Use alloca(3) instead of malloc(3) for memory management

Packages describing “alloca” as local USE flag

Package “alloca” Flag Description
sci-libs/kissfft Use alloca(3) instead of malloc(3) for memory management
dev-libs/tre Enable if you want TRE to use alloca() instead of malloc() when allocating memory needed for regexec operations

All packages providing a “alloca” USE flag (1)