src_prepare() {
distutils_src_prepare
epatch "${FILESDIR}/${PN}-2.1.0-gmp.patch"
sed -i -e 's/defined(_WCHAR_T_DEFINED)/defined(_WCHAR_T_DEFINED) || defined(_WCHAR_T_DECLARED)/' \
"${S}/src/libtom/tomcrypt_pk.h" || die "sed failed"
}
src_configure() {