一步一步写一个简单通用的makefile(三)

上一篇一步一步写一个简单通用的makefile(二) 里面的makefile 实现对通用的代码进行编译，这一章我将会对上一次的makefile 进行进一步的优化.

优化后的makefile:

#Hellomake
#Magnum， 2014-10-20
# 指令编译器和选项
CC=gcc
CFLAGS=-Wall
# 需要链接库的库名，比如libm.a，就是-lm,需要去掉前面的lib和后面的.a
LIBS=-lm
# 设置默认搜索头文件的路径，优先是这个，然后是系统路径
IncludeDir = -I./include/
# 需要链接的库的路径
LinkDir = #-L
OBJ_DIR = ./obj
BIN_DIR = ./bin

#PROJECT_TOP_DIR  设置成pwd 或者"./"都行
PROJECT_TOP_DIR=$(shell pwd)#$(shell cd ../; pwd)
PROJECT_BIN_DIR=$(PROJECT_TOP_DIR)/bin
PROJECT_SRC_DIR=$(PROJECT_TOP_DIR)/src
PROJECT_LIB_DIR=$(PROJECT_TOP_DIR)/lib
PROJECT_OBJ_DIR=$(PROJECT_TOP_DIR)/objs
MKDIR := mkdir -p

# 目标文件
EXE_NAME=hellomake
TARGET=$(BIN_DIR)/$(EXE_NAME)

#源文件的文件类型
FILE_TYPE=c
src=$(wildcard $(PROJECT_SRC_DIR)/*.$(FILE_TYPE))
dir= $(notdir $(src))
PROJECT_OBJ= $(patsubst %.$(FILE_TYPE),%.o,$(dir) )
PROJECT_ALL_OBJS= $(addprefix $(PROJECT_OBJ_DIR)/, $(PROJECT_OBJ))

all: chdir $(TARGET)
    @echo "magnum $(PROJECT_OBJ)"
    @echo "magnum $(PROJECT_OBJ_DIR)"
    @echo "magnum $(PROJECT_ALL_OBJS)"

$(TARGET): $(PROJECT_ALL_OBJS)
    $(CC) -o $@ $^ $(LinkDir) $(LIBS) 

chdir:
    @if test ! -d $(PROJECT_OBJ_DIR) ; 
        then 
        mkdir $(PROJECT_OBJ_DIR) ; 
    fi

    @if test ! -d $(PROJECT_BIN_DIR) ; 
        then 
        mkdir $(PROJECT_BIN_DIR) ; 
    fi

.PHONY : clean
clean:
    -rm -rf $(PROJECT_BIN_DIR) $(PROJECT_OBJ_DIR) 

$(PROJECT_OBJ_DIR)/%.o:$(PROJECT_SRC_DIR)/%.$(FILE_TYPE)
    $(CC) $(CFLAGS) -o $@ -c $< $(IncludeDir)

这个优化后的makefile 对于一般需要写一个小的测试程序都有一定的通用性，如果需要对新的程序进行修改：
1. 编译类型C用gcc, c++用g++

2. 源文件的路径 PROJECT_SRC_DIR

3. 文件类型c 还是cpp

4. 还有这三个：

# 需要链接库的库名，比如libm.a，就是-lm,需要去掉前面的lib和后面的.a
LIBS=-lm
# 设置默认搜索头文件的路径，优先是这个，然后是系统路径
IncludeDir = -I./include/
# 需要链接的库的路径
LinkDir = #-L

下面我就用这个模板去编译一个opencl的小程序。

文件树如下：

.
├── convolve.cl
├── convolve_cl.cpp
├── makefile
└── makefile~

很简单的只有3个文件， convolve.cl, convolve_cl.cpp, makefile.

convolve_cl.cpp源码：

// newTutorial1.cpp : Defines the entry point for the console application.
//

//#include "stdafx.h"
#include <CL/cl.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <iostream>
#include <fstream>
#include <string.h>
#include <string>
#include <pthread.h>
using namespace std;
#pragma comment (lib,"OpenCL.lib")

