.a .so .a-->.so编译

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测试代码

hello.c hello.h

makefile:

CFLAGS = -g -O2  -Wall -Werror -Wno-unused -fPIC
CXXFLAGS = -fPIC -shared


hello.o:hello.c hello.h
gcc -c $(CFLAGS) $(CXXFLAGS) hello.c

libhello.so:hello.o

ar cr libhello.a hello.o


staticlib:hello.o

ar cr libhello.a hello.o

dynamic:hello.o
gcc hello.o $(CXXFLAGS) -o libhello.so

all:libhello.so
echo "compile start..."
gcc -fPIC -shared -o libhello.so hello.h -Wl,--whole-archive libhello.a -Wl,--no-whole-archive


clean:
rm *.o *.a


静态库:

ar cr libhello.a hello.o

动态库:

gcc hello.o $(CXXFLAGS) -o libhello.so

静态->动态

gcc -fPIC -shared -o libhello.so hello.h -Wl,--whole-archive libhello.a -Wl,--no-whole-archive

注意:

在将静态库转为动态库的过程中,一定要保证在编译静态库的时候加上了 -fpic编译选项,不然会出现

‘/usr/bin/ld: libhello.a(hello.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
libhello.a(hello.o): error adding symbols: Bad value collect2: error: ld returned 1 exit status‘ 错误信息。

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转载自blog.csdn.net/dzw19911024/article/details/79300589
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