fuzz: if the caller of our makefile sets CC and CXX, trust them
This should fix the broken fuzzing build, because we've been
explicitly using clang++ but are now being given a CXX=afl++, which
does extra stuff.
Differential Revision: https://phab.mercurial-scm.org/D10066
--- a/contrib/fuzz/Makefile Fri Feb 26 12:16:43 2021 +0100
+++ b/contrib/fuzz/Makefile Wed Feb 24 12:40:54 2021 -0500
@@ -1,5 +1,5 @@
-CC = clang
-CXX = clang++
+CC ?= clang
+CXX ?= clang++
# By default, use our own standalone_fuzz_target_runner.
# This runner does no fuzzing, but simply executes the inputs