current directory: /usr/local/share/gems/gems/ffi-1.9.21/ext/ffi_c
make "DESTDIR="
Running autoreconf for libffi
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
configure.ac:376: warning: AC_PROG_LD is m4_require'd but not m4_defun'd
acinclude.m4:251: LIBFFI_CHECK_LINKER_FEATURES is expanded from...
acinclude.m4:349: LIBFFI_ENABLE_SYMVERS is expanded from...
configure.ac:376: the top level
configure.ac:376: warning: AC_PROG_LD is m4_require'd but not m4_defun'd
acinclude.m4:251: LIBFFI_CHECK_LINKER_FEATURES is expanded from...
acinclude.m4:349: LIBFFI_ENABLE_SYMVERS is expanded from...
configure.ac:376: the top level
autoreconf: configure.ac: tracing
configure.ac:376: warning: AC_PROG_LD is m4_require'd but not m4_defun'd
acinclude.m4:251: LIBFFI_CHECK_LINKER_FEATURES is expanded from...
acinclude.m4:349: LIBFFI_ENABLE_SYMVERS is expanded from...
configure.ac:376: the top level
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.ac:376: warning: AC_PROG_LD is m4_require'd but not m4_defun'd
acinclude.m4:251: LIBFFI_CHECK_LINKER_FEATURES is expanded from...
acinclude.m4:349: LIBFFI_ENABLE_SYMVERS is expanded from...
configure.ac:376: the top level
configure.ac:41: error: possibly undefined macro: AC_PROG_LIBTOOL
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure:7612: error: possibly undefined macro: AC_PROG_LD
autoreconf: /usr/bin/autoconf failed with exit status: 1
libffi.mk:6: recipe for target '"/usr/local/share/gems/gems/ffi-1.9.21/ext/ffi_c/libffi-x86_64-linux"/.libs/libffi_convenience.a' failed
make: *** ["/usr/local/share/gems/gems/ffi-1.9.21/ext/ffi_c/libffi-x86_64-linux"/.libs/libffi_convenience.a] Error 1