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

build() {
cd m4-$version

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
}
