compiling with clang and plugin

Question

clang supports plugins, and often this concept is used to build tools like static analysis and such. To start playing with it I took this example which prints all function names present in the target cpp file(s).
I compiled the plugin running the following:

clang++ -v -std=c++11 PrintFunctionNames.cpp \
 $(llvm-config --cxxflags --ldflags) \
 -o plugin.so -shared -Wl,-undefined,dynamic_lookup

and then run it "by the book":

clang++ \
 -c main.cpp \
 -Xclang -load \
 -Xclang $PWD/plugin.so \
 -Xclang -plugin \
 -Xclang print-fns

it works just fine: it prints the function names in main.cpp
and exit (without compiling main.cpp due the -c flag).

What I'd like to do is to print all the function names AND compile main.cpp into an executable.
I tried removing the -c flag but I got:

/usr/bin/ld: cannot find /tmp/main-284664.o: No such file or directory

What am I doing wrong?

Answer 1

You need to use -add-plugin instead of -plugin