From c4998b99e1142924292773d13bca50d0e2626a99 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Mon, 16 Dec 2024 18:35:17 -0500
Subject: Makefile: remove GNU make specific constructs

---
 Makefile | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile
index f7d2c72..90cbc1b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,12 @@
 # Makefile for uxd, by B. Watson. WTFPL.
-# Requires GNU make aka gmake. BSD make won't work, sorry.
+# Tested with GNU make, BSD make, makepp, and Schily's dmake and smake.
 
 ### Override these variables as needed. Don't override CFLAGS; use
 #   MYCFLAGS instead.
 MYCFLAGS=-O2 -fPIC
+LDFLAGS=
+LIBS=
+RST2MAN=rst2man
 
 #   These only affect the 'install' target (they don't get compiled
 #   into the binary).
@@ -25,12 +28,14 @@ VERSION=0.1.0
 DEFINES=-DVERSION='"$(VERSION)"'
 WARNFLAGS=-std=c89 -Wall -pedantic -Wextra
 CFLAGS=$(DEFINES) $(WARNFLAGS) $(MYCFLAGS)
+SRCS=uxd.c getopt.c usage.c
 
 .PHONY: all test man clean install g++ clang++ clang
 
 all: uxd man
 
-uxd: uxd.c getopt.c usage.c
+uxd: $(SRCS)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o uxd $(SRCS) $(LIBS)
 
 usage.c: uxd.rst mkusage.pl
 	perl mkusage.pl uxd.rst > usage.c
@@ -38,9 +43,7 @@ usage.c: uxd.rst mkusage.pl
 install: all
 	mkdir -p $(DESTDIR)$(BINDIR) $(DESTDIR)$(MAN1DIR)
 	$(INSTALL_DATA) uxd.1 $(DESTDIR)$(MAN1DIR)
-ifeq ($(GZIP_MAN),yes)
-	$(GZIP) $(DESTDIR)$(MAN1DIR)/uxd.1
-endif
+	[ "$(GZIP_MAN)" = "yes" ] && $(GZIP) $(DESTDIR)$(MAN1DIR)/uxd.1 || true
 	$(INSTALL_PROGRAM) uxd $(DESTDIR)$(BINDIR)
 
 test: uxd
@@ -49,13 +52,16 @@ test: uxd
 man: uxd.1
 
 uxd.1: uxd.rst ver.rst
-	rst2man uxd.rst > uxd.1
+	$(RST2MAN) uxd.rst > uxd.1
 
 ver.rst:
 	echo '.. |version| replace:: $(VERSION)' > ver.rst
 
 clean:
-	rm -f uxd
+	rm -f uxd *.o
+
+realclean: clean
+	rm -f uxd.1 usage.c
 
 # the rest of the targets are for portability testing.
 
-- 
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