configure fails for VS2013 if environment variable 'CL' was set
|Reported by:||Michael||Owned by:|
|Blocking:||Reproduced by developer:||no|
|Analyzed by developer:||no|
Summary of the bug:
Certain values for the environment variable 'CL' on Windows break MSVC-based builds.
How to reproduce:
Set CL to '/MP' (or similar arguments containing forward slashes)
On several occasions (configure and actual build) msys path conversion kicks in and mangles the environment variable into something like 'c:\mingw\msys\1.0\MP', leading to missing bogus files for compiler and linker.
set 'CL' to '-MP' or similar. The error is not ffmpegs fault but hard to identify, and should at least be mentioned at documentation level: