linux脚本: makefile以及链接库

Linux makefile 教程非常详细，且易懂 http://blog.csdn.net/liang13664759/article/details/1771246

//sort.c

#include <stdio.h>

#include <string.h>

void swap(int* a, int* b);

int arry[] = {, , , ,};

void show(int * parry, int size)

{

  int i = ;

  printf("parry:");

  for(i=; i<size; i++)

  {

    printf("%d ", parry[i]);

  }

  printf("\n");

}

void sort(int* parry, int size)

{

  int i, j;

  int is_sort =  ;

  for(i = ; i < size -  && !is_sort; i++)

  {

    for(j = ; j < size -  - i; j++)

    {

      is_sort = ;

      if(parry[j] > parry[j+])

      {

        is_sort = ;

        swap(&parry[j], &parry[j+]);

      }

    }

  }

}

void old_sort(int* parry, int size)

{

  int i, j;

  for(i = ; i< size - ; i++)

  {

    for(j = ; j< size-  - i ; j++)

    {

         if(parry[j] > parry[j+])

        {

          swap(&parry[j], &parry[j+]);

        }

    }

  }

}

void swap(int* a, int* b)

{

  if(a== || b==)

  {

    return;

  }

  *a = *a ^ *b;

  *b = *a ^ *b;

  *a = *a ^ *b;

}

int func()

{

  show(arry,  );

  sort(arry,  );

  show(arry,  );

  return ;

}

//main.c

#include <stdio.h>

int main()

{

  printf("start main\n");

  func();

  return ;

}

#Makefile

a.out: main.o sort.o

    gcc -o a.out main.o sort.o

sort.o: sort.c

    gcc -o $@ -c $^

main.o : main.c

    gcc -o $@ -c $^

clean:

    rm -rf *.o a.out

#~/oucaijun/c/>make
make: Warning: File `Makefile' has modification time 43 s in the future
gcc -o main.o -c main.c
gcc -o sort.o -c sort.c
gcc -o a.out main.o sort.o
make: warning: Clock skew detected. Your build may be incomplete.
#~/oucaijun/c/>./a.out
start main
parry:1 4 5 23 17
parry:1 4 5 17 23

#~/oucaijun/c/>make clean
rm -rf *.o a.out

改Makefile:

#Makefile

a.out: main.o sort.o

 gcc -o a.out main.o sort.o

*.o: *.c

 gcc -o $@ -c $^

clean:

 rm -rf *.o a.out

make
make: Warning: File `Makefile' has modification time 85 s in the future
cc -c -o main.o main.c
cc -c -o sort.o sort.c
gcc -o a.out main.o sort.o
make: warning: Clock skew detected. Your build may be incomplete.

改Makefile:

#Makefile

a.out: main.o sort.o

 gcc -o a.out main.o sort.o

%.o: %.c

 gcc -o $@ -c $^

clean:

 rm -rf *.o a.out

make

make: Warning: File `Makefile' has modification time 71 s in the future
gcc -o main.o -c main.c
gcc -o sort.o -c sort.c
gcc -o a.out main.o sort.o
make: warning: Clock skew detected. Your build may be incomplete.

改Makefile

#Makefile

objs := main.o sort.o

a.out: $(objs)

 gcc -o a.out $^

%.o: %.c

 gcc -o $@ -c $^

clean:

 rm -rf *.o a.out

　　make结果仍同上.

objs := main.o sort.o

target := a.out

$(target): $(objs)

# gcc -o $@ $^  #ok

 gcc -o $(target) $(objs) #ok

%.o: %.c

 gcc -o $@ -c $^

clean:

 rm -rf *.o a.out

　　make结果仍同上.

Makefile以及链接库　　http://blog.csdn.net/zkf11387/article/details/8039249

Makefile 里 -l和-L的区别 http://blog.csdn.net/dreamxu/article/details/6259206

gcc -o test test.c -L. -lcrexr64

-L.表示在当前目录(.)中查找函数库，-lcrexr64表示使用名为libcrexr64.a的函数库

-L/usr/lib -L/opt/app/oracle/product/10.2.0.1/lib 表示在/usr/lib 以及 /opt/app/oracle/product/10.2.0.1/lib中查找函数库

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linux脚本: makefile以及链接库

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