Log Message:
Update to 0.5.0, provided by the new maintainer, Shaun Amott, in PR 34190.

New features in this release (compared to 0.5.0rc2):

   - Support for arithmetic on single-character constants.
   - Support for OUTPUT_FORMAT as an alias for YASM_OBJFMT.
   - A couple of other bugfixes.

New features in this release (compared to 0.5.0rc1):

   - Support for CodeView 8.0 source debugging (as used by Visual Studio
     2005).
   - Fixed -I support to properly handle relative paths (now the search
     pattern is essentially identical to most C compilers). This change is
     backwards incompatible (to both NASM and earlier Yasm versions), but
     is much more consistent.
   - Standard macros that provide version information: __YASM_MAJOR__,
     __YASM_MINOR__, __YASM_SUBMINOR__, __YASM_BUILD__, __YASM_VERSION_ID__
     and __YASM_VER__.

New features in this release (compared to 0.4.0) include:

   - Aliases for AMD64 object formats: "win64" and "elf64" (these
     automatically set the machine to "amd64").
   - "x64" alias for Win64 object format (for easier use with Visual
     Studio).
   - DWARF2 debugging format (enable with "-g dwarf2").
   - GAS parser good enough to take GCC output for both AMD64 and 32-bit
     x86 (including DWARF2 debug information).
   - Dozens of bugfixes in x86 and AMD64 support.
   - Specifying "amd64" as the machine (or using a 64-bit object format)
     automatically sets BITS 64.

Known issues with this release include:

   - List output is buggy and often outright wrong.
   - The optimizer is a very basic 2-pass style and generates inefficient
     (large) code at times.
   - The binary object format does not yet support sections other than
     .text, .bss, and .data, unlike newer versions of NASM (see Trac bug
     #71).