1. Prerequisites
----------------
-A C compiler. Any C89 or better compiler should work. Where supported,
-configure will attempt to enable the compiler's run-time integrity checking
-options. Some notes about specific compilers:
+A C compiler. Any C89 or better compiler that supports variadic macros
+should work. Where supported, configure will attempt to enable the
+compiler's run-time integrity checking options. Some notes about
+specific compilers:
- clang: -ftrapv and -sanitize=integer require the compiler-rt runtime
(CC=clang LDFLAGS=--rtlib=compiler-rt ./configure)