Update m4 to 1.4.7

sysa/m4-1.4.7/mk/main.mk

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+CC      = tcc
+AR      = tcc -ar
+
+CFLAGS  = -I lib \
+          -DVERSION=\"1.4.7\" \
+          -DPACKAGE_BUGREPORT=\"bug-m4@gnu.org\" \
+          -DPACKAGE_STRING=\"GNU\ M4\ 1.4.7\" \
+          -DPACKAGE=\"m4\" \
+          -DPACKAGE_NAME=\"GNU\ M4\" \
+          -DHAVE_STDINT_H=1 \
+          -DHAVE___FPENDING=1 \
+          -DHAVE_DECL___FPENDING=1 \
+          -D_GNU_SOURCE=1 \
+          -D_GL_UNUSED= \
+          -D__getopt_argv_const=const \
+          -DSYSCMD_SHELL=\"/bin/sh\"
+
+LDFLAGS = -L . -lm4
+
+.PHONY: all
+
+LIB_SRC = cloexec close-stream dup-safer error exitfail fd-safer fopen-safer getopt getopt1 mkstemp-safer regex obstack tmpfile-safer verror xalloc-die xasprintf xmalloc xvasprintf
+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: src/m4
+
+src/m4: libm4.a $(M4_OBJ)
+	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $@
+
+libm4.a: $(LIB_OBJECTS)
+	$(AR) cr $@ $^
+
+%.o : %.c lib/config.h
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+lib/config.h:
+	touch lib/config.h
+
+install: all
+	install src/m4 $(PREFIX)/bin