[Rust,front-end,v3,40/46] gccrs: Add GCC Rust front-end Make-lang.in

diff --git a/gcc/rust/Make-lang.in b/gcc/rust/Make-lang.in
new file mode 100644
index 00000000000..a62e793a29d
--- /dev/null
+++ b/gcc/rust/Make-lang.in
@@ -0,0 +1,399 @@ 
+# Make-lang.in -- Top level -*- makefile -*- fragment for GCC Rust frontend.
+
+# Copyright (C) 2009-2022 Free Software Foundation, Inc.
+
+# This file is part of GCC.
+
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+# This file provides the language dependent support in the main Makefile.
+
+#RUST_EXES = rust
+
+# Use strict warnings for this front end.
+rust-warn = $(STRICT_WARN)
+
+# Installation name. Useful for cross compilers and used during install.
+GCCRS_INSTALL_NAME := $(shell echo gccrs|sed '$(program_transform_name)')
+GCCRS_TARGET_INSTALL_NAME := $(target_noncanonical)-$(shell echo gccrs|sed '$(program_transform_name)')
+
+# Define the names for selecting rust in LANGUAGES.
+rust: rust1$(exeext)
+
+# Tell GNU make to ignore files by these names if they exist.
+.PHONY: rust
+
+# removed GRS_CFLAGS from here
+
+CFLAGS-rust/rustspec.o += $(DRIVER_DEFINES)
+
+# Create the compiler driver gccrs.
+# A compiler driver is the program that interprets command argument and can be called from the command
+# line - e.g. gcc or g++, and not cc1, which is the actual compiler
+
+# Create driver objects
+GCCRS_D_OBJS = \
+   $(GCC_OBJS) \
+   rust/rustspec.o \
+   $(END)
+
+gccrs$(exeext): $(GCCRS_D_OBJS) $(EXTRA_GCC_OBJS) libcommon-target.a $(LIBDEPS)
+	+$(LINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ \
+	  $(GCCRS_D_OBJS) $(EXTRA_GCC_OBJS) libcommon-target.a \
+	  $(EXTRA_GCC_LIBS) $(LIBS)
+
+# List of host object files used by the rust language - files for translation from the parse tree
+# to GENERIC
+# The compiler proper, not driver
+GRS_OBJS = \
+    rust/rust-lang.o \
+    rust/rust-object-export.o \
+    rust/rust-linemap.o \
+    rust/rust-gcc-diagnostics.o \
+    rust/rust-diagnostics.o \
+    rust/rust-gcc.o \
+    rust/rust-token.o \
+    rust/rust-lex.o \
+    rust/rust-cfg-parser.o \
+    rust/rust-parse.o \
+    rust/rust-ast-full-test.o \
+    rust/rust-ast-dump.o \
+    rust/rust-hir-dump.o \
+    rust/rust-session-manager.o \
+    rust/rust-compile.o \
+    rust/rust-mangle.o \
+    rust/rust-compile-resolve-path.o \
+    rust/rust-macro-expand.o \
+    rust/rust-attribute-visitor.o \
+    rust/rust-macro-invoc-lexer.o \
+    rust/rust-macro-substitute-ctx.o \
+    rust/rust-macro-builtins.o \
+    rust/rust-hir-full-test.o \
+    rust/rust-hir-map.o \
+    rust/rust-attributes.o \
+    rust/rust-abi.o \
+    rust/rust-ast-lower.o \
+    rust/rust-ast-lower-base.o \
+    rust/rust-ast-lower-pattern.o \
+    rust/rust-ast-lower-item.o \
+    rust/rust-name-resolver.o \
+    rust/rust-ast-resolve.o \
+    rust/rust-ast-resolve-base.o \
+    rust/rust-ast-resolve-item.o \
+    rust/rust-ast-resolve-pattern.o \
+    rust/rust-ast-resolve-expr.o \
+    rust/rust-ast-resolve-type.o \
+    rust/rust-ast-resolve-path.o \
+    rust/rust-ast-resolve-stmt.o \
+    rust/rust-ast-resolve-struct-expr-field.o \
+    rust/rust-hir-type-check.o \
+    rust/rust-privacy-check.o \
