***** aclocal ***** ***** PWD: /var/tmp/portage/sci-libs/fftw-3.3.3-r3/work/fftw-3.3.3 ***** aclocal -I m4 configure.ac:10: error: 'AM_CONFIG_HEADER': this macro is obsolete. You should use the 'AC_CONFIG_HEADERS' macro instead. /usr/share/aclocal-1.13/obsolete-err.m4:12: AM_CONFIG_HEADER is expanded from... configure.ac:10: the top level autom4te-2.69: /usr/bin/m4 failed with exit status: 1 aclocal-1.13: error: echo failed with exit status: 1