Log message:
Added two patches. patch-ab avoids tons of #line warnings from the cpp
output, patch-ac fixes the special handling of functions called
malloc().

Bumped PKGREVISION.

Log message:
- Perl is needed at runtime.
- Made the package work with CHECK_INTERPRETER=yes set.
- Bumped PKGREVISION.

Log message:
Added documentation and example files. Bumped PKGREVISION.

Log message:
Imported cqual.

cqual is a type-based analysis tool for finding bugs in C programs. It
extends the type system of C with extra user-defined type qualifiers.
The programmer annotates their program in a few places, and cqual
performs qualifier inference to check whether the annotations are
correct.