Do not create object file on syntax checking.
Do not create object file on syntax checking.

Users of codebender have the ability to verify their code. Adding the
-fsyntax-only flag to gcc might provide a small speed boost. Syntax
checking is done on *.ino files only, which are converted to *.cpp
files. Thus, only CPPFLAGS is altered.

This addition is ugly because it changes the value of an apparently
constant variable.

codebendercc/compiler,codebendercc/compiler,codebendercc/compiler,codebendercc/compiler