diff -up Macaulay2-1.4-r12617/configure.ac.orig Macaulay2-1.4-r12617/configure.ac
--- Macaulay2-1.4-r12617/configure.ac.orig	2012-07-01 14:30:32.554485940 -0400
+++ Macaulay2-1.4-r12617/configure.ac	2012-07-01 14:32:25.199490192 -0400
@@ -791,7 +791,7 @@ AC_SUBST(BUILTLIBS,)
 #	it asks questions
 #    normaliz needs mpir providing libgmp and libgmpxx, but we provide that, anyway
 AC_SUBST(PROGLIST, "4ti2 gfan normaliz nauty cddplus lrslib")
-AC_SUBST(LIBLIST, "gc    gdbm    mpir    mpfr    pari    readline    ntl    factory        libfac         lapack    frobby    scscp	glpk    cddlib ")
+AC_SUBST(LIBLIST, "gc    gdbm    gmp    mpfr    pari    readline    ntl    factory        libfac         lapack    frobby    scscp	glpk    cddlib ")
 dnl I think we don't use this:
 dnl AC_SUBST(LIBFILES,"libgc libgdbm libmpir libmpfr libpari libreadline libntl libcf libcfmem libfac libblas liblapack libfrobby libscscp  libglpk ")
 for i in $LIBLIST
@@ -897,16 +897,8 @@ dnl then BUILTLIBS="-lgmpxx -lgmp $BUILT
 dnl else LIBS="-lgmpxx $LIBS"
 dnl fi
 
-if test $BUILD_mpir = no
-then AC_LANG(C)
-     AC_SEARCH_LIBS(__mpir_version,mpir,,BUILD_mpir=yes)
-     AC_CHECK_HEADER(mpir.h,,BUILD_mpir=yes)
-fi
 dnl frobby uses mpirxx
-if test $BUILD_mpir = yes
-then BUILTLIBS="-lmpirxx -lmpir $BUILTLIBS"
-else LIBS="-lmpirxx $LIBS"
-fi
+LIBS="-lgmp -lgmpxx $LIBS"
 
 if test "$PARI" = yes
 then if test $BUILD_pari = no
@@ -971,11 +963,6 @@ AC_SUBST(ULIMIT_S,yes)
 ( ulimit -v 2000 2>/dev/null) || ULIMIT_V=no
 ( ulimit -s 2000 2>/dev/null) || ULIMIT_S=no
 
-AC_SUBST(MPIR_CONFIG_OPTIONS,)
-AC_ARG_WITH(mpir_config_options,
-	AS_HELP_STRING(--with-mpir-config-options=...,specify additional options for the configure script used with mpir),
-	MPIR_CONFIG_OPTIONS=$withval)
-
 if test $BUILD_mpir = yes
 then BUILD_mpfr=yes
 elif test $BUILD_mpfr = no