name=m4
version=1.4.19
source="http://ftp.gnu.org/gnu/m4/m4-$version.tar.xz"

build() {
	cd $name-$version

	# fixes required by glibc-2.28
	sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
	echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h
	
	./configure --prefix=/tools
	make
	make install
}