[Boost-build] Building library with vc++ 64-bit does not find vcvarsall.bat

Subject: [Boost-build] Building library with vc++ 64-bit does not find vcvarsall.bat
From: Edward Diener (eldiener_at_[hidden])
Date: 2017-10-13 20:26:47

If I build any library with any version vc++ 64-bit compiler, by using 
address-model=64, the vcvarsall.bat is looked for at, for example with 
msvc-14.0, C:/Program Files (x86)/Microsoft Visual Studio 
14.0/VC/bin/vcvarsall.bat and is not found. Naturally this leads to 
basic compilation failures. The path for vcvarsall.bat for msvc-14.0 is 
C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/vcvarsall.bat 
instead. All versions of vc++ follow this path structure for vcvarsall.bat

Building with any version of vc++ 32-bit, by not specifying the 
address-model, works correctly.