FFI: Make FFI call return nil when C function returns NULL
Before when a C function returned NULL pointer, an ExternalAddress with
address 0 wes returned which required an extra check in a caller to
convert it to nil, which would be the customary. This commit automatically
converts NULL pointers to Smalltalk `nil` as a courtesy to a Smalltalker.
This directory contains the basic classes.
They are compiled by stc into the library 'libbasic' to be
linked to your application. It is also needed to build a complete
smalltalk (the one you're currently in).
Depending on the configuration and capabilities of your Operating-
System, the resulting classlibrary is either:
libbasic.a - an archive
libbasic.obj - a prelinked object library
libbasic.so - a shared object
the library includes init code (libbasic_Init) for all of its components.
Things you can do here:
make compile all classes, producing libbasic
make objs compile all object files
make install compile all and install in DESTLIBDIR
make qinstall only install - assumes binaries are up-to-date
make check syntax check only over all .st files
make <file>.o compile <file>.st to object-file
make <file>.c compile <file>.st to c intermediate
make <file>.chk run syntax check on <file>.st
make clean clean individual .o-files; leave library
make clobber clean everything