// It appears that on Mac OS X the 'environ' variable is not
// available to dynamically linked libraries.
// ...
#if defined(__APPLE__) && defined(__DYNAMIC__)
// The proper include for this is crt_externs.h, however it's not
// available on iOS. The right replacement is not known. See
// ...
extern "C" { extern char ***_NSGetEnviron(void); }
#define environ (*_NSGetEnviron()) 
#else
#if defined(__MWERKS__)
#include <crtl.h>
#else
#if !defined(_WIN32) || defined(__COMO_VERSION__)
extern char** environ;
#else
// SMAL patch for MinGW
// Seems as it should be #include <stdlib.h> but that does not work.
#if defined(_WIN32) && defined(__MINGW32__)
extern char** environ;
#endif
#endif
#endif
#endif