#define WIDTH 1920
#define HEIGHT 1080
#define FRAMES 1
typedef unsigned char   uint8_t;

static double now_ms(void) {
  struct timespec res;
  clock_gettime(CLOCK_REALTIME, &res);
  return 1000.0 * res.tv_sec + (double) res.tv_nsec / 1e6;
}


static int filter0(uint8_t *src, uint8_t *dst, uint8_t *ocl, int w, int h) {
  printf("filter 0 ,w=%d, h=%d
",w, h);
  double start, end;
  int i =1;
  int j =1;
  if(w > WIDTH || h > HEIGHT)
    return 1;
  //start = now_ms();
  for (i = 1; i < h - 1; ++i) {
    for (j = 1; j < w - 1; ++j) {
      int index = j + i * w;
      uint8_t lu = src[index - 1 - w];
      uint8_t lm = src[index - 1];
      uint8_t ld = src[index - 1 + w];
      uint8_t mu = src[index - w];
      uint8_t mm = src[index];
      uint8_t md = src[index + w];
      uint8_t ru = src[index + 1 - w];
      uint8_t rm = src[index + 1];
      uint8_t rd = src[index + 1 + w];
      int sum = lu + lm + ld + mu + mm + md + ru + rm + rd;
     // printf("%d, %d, %d, %d, %d, %d, %d %d, %d,
",lu, lm, ld, mu, mm, md, ru, rm, rd);
      dst[index] = (uint8_t)sum / 9 + 1;
     // printf(" dst[%d] =%d",index, dst[index]);
      if(ocl[index] != dst[index])
        printf("index[%d] differ 
", index);
    }
  //  printf("
");
  }
  end = now_ms();
  //printf("filter 0 %f 
", end - start);
  return 0;
}  


//°ÑÎıŸÎÄŒþ¶ÁÈëÒ»žöstringÖÐ
int convertToString(const char *filename, std::string& s)
{
    size_t size;
    char*  str;

    std::fstream f(filename, (std::fstream::in | std::fstream::binary));

    if(f.is_open())
    {
        size_t fileSize;
        f.seekg(0, std::fstream::end);
        size = fileSize = (size_t)f.tellg();
        f.seekg(0, std::fstream::beg);

        str = new char[size+1];
        if(!str)
        {
            f.close();
            return NULL;
        }

        f.read(str, fileSize);
        f.close();
        str[size] = '';

        s = str;
        delete[] str;
        return 0;
    }
    printf("Error: Failed to open file %s
", filename);
    return 1;
}

int main(int argc, char* argv[])
{
  int i, ret;
  double start, end;
  uint8_t * inputBuf;
  uint8_t * dstBuf1;
  uint8_t * dstBuf2;
  inputBuf =(uint8_t *)malloc(WIDTH * HEIGHT * sizeof(uint8_t));
  dstBuf1 =(uint8_t *)malloc(WIDTH * HEIGHT * sizeof(uint8_t));
  dstBuf2 =(uint8_t *)malloc(WIDTH * HEIGHT * sizeof(uint8_t));
  memset(dstBuf1,0,WIDTH * HEIGHT * sizeof(uint8_t));
  memset(dstBuf2,0,WIDTH * HEIGHT * sizeof(uint8_t));

  srand( (unsigned)time( NULL ) ); 
  for(i = 0; i < WIDTH * HEIGHT; i++) {
      inputBuf[i] = rand()%255;
    //printf("[%d] =%d
", i, inputBuf[i]);  
  }
  
  //return 0;
    cl_uint status;
    cl_platform_id platform;

    //ŽŽœšÆœÌš¶ÔÏó
    status = clGetPlatformIDs( 1, &platform, NULL );

    cl_device_id device;

    //ŽŽœšGPUÉ豞
    clGetDeviceIDs( platform, CL_DEVICE_TYPE_GPU,
        1,
        &device,
        NULL);
    cl_uint maxComputeUnits;
    status = clGetDeviceInfo(device,CL_DEVICE_MAX_COMPUTE_UNITS,
      sizeof(cl_uint),
      &maxComputeUnits,
      NULL);
    printf("maxComputeUnits = %d
" ,maxComputeUnits);


    //ŽŽœšcontext
    cl_context context = clCreateContext( NULL,
        1,
        &device,
        NULL, NULL, NULL);
    //ŽŽœšÃüÁî¶ÓÁÐ
    cl_command_queue queue = clCreateCommandQueue( context,
        device,
        CL_QUEUE_PROFILING_ENABLE, NULL );

    //ŽŽœšÈýžöOpenCLÄÚŽæ¶ÔÏó
    cl_mem clinbuf = clCreateBuffer(context,
        CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
        WIDTH*HEIGHT*sizeof(cl_uchar),inputBuf,
        NULL );
    
    cl_mem cloutbuf = clCreateBuffer( context,
        CL_MEM_WRITE_ONLY,
        WIDTH*HEIGHT * sizeof(cl_uchar),
        NULL, NULL );

    const char * filename  = "convolve.cl";
    std::string  sourceStr;
    status = convertToString(filename, sourceStr);
    const char * source    = sourceStr.c_str();
    size_t sourceSize[]    = { strlen(source) };

