The following options can be passed to make when building Zircon:
BOOTFS_DEBUG_MODULES: See debugging tips.
DEBUG: This specifies the debug level. The default is 2. Setting DEBUG=1 will disable some debugging code (such as DEBUG_ASSERT()), while setting DEBUG=0 will disable more debugging code.
ENABLE_ACPI_DEBUG: See ACPI debugging.
ENABLE_DDK_DEPRECATIONS: Turn on deprecation warnings for DDK APIs.
GLOBAL_DEBUGFLAGS: See debugging tips.
GOMACC: Path to the Goma compiler wrapper, gomacc, for use within Google for distributed builds. The default is not to use Goma.
USE_ASAN: Set USE_ASAN=1 to enable using ASan (the address sanitizer).
USE_CLANG: Set USE_CLANG=1 to enable building with Clang. Otherwise, the default is to use GCC as the compiler.
V: Set V=1 to tell the build system to print each command that make executes. Otherwise, the build system only prints a short summary of each build step.