Our zlib dependency fails to compile on clang-15 because -Wdeprecated-non-prototype is enabled by default.

Upstream appears to be aware but as of today it hasn't been fixed yet: https://github.com/madler/zlib/issues/633

One possible work-around would be to disable this warning for zlib, eg:

diff --git a/src/third_party/scripts/zlib_get_sources.sh b/src/third_party/scripts/zlib_get_sources.sh
index e48154de802..aae536ad400 100755
--- a/src/third_party/scripts/zlib_get_sources.sh
+++ b/src/third_party/scripts/zlib_get_sources.sh
@@ -51,6 +51,8 @@ env.Append(CPPDEFINES=["HAVE_STDARG_H"])
 if not env.TargetOSIs('windows'):
     env.Append(CPPDEFINES=["HAVE_UNISTD_H"])

+env.Append(CCFLAGS=["-Wno-deprecated-non-prototype"])
+
 env.Library(
     target="zlib",
     source=[