unify windows mkspecs: update definitions

mingw-w64 toolchain:
- add missing compiler definitions, similar to
  'msvc-desktop.conf' toolchain,
- describe the reasons of missing compiler definitions, available in
  'msvc-desktop.conf' toolchain,
- add missing 'QMAKE_CXXFLAGS' and 'QMAKE_CXXFLAGS_WARN_ON' variables,
  similar to 'msvc-desktop.conf' toolchain.

ICC on Windows toolchain:
- add 'QMAKE_CFLAGS_OPTIMIZE_FULL' variable, similar to 'gcc-base.conf'
  toolchain, though left it unused for now,
- add missing flags to 'QMAKE_CFLAGS' variable, similar to
  'msvc-desktop.conf' toolchain,
- update deprecated 'Qwd' flag with 'Qdiag-disable',
- use 'QMAKE_CFLAGS_OPTIMIZE_DEBUG' variable instead of '-Od' flag,
  similar to 'gcc-base.conf' toolchain (ICC implies '-O2' optimization
  level by default, while MSVC implies '-Od'),
- add 'QMAKE_CFLAGS_UTF8_SOURCE' variable, similar to
  'msvc-version.conf' toolchain; use a workaround to initialize it,
  until '-utf-8' flag would be supported by ICC on Windows,
- update deprecated '-Qstd=c++1z' flag with '-Qstd=c++17',

MSVC toolchain:
- remove 'incremental' from MSVC 'CONFIG' variable, since it has
  relevance only for the Unix generator,
- add 'QMAKE_CFLAGS_OPTIMIZE_DEBUG' variable, used in ICC for Windows
  toolchain,
- add empty 'QMAKE_LIBS' variable, similar to 'win32-g++' toolchain,
- add 'uuid.lib' library to 'QMAKE_LIBS_GUI' variable, similar to
  'win32-g++' toolchain,
- add C++14 and C++17 language support flags, though left them disabled
  for now, similar to 'win32-icc' toolchain.

Change-Id: Ideef62d0422674184836faa655bfc5d09a5f612f
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

0 files changed, 0 insertions, 0 deletions