v0.9.45

Program calls now find the called program when they run, as on IBM i
(#23), and the runtime compiles without GCC warnings (#19). These changes
have not yet been checked on a real IBM i, because PUB400 is down.

Behaviour changes to be aware of

• Every program call (CALLP of an EXTPGM prototype, or CALL) is resolved
  at run time from a shared library. Callers no longer link a called
  program's object file. Build each called program with the new
  rpgc -shared ORD100.rpgle, which produces ORD100.so, ORD100.dylib or
  ORD100.dll, named after the source file, and put it next to the caller
  or on PATH. A called program written as a NOMAIN module needs to become
  a program: give it an *ENTRY PLIST, or DCL-PI *N in free form.

New

• Dynamic program calls (#23):
  • rpgc -shared builds a program that others call.
  • EXTPGM(variable) and CALL with a field in Factor 2 choose the program
    at run time. EXTPGM with no name means the prototype's own name.
  • The program is looked for in the caller's directory, then on PATH,
    then wherever the system loader looks. It is loaded on its first call.
  • A program that can't be found is status 211. One that ends in error is
    status 202 in its caller. CALLP(E) now reports an error's own status.
  • Parameters are passed in IBM i's formats (CHAR as bytes, INT as a
    native integer, PACKED as packed decimal, ZONED as digits), so a
    called program can be written in C, or be a GnuCOBOL module.
• Free-form programs can receive parameters, with DCL-PI *N among the
  main statements.

Fixes

• GCC no longer warns about the runtime on any compile (#19). Numbers are
  now formatted into strings sized to fit, which also fixes %CHAR of very
  wide decimal fields being cut short. The display-file runtime gets the
  same fix.
• Windows: an SQL program with a field named MSG compiles (also in v0.9.44).

Known issues

Found while testing this release, and not yet fixed: #26 (INT(20) is 32-bit),
#27 (INZ(*ON) on an indicator is ignored), #28 (adding a duration to a
timestamp leaves it unchanged), and #29 (an indicator can't be concatenated
to a character value).

349 OpenRPG tests, 39 dspfc tests and 28 interactive display-file tests pass.