This is an example how to create multibase libraries for Amiga. The example is
written for MorphOS but should compile without modifications for other Amigas.
It also provides an optional semaphore protection if you wish to use disk I/O.

Some general remarks:

 * LIB_Init()

   Do not open any 3rd party libraries here. While it is possible there is
   risk that you run into stack underflow situations on some systems and
   crash.

 * LIB_Open()/LIB_Close()

   This is executed in Forbid() state but if your code breaks Forbid() you
   can use semaphore protection. On this example code you can enable
   semaphore protection with HAVE_USER_INIT define.

 * LIB_Expunge()

   It is illegal to break Forbid() here. You must only perform operations
   which dont involve disk I/O or wont call directly or indirectly
   Wait()/WaitPort(). Closing any 3rd party library at LIB_Expunge() is unsafe.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 4571    4716  96.9% -lh5- e70a Dec  4 00:33 multibaselibrary.info
[generic]                 1873    7603  24.6% -lh5- 85a5 Dec  4 00:11 multibaselibrary/Library.c
[generic]                  581    1405  41.4% -lh5- ede1 Dec  2 21:38 multibaselibrary/Library.h
[generic]                  316     510  62.0% -lh5- 7108 Dec  2 21:50 multibaselibrary/makefile.morphos
[generic]                  589    1125  52.4% -lh5- 32bb Dec  4 00:32 multibaselibrary/multibaselib.readme
[generic]                  196     291  67.4% -lh5- 2a81 Dec  3 23:54 multibaselibrary/test.c
[generic]                   69     109  63.3% -lh5- e466 Dec  2 21:48 multibaselibrary/Version.h
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         7 files    8195   15759  52.0%            Dec  3 17:30