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C++ shared library define and undefine functionality

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http://stackoverflow.com – I have a question regarding specific inclusion of functionality using shared libraries. I have my own small in-code profiler, that I am using in multiple projects so usually include as a shared library. Originally I wanted to turn of the profiling code using compile time flag. For example: #ifdef PROFILEAPP class Profiler { static void start() { ... } static void stop() { ... } }; #else class Profiler { static void start(){} static void stop(){} }; However, I this does not work if the lib is compiled before hand without defining the symbols. Note that my library is not header (HowTos)

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Submitted by fooubuntu on 01/21/2013

Stories similar to C++ shared library define and undefine functionality

I've two files:

lib.c

#include<stdio.h>

void hi() { printf("Hi i'm a library function in lib.so\n"); }

and main.c

#include<stdio.h> #include<dlfcn.h> /* based on Jeff Scudder's code */ int main() { void *SharedObjectFile; void (*hi)();

// Load the shared libary; SharedObjectFile = dlopen("./lib.so", RTLD_LAZY);

// Obtain the address of a function in the share

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Hi, I have tried for weeks. I am creating a shared library from two object files a.o and b.o.

Both a and b are classes that depend on a third-party library and class b wraps class a.

and therefore, both a.o and b.o have the same globals defined from the third-party api. So I create a.o with

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