Fix the dependency for the pretty-rpass-full tests

The current code attempts to define the
PRETTY_DEPS$(1)_H_$(3)_pretty-rpass-full variable, which does not work,
because $(1) and $(3) are not inside a function. Moreover, there is a test
(run-pass-fulldeps/compiler-calls.rs) that uses rustc_driver, which is not
an indirect dependency of librustc or libsyntax. Listing all the
dependencies will be hard to maintain, but there's a better way to do
this...

As with the rpass-full and cfail-full tests, add dependencies using the
$$(CSREQ$(1)_T_$(3)_H_$(3)) variable, which includes the complete set of
host and target crates, built for a particular stage and host. We use
T_$(3), not T_$(2), because we only build LLVM for host triples (not
target triples), so we can only build rustc_llvm for host triples. The
fulldeps tests that use plugins need host rustc crates, whereas fulldeps
tests that link against rustc and run should be skipped for
cross-compilation (such as Android).

Fixes #22021

Author: rprichard

mk/tests.mk

@@ -753,20 +753,22 @@ PRETTY_DEPS_pretty-rpass-full = $(RPASS_FULL_TESTS)
 PRETTY_DEPS_pretty-rfail = $(RFAIL_TESTS)
 PRETTY_DEPS_pretty-bench = $(BENCH_TESTS)
 PRETTY_DEPS_pretty-pretty = $(PRETTY_TESTS)
-# The stage- and host-specific dependencies are for e.g. macro_crate_test which pulls in
-# external crates.
-PRETTY_DEPS$(1)_H_$(3)_pretty-rpass =
-PRETTY_DEPS$(1)_H_$(3)_pretty-rpass-full = $$(HLIB$(1)_H_$(3))/stamp.syntax $$(HLIB$(1)_H_$(3))/stamp.rustc
-PRETTY_DEPS$(1)_H_$(3)_pretty-rfail =
-PRETTY_DEPS$(1)_H_$(3)_pretty-bench =
-PRETTY_DEPS$(1)_H_$(3)_pretty-pretty =
 PRETTY_DIRNAME_pretty-rpass = run-pass
 PRETTY_DIRNAME_pretty-rpass-valgrind = run-pass-valgrind
 PRETTY_DIRNAME_pretty-rpass-full = run-pass-fulldeps
 PRETTY_DIRNAME_pretty-rfail = run-fail
 PRETTY_DIRNAME_pretty-bench = bench
 PRETTY_DIRNAME_pretty-pretty = pretty
 
+define DEF_PRETTY_FULLDEPS
+PRETTY_DEPS$(1)_T_$(2)_H_$(3)_pretty-rpass-full = $$(CSREQ$(1)_T_$(3)_H_$(3))
+endef
+
+$(foreach host,$(CFG_HOST), \
+ $(foreach target,$(CFG_TARGET), \
+  $(foreach stage,$(STAGES), \
+   $(eval $(call DEF_PRETTY_FULLDEPS,$(stage),$(target),$(host))))))
+
 define DEF_RUN_PRETTY_TEST
 
 PRETTY_ARGS$(1)-T-$(2)-H-$(3)-$(4) := \
@@ -780,7 +782,7 @@ check-stage$(1)-T-$(2)-H-$(3)-$(4)-exec: $$(call TEST_OK_FILE,$(1),$(2),$(3),$(4
 $$(call TEST_OK_FILE,$(1),$(2),$(3),$(4)): \
 	        $$(TEST_SREQ$(1)_T_$(2)_H_$(3)) \
 	        $$(PRETTY_DEPS_$(4)) \
-	        $$(PRETTY_DEPS$(1)_H_$(3)_$(4))
+	        $$(PRETTY_DEPS$(1)_T_$(2)_H_$(3)_$(4))
 	@$$(call E, run pretty-rpass [$(2)]: $$<)
 	$$(Q)touch $$@.start_time
 	$$(Q)$$(call CFG_RUN_CTEST_$(2),$(1),$$<,$(3)) \