+    rust/rust-privacy-ctx.o \
+    rust/rust-reachability.o \
+    rust/rust-visibility-resolver.o \
+    rust/rust-pub-restricted-visitor.o \
+    rust/rust-privacy-reporter.o \
+    rust/rust-tyty.o \
+    rust/rust-tyty-call.o \
+    rust/rust-tyctx.o \
+    rust/rust-tyty-bounds.o \
+    rust/rust-hir-type-check-util.o \
+    rust/rust-hir-trait-resolve.o \
+    rust/rust-hir-type-check-toplevel.o \
+    rust/rust-hir-type-check-item.o \
+    rust/rust-hir-type-check-type.o \
+    rust/rust-hir-type-check-struct.o \
+    rust/rust-hir-type-check-pattern.o \
+    rust/rust-hir-type-check-expr.o \
+    rust/rust-hir-type-check-stmt.o \
+    rust/rust-hir-type-check-enumitem.o \
+    rust/rust-hir-type-check-implitem.o \
+    rust/rust-hir-dot-operator.o \
+    rust/rust-coercion.o \
+    rust/rust-casts.o \
+    rust/rust-hir-type-check-base.o \
+    rust/rust-autoderef.o \
+    rust/rust-substitution-mapper.o \
+    rust/rust-const-checker.o \
+    rust/rust-lint-marklive.o \
+    rust/rust-lint-unused-var.o \
+    rust/rust-hir-type-check-path.o \
+    rust/rust-unsafe-checker.o \
+    rust/rust-compile-intrinsic.o \
+    rust/rust-compile-pattern.o \
+    rust/rust-compile-fnparam.o \
+    rust/rust-base62.o \
+    rust/rust-optional-test.o \
+    rust/rust-compile-item.o \
+    rust/rust-compile-implitem.o \
+    rust/rust-compile-stmt.o \
+    rust/rust-compile-expr.o \
+    rust/rust-compile-type.o \
+    rust/rust-compile-block.o \
+    rust/rust-compile-struct-field-expr.o \
+    rust/rust-constexpr.o \
+    rust/rust-compile-base.o \
+    rust/rust-tree.o \
+    rust/rust-compile-context.o \
+    rust/rust-export-metadata.o \
+    rust/rust-imports.o \
+    rust/rust-import-archive.o \
+    rust/rust-extern-crate.o \
+    $(END)
+# removed object files from here
+
+# All language-specific object files for Rust.
+RUST_ALL_OBJS = $(GRS_OBJS) $(RUST_TARGET_OBJS)
+
+rust_OBJS = $(RUST_ALL_OBJS) rust/rustspec.o
+
+# The compiler itself is called rust1 (formerly grs1)
+rust1$(exeext): $(RUST_ALL_OBJS) attribs.o $(BACKEND) $(LIBDEPS)
+	+$(LLINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ \
+	      $(RUST_ALL_OBJS) attribs.o $(BACKEND) $(LIBS) $(BACKENDLIBS)
+
+# Build hooks.
+
+lang_checks += check-rust
+lang_checks_parallelized += check-rust
+check_rust_parallelize = 10
+
+# Copies its dependencies into the source directory. This generally should be used for generated files
+# such as Bison output files which are not version-controlled, but should be included in any release
+# tarballs. This target will be executed during a bootstrap if ‘--enable-generated-files-in-srcdir’
+# was specified as a configure option.
+rust.srcextra:
+
+rust.all.cross: gccrs$(exeext)
+
+# idk what this does but someone used it
+rust.start.encap: gccrs$(exeext)
+rust.rest.encap:
+
+# Build generated man pages for the front end from Texinfo manuals (see Man Page Generation), in the
+# build directory. This target is only called if the necessary tools are available, but should ignore
+# errors so as not to stop the build if errors occur; man pages are optional and the tools involved
+# may be installed in a broken way.