    //ŽŽœš³ÌÐò¶ÔÏó
    cl_program program = clCreateProgramWithSource(
        context, 
        1, 
        &source,
        sourceSize,
        NULL);
    //±àÒë³ÌÐò¶ÔÏó
    status = clBuildProgram( program, 1, &device, NULL, NULL, NULL );
    if(status != 0)
    {
        printf("clBuild failed:%d
", status);
        char tbuf[0x10000];
        clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, 0x10000, tbuf, NULL);
        printf("
%s
", tbuf);
        return -1;
    }

    cl_int dimx = WIDTH;
    cl_int dimy = HEIGHT;
    cl_event ev;
    cl_kernel kernel;
    cl_ulong startTime, endTime;
    cl_ulong kernelExecTimeNs;
    float *op_data = 0;
    
#if 1
    //ŽŽœšKernel¶ÔÏó
     kernel = clCreateKernel( program, "filter", NULL );

    //ÉèÖÃKernel²ÎÊý
    
    clSetKernelArg(kernel, 0, sizeof(cl_mem),  (void *)&clinbuf); 
       clSetKernelArg(kernel, 1, sizeof(cl_int),  (void *)&dimx);
    clSetKernelArg(kernel, 2, sizeof(cl_int),  (void *)&dimy);
    clSetKernelArg(kernel, 3, sizeof(cl_mem),  (void *)&cloutbuf);


    //Set local and global workgroup sizes
    size_t localws[2] = {1, 1} ; 
    size_t globalws[2] = {WIDTH,HEIGHT};

   
    //ÖŽÐÐkernel
    clEnqueueNDRangeKernel( 
        queue ,kernel, 
        2, 0, globalws, NULL, 
        0, NULL, &ev);

    clFinish( queue );
 //ŒÆËãkerenlÖŽÐÐʱŒä 
    
    clGetEventProfilingInfo(ev, CL_PROFILING_COMMAND_START,
        sizeof(cl_ulong), &startTime, NULL);
    clGetEventProfilingInfo(ev, CL_PROFILING_COMMAND_END,
        sizeof(cl_ulong), &endTime, NULL);
    kernelExecTimeNs = endTime-startTime;
    printf("kernal exec time :%8.6f ms
 ", kernelExecTimeNs*1e-6 );

    //ÊýŸÝ¿œ»ØhostÄÚŽæ
    cl_uchar *ptr;
    ptr = (cl_uchar *) clEnqueueMapBuffer( queue,
        cloutbuf,
        CL_TRUE,
        CL_MAP_READ,
        0,
        WIDTH*HEIGHT * sizeof(cl_uchar),
        0, NULL, NULL, NULL );
   //œá¹ûÑéÖ€£¬ºÍcpuŒÆËãµÄœá¹û±ÈœÏ

    start = now_ms();
    for(i = 0; i< FRAMES; i++) {
      ret = filter0(inputBuf, dstBuf1, ptr,WIDTH, HEIGHT);
      if(ret)
        printf("filter Fail 
");
    }
    end = now_ms();
    printf("filter 0 %f 
", (end - start)/FRAMES);

    //ÑéÖ€GPUŒÆËãœá¹û
/*    for(i = 0; i < M*N; i++)
    {
        //printf("%d, %6.3f,%6.3f
",i,outbuf[i],op_data[i]);
        if(abs(dstBuf1[i] - dstBuf2[i]) > 0.0001)
        {
            printf("check failed
");
            break;
        }
    }    
    if(i == M*N)
        printf("check passed
");   */
  #endif

    if(inputBuf)
        free(inputBuf);
    if(dstBuf1)
        free(dstBuf1);
    if(dstBuf2)
        free(dstBuf2);


