diff -r 3448ac3f1a5d -r 5416f4ba36bf scripts/build/companion_libs/mpfr.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/build/companion_libs/mpfr.sh	Sun May 03 21:10:15 2009 +0000
@@ -0,0 +1,139 @@
+# This file adds the functions to build the MPFR library
+# Copyright 2008 Yann E. MORIN
+# Licensed under the GPL v2. See COPYING in the root of this package
+
+do_mpfr_get() { :; }
+do_mpfr_extract() { :; }
+do_mpfr() { :; }
+do_mpfr_target() { :; }
+
+# Overide function depending on configuration
+if [ "${CT_GMP_MPFR}" = "y" ]; then
+
+# Download MPFR
+do_mpfr_get() {
+    CT_GetFile "mpfr-${CT_MPFR_VERSION}" http://www.mpfr.org/mpfr-current/  \
+                                 http://www.mpfr.org/mpfr-${CT_MPFR_VERSION}/
+}
+
+# Extract MPFR
+do_mpfr_extract() {
+    CT_Extract "mpfr-${CT_MPFR_VERSION}"
+    CT_Patch "mpfr-${CT_MPFR_VERSION}"
+
+    # OK, Gentoo have a sanity check that libtool.m4 and ltmain.sh have the
+    # same version number. Unfortunately, some tarballs of MPFR are not
+    # built sanely, and thus ./configure fails on Gentoo.
+    # See: http://sourceware.org/ml/crossgcc/2008-05/msg00080.html
+    # and: http://sourceware.org/ml/crossgcc/2008-06/msg00005.html
+    # This hack is not bad per se, but the MPFR guys would be better not to
+    # do that in the future...
+    # It seems that MPFR >= 2.4.0 do not need this...
+    case "${CT_MPFR_VERSION}" in
+        1.*|2.0.*|2.1.*|2.2.*|2.3.*)
+            CT_Pushd "${CT_SRC_DIR}/mpfr-${CT_MPFR_VERSION}"
+            if [ ! -f .autotools.ct-ng ]; then
+                CT_DoLog DEBUG "Re-building autotools files"
+                CT_DoExecLog ALL autoreconf -fi
+                # Starting with libtool-1.9f, config.{guess,sub} are no longer
+                # installed without -i, but starting with libtool-2.2.6, they
+                # are no longer removed without -i. Sight... Just use -i with
+                # libtool >=2
+                # See: http://sourceware.org/ml/crossgcc/2008-11/msg00046.html
+                # and: http://sourceware.org/ml/crossgcc/2008-11/msg00048.html
+                libtoolize_opt=
+                case "$(libtoolize --version |head -n 1 |awk '{ print $(NF); }')" in
+                    0.*)    ;;
+                    1.*)    ;;
+                    *)      libtoolize_opt=-i;;
+                esac
+                CT_DoExecLog ALL libtoolize -f ${libtoolize_opt}
+                touch .autotools.ct-ng
+            fi
+            CT_Popd
+            ;;
+    esac
+}
+
+do_mpfr() {
+    mkdir -p "${CT_BUILD_DIR}/build-mpfr"
+    cd "${CT_BUILD_DIR}/build-mpfr"
+
+    CT_DoStep INFO "Installing MPFR"
+
+    mpfr_opt=
+    # Under Cygwin, we can't build a thread-safe library
+    case "${CT_HOST}" in
+        *-cygwin)   mpfr_opt="--disable-thread-safe";;
+        *)          mpfr_opt="--enable-thread-safe";;
+    esac
+
+    CT_DoLog EXTRA "Configuring MPFR"
+    CC="${CT_HOST}-gcc"                                 \
+    CFLAGS="${CT_CFLAGS_FOR_HOST}"                      \
+    CT_DoExecLog ALL                                    \
+    "${CT_SRC_DIR}/mpfr-${CT_MPFR_VERSION}/configure"   \
+        --build=${CT_BUILD}                             \
+        --host=${CT_HOST}                               \
+        --prefix="${CT_PREFIX_DIR}"                     \
+        ${mpfr_opt}                                     \
+        --disable-shared                                \
+        --enable-static                                 \
+        --with-gmp="${CT_PREFIX_DIR}"
+
+    CT_DoLog EXTRA "Building MPFR"
+    CT_DoExecLog ALL make ${PARALLELMFLAGS}
+
+    if [ "${CT_MPFR_CHECK}" = "y" ]; then
+        CT_DoLog EXTRA "Checking MPFR"
+        CT_DoExecLog ALL make ${PARALLELMFLAGS} -s check
+    fi
+
+    CT_DoLog EXTRA "Installing MPFR"
+    CT_DoExecLog ALL make install
+
+    CT_EndStep
+}
+
+if [ "${CT_GMP_MPFR_TARGET}" = "y" ]; then
+
+do_mpfr_target() {
+    mkdir -p "${CT_BUILD_DIR}/build-mpfr-target"
+    cd "${CT_BUILD_DIR}/build-mpfr-target"
+
+    CT_DoStep INFO "Installing MPFR for the target"
+
+    mpfr_opt=
+    # Under Cygwin, we can't build a thread-safe library
+    case "${CT_TARGET}" in
+        *-cygwin)   mpfr_opt="--disable-thread-safe";;
+        *)          mpfr_opt="--enable-thread-safe";;
+    esac
+
+    CT_DoLog EXTRA "Configuring MPFR"
+    CC="${CT_TARGET}-gcc"                               \
+    CFLAGS="${CT_CFLAGS_FOR_TARGET}"                    \
+    CT_DoExecLog ALL                                    \
+    "${CT_SRC_DIR}/mpfr-${CT_MPFR_VERSION}/configure"   \
+        --build=${CT_BUILD}                             \
+        --host=${CT_TARGET}                             \
+        --prefix=/usr                                   \
+        ${mpfr_opt}                                     \
+        --disable-shared                                \
+        --enable-static                                 \
+        --with-gmp="${CT_SYSROOT_DIR}/usr"
+
+    CT_DoLog EXTRA "Building MPFR"
+    CT_DoExecLog ALL make ${PARALLELMFLAGS}
+
+    # Not possible to check MPFR while X-compiling
+
+    CT_DoLog EXTRA "Installing MPFR"
+    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" install
+
+    CT_EndStep
+}
+
+fi # CT_GMP_MPFR_TARGET == y
+
+fi # CT_GMP_MPFR == y