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In addition, if you want to dynamically link libraries, you need to tell the linker where they are. -L/dir/containing -lc . If you don't want to set a LD_LIBRARY_PATH when executing, you'll need to set rpath , -Wl,--rpath=/path/containing . Points for pointing out what --rpath does.
GCC stands for GNU Compiler Collections which is used to compile mainly C and C++ language. It can also be used to compile Objective C and Objective C++.
To generate a shared library you need first to compile your C code with the -fPIC (position independent code) flag.
gcc -c -fPIC hello.c -o hello.o
This will generate an object file (.o), now you take it and create the .so file:
gcc hello.o -shared -o libhello.so
EDIT: Suggestions from the comments:
You can use
gcc -shared -o libhello.so -fPIC hello.c
to do it in one step. – Jonathan Leffler
I also suggest to add -Wall to get all warnings, and -g to get debugging information, to your gcc commands. – Basile Starynkevitch
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