test

    // later 'CFLAGS ?= -O3' in the makefile, which must still be free to set

    // the value -- exactly the pattern zstd's libzstd.mk relies on.

    set_default("ARFLAGS", "rv");

    // GNU make's built-in "compile"/"link" recipe variables. Real makefiles

    // (zstd's lib/Makefile among them: "$(COMPILE.c) $(DEPFLAGS)

    // $(OUTPUT_OPTION) $<", "$(COMPILE.S) $(OUTPUT_OPTION) $<") reference

    // these directly rather than spelling out $(CC)/$(CFLAGS)/... themselves.

    // Without a definition here they silently expand to "", which is worse

    // than just a missing flag: the leading '-' of the next token on the

    // recipe line (e.g. DEPFLAGS = "-MMD -MP") then becomes the FIRST

    // character of the expanded command and is misparsed as the recipe's

    // "ignore errors" prefix -- matching real GNU make's own (surprising, but

    // verified against it) behavior of checking that prefix only after full

    // macro expansion.

    set_default_recursive("COMPILE.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c");

    set_default_recursive("COMPILE.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c");

    set_default_recursive("COMPILE.cpp", "$(COMPILE.cc)");

    set_default_recursive("COMPILE.C", "$(COMPILE.cc)");

    set_default_recursive("COMPILE.S", "$(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_MACH) -c");

    set_default_recursive("COMPILE.s", "$(AS) $(ASFLAGS) $(TARGET_MACH)");

    set_default_recursive("LINK.o", "$(CC) $(LDFLAGS) $(TARGET_ARCH)");

    set_default_recursive("LINK.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)");

    set_default_recursive("LINK.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)");

    set_default_recursive("LINK.cpp", "$(LINK.cc)");

    set_default_recursive("LINK.C", "$(LINK.cc)");

    set_default_recursive("OUTPUT_OPTION", "-o $@");

    force_set("MAKE", argv0);

    force_set("SHELL", "/bin/sh");

    force_set(".SHELLFLAGS", "-c");