sdf.cpp compilation issue

[vcoda]

quint8 linecache[w];

UBFG\src\sdf.cpp:211: error: C2131: expression did not evaluate to a constant
..\src\sdf.cpp(211): error C2131: expression did not evaluate to a constant
..\src\sdf.cpp(211): note: failure was caused by a read of a variable outside its lifetime
..\src\sdf.cpp(211): note: see usage of 'w'