building and linking a shared library

Question

im trying to build a shared library on a windows cygwin platform using g++, and later link it with another cpp file: i use the following commands:

// generat         


        

Answer 1

When using -l to specify library to link, the linker will first search for lib.so before searching for lib.a.

In your case it doesn't work, because the library filename is not with .so suffix.

You may create simlink

libbeat.so -> libbeat.so.1.0.1

or

libbeat.so -> libbeat.so.1
libbeat.so.1 -> libbeat.so.1.0.1

You can also use -l:libbeat.so.1.0.1 (if your linker supports it, check in man ld description of -l parameter). Another option is to specify the library without -l

g++ -o checkbeat checkbeat.cpp -I . -L. libbeat.so.1.0.1

Note that the library you link to should be put after object/source file using its symbols - otherwise the linker may not find the symbols.