+rust.man:
+
+# Copies its dependencies into the source directory. These targets will be executed during a bootstrap
+# if ‘--enable-generated-files-in-srcdir’ was specified as a configure option.
+rust.srcman:
+
+# Clean hooks.
+
+rust.mostlyclean:
+#	cd $(srcdir)/rust; rm -f *.o y.tab.h y.tab.c lex.yy.c
+
+rust.clean: rust.mostlyclean
+
+# Builds an etags TAGS file in the language subdirectory in the source tree.
+# TODO: add more directories if I add more
+rust.tags: force
+	cd $(srcdir)/rust; \
+	etags -o TAGS.sub *.y *.l *.cc *.h ast/*.h ast/*.cc lex/*.h lex/*.cc parse/*.h parse/*.cc; \
+	etags --include TAGS.sub --include ../TAGS.sub
+
+# Build documentation hooks.
+
+# Build info documentation for the front end, in the build directory. This target is only called by
+# ‘make bootstrap’ if a suitable version of makeinfo is available, so does not need to check for this,
+# and should fail if an error occurs.
+rust.info:
+
+rust.srcinfo:
+
+# Build DVI documentation for the front end, in the build directory. This should be done using
+# $(TEXI2DVI), with appropriate -I arguments pointing to directories of included files.
+rust.dvi:
+
+# Build PDF documentation for the front end, in the build directory. This should be done using
+# $(TEXI2PDF), with appropriate -I arguments pointing to directories of included files.
+rust.pdf:
+
+doc/rust.info:
+doc/rust.dvi:
+doc/rust.pdf:
+
+# Build HTML documentation for the front end, in the build directory.
+rust.html:
+
+# Install hooks.
+
+# Install everything that is part of the front end, apart from the compiler executables listed in
+# compilers in config-lang.in.
+rust.install-common: installdirs
+#	-rm -f $(DESTDIR)$(bindir)/$(GCCRS_INSTALL_NAME)$(exeext)
+#	-rm -f $(DESTDIR)$(bindir)/$(GCCRS_TARGET_INSTALL_NAME)$(exeext)
+#	$(INSTALL_PROGRAM) gccrs$(exeext) $(DESTDIR)$(bindir)/$(GCCRS_INSTALL_NAME)$(exeext)
+#	if test -f $(DESTDIR)$(bindir)$(GCCRS_TARGET_INSTALL_NAME)$(exeext); then \
+#	  :; \
+#	else \
+#	  cd $(DESTDIR)$(bindir) && \
+#	   $(LN) $(GCCRS_INSTALL_NAME)$(exeext) $(GCCRS_TARGET_INSTALL_NAME)$(exeext); \
+#	fi
+	-rm -f $(DESTDIR)$(bindir)/$(GCCRS_INSTALL_NAME)$(exeext)
+	$(INSTALL_PROGRAM) gccrs$(exeext) $(DESTDIR)$(bindir)/$(GCCRS_INSTALL_NAME)$(exeext)
+	rm -f $(DESTDIR)$(bindir)/$(GCCRS_TARGET_INSTALL_NAME)$(exeext); \
+	( cd $(DESTDIR)$(bindir) && \
+      $(LN) $(GCCRS_INSTALL_NAME)$(exeext) $(GCCRS_TARGET_INSTALL_NAME)$(exeext) ); \
+
+# Install headers needed for plugins.
+rust.install-plugin:
+
+# Uninstall files installed by installing the compiler. This is currently documented not to be
+# supported, so the hook need not do anything.
+rust.uninstall:
+#	-rm -rf $(DESTDIR)/$(bindir)/$(GCCRS_INSTALL_NAME)$(exeext)
+	-rm -f gccrs$(exeext) grs1$(exeext)
+	-rm -f $(RUST_ALL_OBJS)
+# ^those two are a maybe
+
+# Enable selftests for the rust frontend
+selftest-rust: s-selftest-rust
+
+RUST_SELFTEST_FLAGS = -xrs $(SELFTEST_FLAGS)
+RUST_SELFTEST_DEPS = rust1$(exeext) $(SELFTEST_DEPS)
+
+# Run the rust selftests
+s-selftest-rust: $(RUST_SELFTEST_DEPS)
+	$(GCC_FOR_TARGET) $(RUST_SELFTEST_FLAGS)
+	$(STAMP) $@
+
+# Install info documentation for the front end, if it is present in the source directory. This target
+# should have dependencies on info files that should be installed.
