Restructure

sysa/m4-1.4/m4-1.4.kaem

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+set -ex
+
+cd build
+
+# Extract
+gunzip ../src/${pkg}.tar.gz
+tar xf ../src/${pkg}.tar
+cd ${pkg}
+cp ../../mk/main.mk Makefile
+
+# Patch and prepare
+patch -Np0 -i ../../patches/signal-include.patch
+
+# Build
+make
+
+# Install
+cp m4 /after/bin/m4
+chmod 755 /after/bin/m4
+
+# Test
+m4 --version
+
+cd ../..

sysa/m4-1.4/mk/main.mk

@@ -0,0 +1,28 @@
+PRODUCT = m4
+VERSION = 1.4
+
+CC      = tcc
+LD      = tcc
+AR      = tcc -ar
+
+CFLAGS  = -I lib \
+          -DPRODUCT=\"$(PRODUCT)\" \
+          -DVERSION=\"$(VERSION)\"
+
+LDFLAGS = -L . -lm4
+
+.PHONY: all
+
+LIB_SRC = regex getopt getopt1 error obstack xmalloc xstrdup
+LIB_OBJECTS = $(addprefix lib/, $(addsuffix .o, $(LIB_SRC)))
+
+M4_SRC = m4 builtin debug eval format freeze input macro output path symtab
+M4_OBJ = $(addprefix src/, $(addsuffix .o, $(M4_SRC)))
+
+all: m4
+
+m4: libm4.a $(M4_OBJ)
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+libm4.a: $(LIB_OBJECTS)
+	$(AR) cr $@ $(LIB_OBJECTS)

sysa/m4-1.4/patches/signal-include.patch

@@ -0,0 +1,12 @@
+diff -r -U3 m4-1.4/src/m4.c m4-1.4-patched/src/m4.c
+--- src/m4.c	1994-11-02 03:14:28.000000000 +0000
++++ src/m4.c	2021-01-15 00:19:21.947654461 +0000
+@@ -19,7 +19,7 @@
+ #include "m4.h"
+ 
+ #include <getopt.h>
+-#include <sys/signal.h>
++#include <signal.h>
+ 
+ static void usage _((int));
+