1 error C2059: syntax error : ',' line 37
Error 2 error C2143: syntax error : missing ')' before 'constant' line 37
Error 3 error C2143: syntax error : missing '{' before 'constant' line 37
Error 4 error C2059: syntax error : '<Unknown>' line 37
Error 5 error C2059: syntax error : ')' line 37
Error 6 error C2059: syntax error : 'if' line 38
Error 7 error C2059: syntax error : 'else' line 42
Error 8 error C2059: syntax error : 'else' line 46
Error 9 error C2374: 'CPUInfo' : redefinition; multiple initialization line 36
In my project I need to determine what SIMD instruction set the CPU supports. The problem is that when I try to do a test compile I get a series of errors that repeat several times like the compiler is parsing the code multiple times. The reason for determining supported SIMD instructions is because I'm trying to adapt John the Ripper's DES bitslice implementation for use on a GPGPU (in particular CUDA) for both Windows & Linux.
So, here's where my error occurs on line 37
// File Name: Arch.h
// Purpose: Determine CPU architecture (x86 or x86-64) and to determine instruction set supported by
// the CPU (MMX, SSE2 or neither)
//
// Authors: Daniel Beard and Michael Campbell
//If CPU is x86-64 then use x86-64 include
#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64)
#include "x86-64.h"
#endif
//Determine if CPU architecture is 32-bit, then determine which compiler is being used, finally determine if GCC (GNUC) or MS Visual C++ compiler is being used
#if defined(i386) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) || defined(_M_IX86)
#if defined(__GNUC__)
#define cpuid(func,ax,bx,cx,dx)\
__asm__ __volatile__ ("cpuid":\
"=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func));
int a,b,c,d;
cpuid(0x1,a,b,c,d);
if ((d & 0x17)== 1)
{
#include "x86-mmx.h"
}
else if (d & 0x1A) == 1)
{
#include "x86-sse.h"
}
else if((d & 0x17) != 1 || (d & 0x1A) != 1)
{
#include "x86-any.h"
}
#endif
#if defined(_MSC_VER)
#include<intrin.h>
int CPUInfo[4] = {0};
__cpuid( CPUInfo, 1 );
if( (CPUInfo[3] & 0x1A) == 1 )
{
#include "x86-sse.h"
}
else if( (CPUInfo[3] & 0x17) == 1 )
{
#include "x86-mmx.h"
}
else if( (CPUInfo[3] & 0x17) != 1 || (CPUInfo[3] & 0x1A) != 1 )
{
#include "x86-any.h"
}
#endif
#endif
Here are the errors I get (there's 86 of them but they repeat same series of errors/line numbers all the way down):
Error 1 error C2059: syntax error : ',' line 37
Error 2 error C2143: syntax error : missing ')' before 'constant' line 37
Error 3 error C2143: syntax error : missing '{' before 'constant' line 37
Error 4 error C2059: syntax error : '<Unknown>' line 37
Error 5 error C2059: syntax error : ')' line 37
Error 6 error C2059: syntax error : 'if' line 38
Error 7 error C2059: syntax error : 'else' line 42
Error 8 error C2059: syntax error : 'else' line 46
Error 9 error C2374: 'CPUInfo' : redefinition; multiple initialization line 36
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您的第一个错误位于第36行 - 声称
CPUInfo
已存在 - 首先修复该错误,其余的可能会消失。在 Visual Studio 选项中,转到“项目和解决方案”、“常规”并取消选中“始终显示错误列表...”,
这将为您留下输出窗口 - 您可以使用 F8 导航到第一个警告/错误是您通常应该关心的人。
Your first error is at line 36 - claiming a
CPUInfo
already exists - Fix that first and the rest may go away.In visual studio options, go to "Projects And Solutions", "General" and uncheck "Always show Error List ..."
That'll leave you with the output window - you can use F8 to navigate to the first warning/error which is the one you normally should care about.