+rust.install-info:
+
+rust.install-pdf:
+
+# Install man pages for the front end. This target should ignore errors.
+rust.install-man:
+
+# Stage hooks:
+# The toplevel makefile has already created stage?/rust at this point.
+# Used for handling bootstrap
+
+rust.stage1: stage1-start
+	-mv rust/*$(objext) stage1/rust
+rust.stage2: stage2-start
+	-mv rust/*$(objext) stage2/rust
+rust.stage3: stage3-start
+	-mv rust/*$(objext) stage3/rust
+rust.stage4: stage4-start
+	-mv rust/*$(objext) stage4/rust
+rust.stageprofile: stageprofile-start
+	-mv rust/*$(objext) stageprofile/rust
+rust.stagefeedback: stagefeedback-start
+	-mv rust/*$(objext) stagefeedback/rust
+
+CFLAGS-rust/rust-lang.o += -DDEFAULT_TARGET_VERSION=\"$(version)\" \
+	-DDEFAULT_TARGET_MACHINE=\"$(target_noncanonical)\"
+
+# cross-folder includes - add new folders later
+RUST_INCLUDES = -I $(srcdir)/rust \
+	-I $(srcdir)/rust/lex \
+	-I $(srcdir)/rust/parse \
+	-I $(srcdir)/rust/ast \
+	-I $(srcdir)/rust/analysis \
+	-I $(srcdir)/rust/backend \
+	-I $(srcdir)/rust/expand \
+	-I $(srcdir)/rust/hir/tree \
+	-I $(srcdir)/rust/hir \
+	-I $(srcdir)/rust/resolve \
+	-I $(srcdir)/rust/util \
+	-I $(srcdir)/rust/typecheck \
+	-I $(srcdir)/rust/checks/lints \
+	-I $(srcdir)/rust/checks/errors \
+	-I $(srcdir)/rust/checks/errors/privacy \
+	-I $(srcdir)/rust/util \
+        -I $(srcdir)/rust/metadata
+
+# add files that require cross-folder includes - currently rust-lang.o, rust-lex.o
+CFLAGS-rust/rust-lang.o += $(RUST_INCLUDES)
+CFLAGS-rust/rust-lex.o += $(RUST_INCLUDES)
+CFLAGS-rust/rust-parse.o += $(RUST_INCLUDES)
+CFLAGS-rust/rust-session-manager.o += $(RUST_INCLUDES)
+
+RUST_CXXFLAGS = $(CXXFLAGS)
+
+# build all rust/lex files in rust folder, add cross-folder includes
+rust/%.o: rust/lex/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build all rust/parse files in rust folder, add cross-folder includes
+rust/%.o: rust/parse/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/ast files in rust folder
+rust/%.o: rust/ast/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/backend files in rust folder
+rust/%.o: rust/backend/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/expand files in rust folder
+rust/%.o: rust/expand/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/util files in rust folder
+rust/%.o: rust/util/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/hir files in rust folder
+rust/%.o: rust/hir/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/hir/tree files in rust folder
+rust/%.o: rust/hir/tree/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/resolve files in rust folder
+rust/%.o: rust/resolve/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/typecheck files in rust folder
+rust/%.o: rust/typecheck/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/checks/lints files in rust folder
+rust/%.o: rust/checks/lints/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/checks/errors files in rust folder
+rust/%.o: rust/checks/errors/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build privacy pass files in rust folder
+rust/%.o: rust/checks/errors/privacy/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)
+
+# build rust/metadata files in rust folder
+rust/%.o: rust/metadata/%.cc
+	$(COMPILE) $(RUST_CXXFLAGS) $(RUST_INCLUDES) $<
+	$(POSTCOMPILE)