Applying ./patches/0001-use-autotools.patch using plaintext: 
patching file configure.ac
patching file Makefile.am
autoreconf: export WARNINGS=
autoreconf: Entering directory '.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: /builder/shared-workdir/build/sdk/staging_dir/host/bin/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/host/share/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/hostpkg/share/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/usr/share/aclocal -I m4 -I . --force 
autoreconf: configure.ac: tracing
autoreconf: running: /builder/shared-workdir/build/sdk/staging_dir/host/bin/libtoolize --install --force
OpenWrt-libtoolize: putting auxiliary files in '.'.
OpenWrt-libtoolize: linking file './config.guess'
OpenWrt-libtoolize: linking file './config.sub'
OpenWrt-libtoolize: linking file './install-sh'
OpenWrt-libtoolize: linking file './ltmain.sh'
OpenWrt-libtoolize: Consider adding 'AC_CONFIG_MACRO_DIRS([m4])' to configure.ac,
OpenWrt-libtoolize: and rerunning libtoolize and aclocal.
OpenWrt-libtoolize: Consider adding '-I m4' to ACLOCAL_AMFLAGS in Makefile.am.
autoreconf: configure.ac: not using Intltool
autoreconf: configure.ac: not using Gtkdoc
autoreconf: running: /builder/shared-workdir/build/sdk/staging_dir/host/bin/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/host/share/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/hostpkg/share/aclocal -I /builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/usr/share/aclocal -I m4 -I . --force 
autoreconf: running: /builder/shared-workdir/build/sdk/staging_dir/host/bin/autoconf --include=/builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/host/share/aclocal --include=/builder/shared-workdir/build/sdk/staging_dir/hostpkg/share/aclocal --include=/builder/shared-workdir/build/sdk/staging_dir/target-i386_pentium4_musl/usr/share/aclocal --include=m4 --include=. --prepend-include=/builder/shared-workdir/build/sdk/staging_dir/host/share/aclocal --force
autom4te: error: /builder/shared-workdir/build/staging_dir/host/share/autoconf/autoconf/trailer.m4: no such file or directory
autoreconf: error: /builder/shared-workdir/build/sdk/staging_dir/host/bin/autoconf failed with exit status: 1
configure: unknown option `--target=i486-openwrt-linux'
make[3]: *** [Makefile:75: /builder/shared-workdir/build/sdk/build_dir/target-i386_pentium4_musl/udns-0.4/.configured_68b329da9893e34099c7d8ad5cb9c940] Error 1
time: package/feeds/packages/udns/compile#12.10#1.17#18.47