DYLD_LIBRARY_PATH & DYLD_INSERT_LIBRARIES not working

Question

I create a .dylib file and compile it:

#define _GNU_SOURCE
#include 
#include 

static void* (*real_malloc)(size_t);

void *mal         


        

Answer 1

From dyld docs:

DYLD_INSERT_LIBRARIES This is a colon separated list of dynamic libraries to load before the ones specified in the program. This lets you test new modules of existing dynamic shared libraries that are used in flat-namespace images by loading a temporary dynamic shared library with just the new modules. Note that this has no effect on images built a two-level namespace images using a dynamic shared library unless DYLD_FORCE_FLAT_NAMESPACE is also used.

DYLD_FORCE_FLAT_NAMESPACE Force all images in the program to be linked as flat-namespace images and ignore any two-level namespace bindings. This may cause programs to fail to execute with a multiply defined symbol error if two-level namespace images are used to allow the images to have multiply defined symbols.

So your code needed DYLD_FORCE_FLAT_NAMESPACE=1. Anyway, my implementation works for /usr/local/bin/git only with this option enabled.