new utility to generate makefiles with dependencies

1 files changed, 109 insertions, 0 deletions

diff --git a/mkmf.sh b/mkmf.sh
new file mode 100755
index 00000000..8861a7ad
--- /dev/null
+++ b/mkmf.sh
@@ -0,0 +1,109 @@
+#!/bin/sh
+
+classify_source () {
+	NAME=$(basename $1 .c)
+
+	if grep -q "define ${NAME}[ (]" $1; then
+		echo MACRO
+	elif grep -q "typedef.* ${NAME};" $1; then
+		echo TYPE
+	elif grep -q "typedef.*{$" $1; then
+		echo TYPE_LONG
+	elif grep -q "struct.*${NAME} {" $1; then
+		echo STRUCT
+	elif grep -q "union.* ${NAME} {" $1; then
+		echo UNION
+	elif grep -q "^[A-Za-z_].* ${NAME};" $1; then
+		echo EXTERN
+	else
+		echo FUNCTION
+	fi
+}
+
+STANDARD=${1-9899-1990}
+#STANDARD=${1-POSIX.1-1990}
+
+if [ ! -f .dep/to-build ]; then
+	rm -rf .dep Makefile header.mk
+	mkdir -p .dep
+	echo ${STANDARD} > .dep/to-build
+fi
+
+if [ ! -d std/${STANDARD} ]; then
+	printf "Standard %s not found.\n" "${STANDARD}"
+	exit 1
+fi
+
+if [ -f std/${STANDARD}/INCLUDE ]; then
+	for i in $(cat std/${STANDARD}/INCLUDE); do
+		$0 $i
+	done
+fi
+
+rm -f .dep/${STANDARD}.*
+
+for i in $(find std/${STANDARD} -name \*.c); do
+	NAME=$(basename $i .c)
+	TYPE=$(classify_source $i)
+	HEADER=$(sed -ne 's/.*<\(.*\.h\)>.*/\1/p' $i)
+	LIB=$(grep '^LINK(' $i | m4 -DLINK='lib$1')
+	LIB=${LIB:-libc}
+
+	if [ ! -f .dep/${HEADER}.mk ]; then
+		mkdir -p $(dirname .dep/${HEADER}.mk)
+		printf '$(INCDIR)/%s:' "${HEADER}" > .dep/${HEADER}.mk
+	fi
+	printf ' \\\n\t%s' "$i" >> .dep/${HEADER}.mk
+
+	if [ ${TYPE} = EXTERN -o ${TYPE} = FUNCTION ]; then
+		printf '$(OBJDIR)/%s.o: %s $(INCDIR)/%s' ${NAME} $i ${HEADER}> .dep/${NAME}.o.mk
+		for j in $(grep include $i); do
+			: # TODO: add each header to depends file here
+		done
+		printf '\n\t-@mkdir -p $(OBJDIR)\n\t$(CC) $(CFLAGS) -c %s -o $@\n\n' $i >> .dep/${NAME}.o.mk
+
+		if [ ! -f .dep/${LIB}.a.mk ]; then
+			printf '%s_OBJS =' ${LIB} > .dep/${LIB}.a.mk
+			if [ ${LIB} = libc ]; then
+				printf ' $(OBJDIR)/libc.o $(OBJDIR)/x86-64.o' >> .dep/${LIB}.a.mk
+			fi
+		fi
+		printf ' \\\n\t$(OBJDIR)/%s.o' ${NAME} >> .dep/${LIB}.a.mk
+	fi
+
+done
+
+if [ $(cat .dep/to-build) = ${STANDARD} ]; then
+	printf '.POSIX:\n\n' > Makefile
+	printf 'default: all\n\n' >> Makefile
+	printf 'include config.mk\n\n' >> Makefile
+	printf 'INCLUDES=-I$(INCDIR) -I. -Inonstd/stubs\n' >> Makefile
+	printf 'CFLAGS=$(INCLUDES) -g -fno-builtin -nostdinc -nostdlib -nodefaultlibs -Werror -Wall -Wextra -fPIC\n\n' >> Makefile
+
+	for i in .dep/lib*.a.mk; do
+		LIB=$(basename $i .a.mk)
+		cat $i >> Makefile
+		printf '\n\n%s.a: $(%s_OBJS)\n\t$(AR) r $@ $?\n\n' $LIB $LIB >> Makefile
+	done
+
+	printf '.POSIX:\n\ninclude config.mk\n\n' > headers.mk
+	for i in $(find .dep -name \*.h.mk); do
+		cat $i >> headers.mk
+		printf '\n\t./gen-header $@\n\n' >> headers.mk
+	done
+
+	cat .dep/*.o.mk >> Makefile
+
+	printf '$(OBJDIR)/libc.o: nonstd/libc.c\n\t$(CC) $(CFLAGS) -c $? -o $@\n\n' >> Makefile
+	printf '$(OBJDIR)/x86-64.o: nonstd/x86-64.s\n\t$(CC) $(CFLAGS) -c $? -o $@\n\n' >> Makefile
+
+	printf 'all:' >> Makefile
+	for i in  .dep/lib*.a.mk; do
+		printf ' %s' $(basename $i .mk) >> Makefile
+	done
+	printf '\n\n' >> Makefile
+
+	printf 'clean:\n\trm -rf $(OBJDIR) *.a\n\n' >> Makefile
+	printf 'git-clean: clean\n\trm -rf .dep header.mk Makefile\n\n' >> Makefile
+	
+fi