Add starter rust makefile

makefile.basic_rust

@@ -0,0 +1,142 @@
+#This program 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 of the License, or
+#(at your option) any later version.
+
+#This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+#Copyright 2021 rexy712
+
+#Makefile to generate a single executable from rust source
+
+ifeq ($(OS),Windows_NT)
+	WINDOWS::=1
+endif
+
+MAIN_SOURCE_FILE::=src/hello.rs
+DEPDIR::=dep
+LIBDIRS::=lib
+LDLIBS::=
+LDFLAGS::=
+RUSTFLAGS::=
+DEBUG_RUSTFLAGS::=
+MAIN_EXECUTABLE::=tester
+RELEASE?=0
+SAVEFLAGS?=1
+
+RUSTC::=rustc
+
+ifeq ($(WINDOWS),1)
+	MAIN_EXECUTABLE::=$(MAIN_EXECUTABLE).exe
+endif
+
+.PHONY: all
+#prerun targets
+all::
+
+#main target
+all:: | flags-update $(MAIN_EXECUTABLE)
+
+#postrun targets
+all::
+
+#custom clean targets
+clean::
+
+###########################################################################################################
+#Everything past this point is internal BS, probably best not to touch it unless you know what you're doing
+
+#set the default target as the default target, otherwise the topmost target will run
+.DEFAULT_GOAL::=all
+
+#system dependant bullshit
+ifeq ($(OS),Windows_NT)
+	#windows' cmd commands
+	mkdir=mkdir $(subst /,\,$(1)) > NUL 2>&1
+	rm=del /F $(1) > NUL 2>&1
+	rmdir=rd /S /Q $(1) > NUL 2>&1
+	move=move /Y $(subst /,\,$(1)) $(subst /,\,$(2)) > NUL 2>&1
+	copy=copy /Y /B $(subst /,\,$(1)) $(subst /,\,$(2)) > NUL 2>&1
+else
+	#*nix terminal commands
+	mkdir=mkdir -p $(1)
+	rm=rm -f $(1)
+	rmdir=rm -rf $(1)
+	move=mv $(1) $(2)
+	copy=cp $(1) $(2)
+endif
+
+#Rust is weird and should only need one depfile for a whole project since the compiler auto imports stuff
+MAIN_DEP_FILE::=$(DEPDIR)/$(notdir $(addsuffix .d,$(MAIN_SOURCE_FILE)))
+
+ALL_LDFLAGS+=$(LDFLAGS) $(foreach dir,$(LIBDIRS),-L'$(dir)') $(foreach lib,$(LDLIBS),"--extern $(lib)")
+
+ifneq ($(RELEASE),1)
+	RUSTFLAGS+=$(DEBUG_RUSTFLAGS)
+endif
+ifeq ($(RELEASE),1)
+	RUSTFLAGS+=-O
+else
+	RUSTFLAGS+=-g
+endif
+
+COMPILER::=$(RUSTC)
+
+#setup temp files for storing compile and link flags
+ifeq ($(SAVEFLAGS),1)
+	RUSTFLAGS_TMPFILE::=.rustflags.tmp
+	LDFLAGS_TMPFILE::=.ldflags.tmp
+	OLD_COMPILEFLAGS::=$(file <$(RUSTFLAGS_TMPFILE))
+	OLD_LINKFLAGS::=$(file <$(LDFLAGS_TMPFILE))
+endif
+
+#Compile all the rust 'crates'
+$(MAIN_EXECUTABLE): $(MAIN_SOURCE_FILE) $(MAIN_DEP_FILE) $(LDFLAGS_TMPFILE)
+	$(COMPILER) $< $(RUSTFLAGS) -o $@ $(ALL_LDFLAGS)
+#create a dependency tracking file so that the project rebuilds when any dep is updated
+$(MAIN_DEP_FILE): $(MAIN_SOURCE_FILE) $(DEPDIR) $(RUSTFLAGS_TMPFILE)
+	$(COMPILER) $< --emit dep-info $(RUSTFLAGS) -o $@
+
+$(DEPDIR):
+	$(call mkdir,"$(DEPDIR)")
+
+.PHONY: flags-update
+flags-update: rustflags-update ldflags-update
+
+#Check if compile flags have changed since last build
+.PHONY: rustflags-update
+rustflags-update:
+ifeq ($(SAVEFLAGS),1)
+ifneq ($(OLD_COMPILEFLAGS),$(RUSTFLAGS))
+	$(file >$(RUSTFLAGS_TMPFILE),$(RUSTFLAGS))
+endif
+$(RUSTFLAGS_TMPFILE): rustflags-update
+endif
+#Check if link flags have changed since last build
+.PHONY: ldflags-update
+ldflags-update:
+ifeq ($(SAVEFLAGS),1)
+ifneq ($(ALL_LDFLAGS),$(OLD_LINKFLAGS))
+	$(file >$(LDFLAGS_TMPFILE),$(ALL_LDFLAGS))
+endif
+$(LDFLAGS_TMPFILE): ldflags-update
+endif
+
+.PHONY: clean
+clean::
+	$(call rm,"$(MAIN_EXECUTABLE)")
+	$(call rm,"$(MAIN_EXECUTABLE).exe")
+	$(call rmdir,"$(DEPDIR)")
+ifeq ($(SAVEFLAGS),1)
+	$(call rm,"$(RUSTFLAGS_TMPFILE)")
+	$(call rm,"$(LDFLAGS_TMPFILE)")
+endif
+
+#include rules from generated depfiles
+-include $(wildcard $(DEPDIR)/*.d)