From 6cd5f7028647a88935ec1f7776a08b51eb0fb1c8 Mon Sep 17 00:00:00 2001
From: illiliti <illiliti@dimension.sh>
Date: Wed, 1 Jun 2022 07:43:09 +0300
Subject: Makefile: POSIXify

Makefile now compatible with gmake, bmake, smake and pdpmake.
---
 .gitignore       |  3 ++-
 Makefile         | 53 ++++++++++++++++++++++-------------------------------
 README           | 10 ++++------
 minic/mcc        |  2 +-
 tools/abifuzz.sh |  2 +-
 tools/cra.sh     |  2 +-
 tools/test.sh    |  4 ++--
 7 files changed, 33 insertions(+), 43 deletions(-)

diff --git a/.gitignore b/.gitignore
index c466bca..afd08d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
-obj
+*.o
+qbe
 config.h
 .comfile
 *.out
diff --git a/Makefile b/Makefile
index 3738a5f..090f5cb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
-BIN = qbe
+.POSIX:
+.SUFFIXES: .o .c
 
-V = @
-OBJDIR = obj
-PREFIX ?= /usr/local
+PREFIX = /usr/local
+BINDIR = $(PREFIX)/bin
 
 SRC      = main.c util.c parse.c cfg.c mem.c ssa.c alias.c load.c copy.c \
            fold.c live.c spill.c rega.c gas.c
@@ -11,33 +11,24 @@ ARM64SRC = arm64/targ.c arm64/abi.c arm64/isel.c arm64/emit.c
 RV64SRC  = rv64/targ.c rv64/abi.c rv64/isel.c rv64/emit.c
 SRCALL   = $(SRC) $(AMD64SRC) $(ARM64SRC) $(RV64SRC)
 
-AMD64OBJ = $(AMD64SRC:%.c=$(OBJDIR)/%.o)
-ARM64OBJ = $(ARM64SRC:%.c=$(OBJDIR)/%.o)
-RV64OBJ  = $(RV64SRC:%.c=$(OBJDIR)/%.o)
-OBJ      = $(SRC:%.c=$(OBJDIR)/%.o) $(AMD64OBJ) $(ARM64OBJ) $(RV64OBJ)
+AMD64OBJ = $(AMD64SRC:.c=.o)
+ARM64OBJ = $(ARM64SRC:.c=.o)
+RV64OBJ  = $(RV64SRC:.c=.o)
+OBJ      = $(SRC:.c=.o) $(AMD64OBJ) $(ARM64OBJ) $(RV64OBJ)
 
-CFLAGS += -Wall -Wextra -std=c99 -g -pedantic
+CFLAGS = $(CPPFLAGS) -Wall -Wextra -std=c99 -g -Wpedantic
 
-$(OBJDIR)/$(BIN): $(OBJ) $(OBJDIR)/timestamp
-	@test -z "$(V)" || echo "ld $@"
-	$(V)$(CC) $(LDFLAGS) $(OBJ) -o $@
+qbe: $(OBJ)
+	$(CC) $(LDFLAGS) $(OBJ) -o $@
 
-$(OBJDIR)/%.o: %.c $(OBJDIR)/timestamp
-	@test -z "$(V)" || echo "cc $<"
-	$(V)$(CC) $(CFLAGS) -c $< -o $@
-
-$(OBJDIR)/timestamp:
-	@mkdir -p $(OBJDIR)
-	@mkdir -p $(OBJDIR)/amd64
-	@mkdir -p $(OBJDIR)/arm64
-	@mkdir -p $(OBJDIR)/rv64
-	@touch $@
+.c.o:
+	$(CC) $(CFLAGS) -c $< -o $@
 
 $(OBJ): all.h ops.h
 $(AMD64OBJ): amd64/all.h
 $(ARM64OBJ): arm64/all.h
 $(RV64OBJ): rv64/all.h
-$(OBJDIR)/main.o: config.h
+main.o: config.h
 
 config.h:
 	@case `uname` in                               \
@@ -61,26 +52,26 @@ config.h:
 		;;                                     \
 	esac > $@
 
-install: $(OBJDIR)/$(BIN)
-	mkdir -p "$(DESTDIR)/$(PREFIX)/bin/"
-	cp $< "$(DESTDIR)/$(PREFIX)/bin/"
+install: qbe
+	mkdir -p "$(DESTDIR)/$(BINDIR)"
+	cp qbe "$(DESTDIR)/$(BINDIR)/qbe"
 
 uninstall:
-	rm -f "$(DESTDIR)/$(PREFIX)/bin/$(BIN)"
+	rm -f "$(DESTDIR)/$(BINDIR)/qbe"
 
 clean:
-	rm -fr $(OBJDIR)
+	rm -f *.o */*.o qbe
 
 clean-gen: clean
 	rm -f config.h
 
-check: $(OBJDIR)/$(BIN)
+check: qbe
 	tools/test.sh all
 
-check-arm64: $(OBJDIR)/$(BIN)
+check-arm64: qbe
 	TARGET=arm64 tools/test.sh all
 
-check-rv64: $(OBJDIR)/$(BIN)
+check-rv64: qbe
 	TARGET=rv64 tools/test.sh all
 
 src:
diff --git a/README b/README
index bc8a65e..69d0aa9 100644
--- a/README
+++ b/README
@@ -12,9 +12,7 @@ The LICENSE file applies to all files distributed.
 
 - Compilation and Installation
 
-Invoke GNU make in this directory to create the executable
-file obj/qbe.  On some systems (BSD) you might have to use
-'gmake' instead of 'make'.  Install using 'make install',
-the standard DESTDIR and PREFIX environment variables are
-supported.  Alternatively, you may simply copy the obj/qbe
-binary manually.
+Invoke make in this directory to create the executable
+file qbe.  Install using 'make install', the standard
+DESTDIR and PREFIX environment variables are supported.
+Alternatively, you may simply copy the qbe binary manually.
diff --git a/minic/mcc b/minic/mcc
index 77d3d33..492947e 100755
--- a/minic/mcc
+++ b/minic/mcc
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 DIR=`cd $(dirname $0); pwd`
-QBE=$DIR/../obj/qbe
+QBE=$DIR/../qbe
 
 usage()
 {
diff --git a/tools/abifuzz.sh b/tools/abifuzz.sh
index e715b3d..add56eb 100755
--- a/tools/abifuzz.sh
+++ b/tools/abifuzz.sh
@@ -2,7 +2,7 @@
 
 OCAMLC=${OCAMLC:-/usr/bin/ocamlc}
 DIR=`cd $(dirname "$0"); pwd`
-QBE=$DIR/../obj/qbe
+QBE=$DIR/../qbe
 
 failure() {
 	echo "Failure at stage:" $1 >&2
diff --git a/tools/cra.sh b/tools/cra.sh
index 762ab76..5988267 100755
--- a/tools/cra.sh
+++ b/tools/cra.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 DIR=`cd $(dirname "$0"); pwd`
-QBE=$DIR/../obj/qbe
+QBE=$DIR/../qbe
 BUGF=/tmp/bug.id
 FIND=$1
 FIND=${FIND:-afl-find}
diff --git a/tools/test.sh b/tools/test.sh
index 15cff88..536d240 100755
--- a/tools/test.sh
+++ b/tools/test.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
 dir=`cd $(dirname "$0"); pwd`
-bin=$dir/../obj/qbe
-binref=$dir/../obj/qbe.ref
+bin=$dir/../qbe
+binref=$dir/../qbe.ref
 
 tmp=/tmp/qbe.zzzz
 
-- 
cgit 1.4.1