From 479b2ee8e0cc52c3e76c7c09d0dfa5d902e50ec5 Mon Sep 17 00:00:00 2001
From: Alessandro Iezzi <aiezzi@alessandroiezzi.it>
Date: Tue, 7 Feb 2023 12:34:44 +0100
Subject: Rewrite build system

---
 Makefile  | 44 ++++++++++++++++++++++++++++++--------------
 config.mk |  8 ++++++++
 makemk    | 29 +++++++++++++++++++++++++++++
 target.mk |  8 ++++++++
 4 files changed, 75 insertions(+), 14 deletions(-)
 create mode 100644 config.mk
 create mode 100755 makemk
 create mode 100644 target.mk

diff --git a/Makefile b/Makefile
index 7674ac9..826621d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,35 +1,51 @@
 # See LICENSE file for copyright and license details.
 
+include config.mk
+
 CC   = cc
-SRC != find src -name '*.c'
+
+# Used for debugging and not as usual
 OBJ  = ${SRC:.c=.o}
 
 LIBNAME = libstr
 LIBVER  = 0.0.0-a1
 
-CFLAGS  = -Wall -ansi --std=c89 -pedantic ${OPT} -DLIBVER=\"${LIBVER}\"
+OPTIM   = -O2 -pipe
+STD     = -ansi --std=c89 -pedantic
+WARNS   = -Werror -Wall
+
 LDFLAGS =
+CFLAGS  = ${WARNS} ${STD} -DLIBVER=\"${LIBVER}\" ${OPTIM}
 
-dist:
-	@make OPT='-O2 -pipe -Werror' all
+# CFLAGS for debugging
+CDFLAGS = ${WARNS} ${STD} -DLIBVER=\"${LIBVER}\" -g
 
-debug:
-	@make OPT=-g all
+all: ${LIBNAME:=.a} ${LIBNAME:=.so}
+	@echo ${STD}.
 
-all: ${LIBNAME:=.so} ${LIBNAME:=.a}
+debug: ${OBJ}
 
-${LIBNAME:=.so}: ${OBJ}
-	${CC} ${LDFLAGS} -fPIC -shared ${OBJ} -o $@
+.c.o:
+	${CC} ${CDFLAGS} -c $< -o $@
 
-${LIBNAME:=.a}: ${OBJ}
-	ar rcs $@ ${OBJ}
+# Make shared and archive directories
+${ARDIR} ${SHDIR}:
+	mkdir -p $@
 
-.c.o:
-	${CC} ${CFLAGS} -fPIC -c $< -o $@
+# Make archive file
+${LIBNAME:=.a}: ${ARDIR} ${AROBJ}
+	ar rcs $@ ${AROBJ}
+
+# Make shared file
+${LIBNAME:=.so}: ${SHDIR} ${SHOBJ}
+	${CC} ${LDFLAGS} -shared ${SHOBJ} -o $@
 
 clean:
-	rm -f ${OBJ} ${LIBNAME}.* *.core
+	rm -rf bin ${LIBNAME}.* *.core ${OBJ}
 	cd test && make clean
 
 tests: all
 	cd test && make clean tests
+
+# Generated by makemk script
+include target.mk
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..58fd233
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,8 @@
+# See LICENSE file for copyright and license details.
+
+SRCDIR  = src
+ARDIR   = bin/archive
+SHDIR   = bin/shared
+SRC    != find ${SRCDIR} -name '*.c'
+AROBJ   = ${SRC:${SRCDIR}/%.c=${ARDIR}/%.o}
+SHOBJ   = ${SRC:${SRCDIR}/%.c=${SHDIR}/%.o}
diff --git a/makemk b/makemk
new file mode 100755
index 0000000..0669f81
--- /dev/null
+++ b/makemk
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+MKFILE=target.mk
+SRCDIR=src/
+ARDIR=bin/archive/
+SHDIR=bin/shared/
+
+cat > $MKFILE << EOF
+# See LICENSE file for copyright and license details.
+
+EOF
+
+for srcf in `find $SRCDIR -name '*.c'`
+do
+	TARGETAR=`echo $srcf | sed -E "s|$SRCDIR(.*).c|$ARDIR\1.o|"`
+	TARGETSH=`echo $srcf | sed -E "s|$SRCDIR(.*).c|$SHDIR\1.o|"`
+	LINEAR='${CC} ${CFLAGS} -c '$srcf' -o $@'
+	LINESH='${CC} ${CFLAGS} -fPIC -c '$srcf' -o $@'
+
+cat >> $MKFILE << EOF
+$TARGETAR: $srcf
+	$LINEAR
+
+$TARGETSH: $srcf
+	$LINESH
+
+EOF
+
+done
diff --git a/target.mk b/target.mk
new file mode 100644
index 0000000..2d3e61e
--- /dev/null
+++ b/target.mk
@@ -0,0 +1,8 @@
+# See LICENSE file for copyright and license details.
+
+bin/archive/string2.o: src/string2.c
+	${CC} ${CFLAGS} -c src/string2.c -o $@
+
+bin/shared/string2.o: src/string2.c
+	${CC} ${CFLAGS} -fPIC -c src/string2.c -o $@
+
-- 
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