Add test-JL-stdlibs target for precompiling stdlibs with JuliaLowering

This has a significant blacklist for now, but eventually we should be
able to build all of our stdlibs with JuliaLowering (and even include it
by default in the sysimage)

Author: topolarity

test/Makefile

@@ -77,6 +77,29 @@ revise-relocatedepot: revise-% :
 embedding:
 	@$(MAKE) -C $(SRCDIR)/$@ check $(EMBEDDING_ARGS)
 
+.PHONY: julia-sysimg-JL-release julia-sysimg-JL-debug
+julia-sysimg-JL-release julia-sysimg-JL-debug : julia-sysimg-JL-% : | $(build_private_libdir)
+	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) -f sysimage.mk sysimg-JL-$*
+
+### 34 / 51 (non-sysimage) stdlibs precompile successfully with JuliaLowering ###
+JULIALOWERING_FUNCTIONAL_STDLIBS := $(subst $(SPACE),\"$(COMMA)\",$(filter-out \
+	Statistics StyledStrings SparseArrays Profile JuliaSyntaxHighlighting DelimitedFiles Markdown Dates LibGit2 Downloads InteractiveUtils Test SharedArrays REPL TOML Pkg LazyArtifacts,\
+	$(shell tail -n +2 < $(JULIAHOME)/stdlib/Project.toml | cut -d= -f1)))
+
+.PHONY: JL-stdlibs
+JL-stdlibs: julia-sysimg-JL-$(JULIA_BUILD_MODE)
+	@TMPDEPOT=$$(mktemp -d); \
+        trap "rm -rf \"$$TMPDEPOT\"" EXIT; \
+	if ! JULIA_LOAD_PATH="@stdlib$(PATHSEP)$(shell echo $(call cygpath_w,$(JULIAHOME)/stdlib))" \
+	 JULIA_DEPOT_PATH="$$TMPDEPOT" \
+	 JULIA_FALLBACK_REPL=true \
+	 JULIA_USE_FLISP_LOWERING=0 \
+	 JULIA_CPU_TARGET="sysimage" \
+		$(call spawn, $(JULIA_EXECUTABLE)) --sysimage $(build_private_libdir)/sys-JL.$(SHLIB_EXT) --startup-file=no -e "Base.Precompilation.precompilepkgs(String[\"$(JULIALOWERING_FUNCTIONAL_STDLIBS)\"]; configs=[\`\`=>Base.CacheFlags(debug_level=2, opt_level=3), \`\`=>Base.CacheFlags(check_bounds=1, debug_level=2, opt_level=3)])"; then \
+		echo '*** This error is usually fixed by running `make clean`. If the error persists$(COMMA) try `make cleanall`. ***'; \
+		false; \
+	fi
+
 .PHONY: gcext
 gcext:
 	@$(MAKE) -C $(SRCDIR)/$@ check $(GCEXT_ARGS)