我想尝试在Windows下使用OpenCL。
摘要：当我尝试编译（使用命令gcc my.o -o my.exe -L "C:\Program Files (x86)\AMD APP\lib\x86_64" -l OpenCL）时，出现了"undefined reference to"错误。
我的代码
#include <CL/cl.h>
#include <stdio.h>
int main(void) {
cl_platform_id platform;
int err;
err = clGetPlatformIDs(1, &platform, NULL);
if(err < 0) {
perror("There's No Platform!");
exit(1);
}
/* Some more code... */
system("PAUSE");
}
Makefile
all: addition
addition:
gcc -c -I "C:\Program Files (x86)\AMD APP\include" my.c -o my.o
gcc my.o -o my.exe -L "C:\Program Files (x86)\AMD APP\lib\x86_64" -l OpenCL
使用的程序
- MinGW的
gcc - Visual Studio的
nmake - AMD的OpenCL™ APP SDK（我从中提取了OpenCL库和
CL.h文件）
APP SDK文件夹的结构
%>tree /F "C:\Program Files (x86)\AMD APP\lib\x86_64"
Auflistung der Ordnerpfade
Volumeseriennummer : D2DC-D765
C:\PROGRAM FILES (X86)\AMD APP\LIB\X86_64
libOpenCL.a
OpenCL.lib
OpenVideo64.lib
Es sind keine Unterordner vorhanden
%>tree /F "C:\Program Files (x86)\AMD APP\include"
Auflistung der Ordnerpfade
Volumeseriennummer : D2DC-D765
C:\PROGRAM FILES (X86)\AMD APP\INCLUDE
├───CAL
│ cal.h
│ calcl.h
│ cal_ext.h
│ cal_ext_counter.h
│ cal_ext_d3d10.h
│ cal_ext_d3d9.h
│
├───CL
│ cl.h
│ cl.hpp
│ cl_d3d10.h
│ cl_ext.h
│ cl_gl.h
│ cl_gl_ext.h
│ cl_platform.h
│ opencl.h
│
└───OpenVideo
OpenVideo.h
OVDecode.h
OVDecodeTypes.h
OVEncode.h
OVEncodeTypes.h
错误信息
gcc addition.o -o addition.exe -L "C:\Program Files (x86)\AMD APP\lib\x86_64" -l OpenCL
addition.o:addition.c:(.text+0x2d): undefined reference to `clGetPlatformIDs@12'
addition.o:addition.c:(.text+0x83): undefined reference to `clGetDeviceIDs@24'
addition.o:addition.c:(.text+0xc2): undefined reference to `clGetDeviceIDs@24'
collect2: ld returned 1 exit status
NMAKE : fatal error U1077: "C:\prog-x86\MinGW\bin\gcc.EXE": Rückgabe-Code "0x1"
Stop.
我的问题
我的问题很简单:
- 为什么我的代码不能按照预期编译?
- 我该怎么做才能解决这个问题?
谢谢。
UPDATE: The error message after dropping the spaces like described in @codaddict 's answer.
(Makefile)
all: addition addition: gcc -c -I "C:\prog-x86\AMD-APP\include" addition.c -o addition.o gcc addition.o -o addition.exe -LC:\prog-x86\AMD-APP\lib\x86_64 -lOpenCL(Shelldata)
%>nmake Microsoft (R) Program Maintenance Utility, Version 11.00.50727.1 Copyright (C) Microsoft Corporation. Alle Rechte vorbehalten. gcc -c -I "C:\Program Files (x86)\AMD APP\include" addition.c -o addition.o addition.c: In function 'main': addition.c:14:9: warning: incompatible implicit declaration of built-in function 'exit' [enabled by d efault] addition.c:23:9: warning: incompatible implicit declaration of built-in function 'exit' [enabled by d efault] gcc addition.o -o addition.exe -LC:\prog-x86\AMD-APP\lib\x86_64 -lOpenCL addition.o:addition.c:(.text+0x2d): undefined reference to `clGetPlatformIDs@12' addition.o:addition.c:(.text+0x83): undefined reference to `clGetDeviceIDs@24' addition.o:addition.c:(.text+0xc2): undefined reference to `clGetDeviceIDs@24' collect2: ld returned 1 exit status NMAKE : fatal error U1077: "C:\prog-x86\MinGW\bin\gcc.EXE": Rückgabe-Code "0x1" Stop. %>
gcc对上述命令的响应如下：c:/prog-x86/[...]/mingw32/bin/ld.exe: 无法找到 -lOpenCL-collect2: ld 返回 1 个退出状态。 - fridojetgcc addition.o -o addition.exe -L "C:\Program Files (x86)\AMD APP\lib\x86_64\" -l OpenCL -Wl,-static也没有帮助。undefined reference错误仍然存在。- 您知道我可能如何处理这个问题吗？ - fridojet