    //ÉŸ³ýOpenCL×ÊÔŽ¶ÔÏó
    clReleaseMemObject(clinbuf); 
    clReleaseMemObject(cloutbuf);
    clReleaseProgram(program);
    clReleaseCommandQueue(queue);
    clReleaseContext(context);
    return 0;
}
View Code

convolve.cl 源码：

#pragma OPENCL EXTENSION cl_amd_printf : enable


__kernel void filter( __global uchar* in, int Width, int Height, __global uchar* out)
{
    // WIDTH
    int row = get_global_id(0);    
    //HEIGHT
    int col   = get_global_id(1);   
//    int wi = get_global_size(0);
//    int he = get_global_size(1);
   // printf("Magnum Global w= %d, h= %d,row=%d, col =%d
",wi,he,row,col);
    if(row == 0 || col == 0 ||row == Width -1 || col == Height -1)
      return;
    
    int index = row + col * Width;
    uchar lu = in[index - 1 - Width];
    uchar lm = in[index - 1];
    uchar ld = in[index - 1 + Width];
    uchar mu = in[index - Width];
    uchar mm = in[index];
    uchar md = in[index + Width];
    uchar ru = in[index + 1 - Width];
    uchar rm = in[index + 1];
    uchar rd = in[index + 1 + Width];
    int sum = lu + lm + ld + mu + mm + md + ru + rm + rd;
    out[index] = (uchar)sum / 9 + 1;
   // printf("%d, %d, %d, %d, %d, %d, %d %d, %d,
",lu, lm, ld, mu, mm, md, ru, rm, rd);
  //  printf("dst[%d] = %d
", index, out[index]);
}

下面是修改上面给出的模板makefile文件，来编译这个程序：
1. 因为是cpp,所以CC=g++, FILE_TYPE=cpp
2. 可执行文件的名字：EXE_NAME=convolve_cl

3. 链接的库：

LIBS= -lOpenCL -lfreeimage -lrt
IncludeDir = -I/opt/AMDAPP/include
LinkDir = -L/opt/AMDAPP/lib/x86_64
修改后的makefile如下： 

#Hellomake
#Magnum， 2014-10-19
# 指令编译器和选项
CC=g++
CFLAGS=-Wall
# 需要链接库的库名，比如libm.a，就是-lm,需要去掉前面的lib和后面的.a
LIBS= -lOpenCL -lfreeimage -lrt
# 设置默认搜索头文件的路径，优先是这个，然后是系统路径
IncludeDir = -I/opt/AMDAPP/include 
# 需要链接的库的路径
LinkDir = -L/opt/AMDAPP/lib/x86_64 
OBJ_DIR = ./obj
BIN_DIR = ./bin

#PROJECT_TOP_DIR  设置成pwd 或者"./"都行
PROJECT_TOP_DIR=.#$(shell pwd)#$(shell cd ../; pwd)
PROJECT_BIN_DIR=$(PROJECT_TOP_DIR)/bin
PROJECT_SRC_DIR=$(PROJECT_TOP_DIR)/
PROJECT_LIB_DIR=$(PROJECT_TOP_DIR)/lib
PROJECT_OBJ_DIR=$(PROJECT_TOP_DIR)/objs
MKDIR := mkdir -p

# 目标文件
EXE_NAME=convolve_cl
TARGET=$(BIN_DIR)/$(EXE_NAME)

#源文件的文件类型
FILE_TYPE=cpp
src=$(wildcard $(PROJECT_SRC_DIR)/*.$(FILE_TYPE))
dir= $(notdir $(src))
PROJECT_OBJ= $(patsubst %.$(FILE_TYPE),%.o,$(dir) )
PROJECT_ALL_OBJS= $(addprefix $(PROJECT_OBJ_DIR)/, $(PROJECT_OBJ))

all: chdir $(TARGET)
    @echo "magnum $(PROJECT_OBJ)"
    @echo "magnum $(PROJECT_OBJ_DIR)"
    @echo "magnum $(PROJECT_ALL_OBJS)"

$(TARGET): $(PROJECT_ALL_OBJS)
    $(CC) -o $@ $^ $(LinkDir) $(LIBS) 

chdir:
    @if test ! -d $(PROJECT_OBJ_DIR) ; 
        then 
        mkdir $(PROJECT_OBJ_DIR) ; 
    fi

    @if test ! -d $(PROJECT_BIN_DIR) ; 
        then 
        mkdir $(PROJECT_BIN_DIR) ; 
    fi

.PHONY : clean
clean:
    -rm -rf $(PROJECT_BIN_DIR) $(PROJECT_OBJ_DIR) 

$(PROJECT_OBJ_DIR)/%.o:$(PROJECT_SRC_DIR)/%.$(FILE_TYPE)
    $(CC) $(CFLAGS) -o $@ -c $< $(IncludeDir)

可以看到相比较之前的makefile只需要修改几个文件即可。
我的这个是ubuntu 环境 AMD显卡的opencl程序，虽然你们的环境有些不同，但是对于你们需要修改的编译程序也是同样适用的

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原文地址：https://www.cnblogs.com/biglucky/p/4037973.html