Be verbose if --with-mp is enabled

throw error in configure.js when no 64-bit compiler detected

add config option to target codegen architectures

add /nologo to ARFLAGS

separate LDFLAGS and ARFLAGS to fix the unknown opts warns

extend warn list to exclude

add a configure option to suppress uncritical warns with clang

HAVE_STRNLEN should be in all toolsets

generalize arch setup

eliminate duplicated identical function definitions

generalize --with-php-build option handling

refactor zts related config

further fixes to win build

- fixed pdb generation with vs
- made object-out-dir to use an absolute path, that fixes path issues
with x86/x64 and nmake snap

moved libs and debug/release mode setup into functions

better description for the toolset config option

move more common ldflags into function

rename intel toolset to icc - shorter

either ms or intel linker is used, /libpath is supported

further catch up with phpize and improved clang arch setup

parametrize WINVER and update its value

further refactoring of toolset+phpize stuff

catch up the toolset changes with phpize

also packed common parts into functions so there's less code duplication

fix linking for clang, using linker directly

using the determined linker instead of compiler

this is a clang issue, longer parameter strings would be issue for both
compiler and linker

basic support for Intel Composer