diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 3e93a53d3..174f8d4f1 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -6,7 +6,7 @@ AC_DEFUN([ECL_LONG_DOUBLE],[
 if test "$enable_longdouble" != "no" ; then
 AC_CHECK_TYPES([long double],[enable_longdouble=yes],[enable_longdouble=no])
 if test "$enable_longdouble" != "no" ; then
-AC_CHECK_FUNCS([sinl cosl tanl logl expl],[],[enable_longdouble=no; break])
+AC_CHECK_FUNCS([sinl cosl tanl logl expl ldexpl frexpl],[],[enable_longdouble=no; break])
 if test "$enable_longdouble" != "no" ; then
 AC_DEFINE([ECL_LONG_FLOAT], [], [ECL_LONG_FLOAT])
 fi
diff --git a/src/configure b/src/configure
index 0b7d1c72f..eb41506fe 100755
--- a/src/configure
+++ b/src/configure
@@ -8050,7 +8050,7 @@ else
 fi
 
 if test "$enable_longdouble" != "no" ; then
-for ac_func in sinl cosl tanl logl expl
+for ac_func in sinl cosl tanl logl expl ldexpl frexpl
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/src/configure.ac b/src/configure.ac
index 137c8b74b..3cd387e09 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -428,6 +428,8 @@ if test "x${with_system_gmp}" = "xno" ; then
   else
     GMP_ABI="ABI=$ABI"
   fi
+  # Crosscompilation for Android on Darwin requires replacing 'NM=nm'
+  # below with 'NM=$PLATFORM_PREFIX/bin/arm-linux-androideabi-nm'.
   mkdir gmp
   dnl Notice we need -DPIC to force the assembler to generate PIC code
   (destdir=`${PWDCMD}`; cd gmp && CC="${CC} ${PICFLAG}" \
diff --git a/src/ecl/configpre.h b/src/ecl/configpre.h
index 2cbbdc5f3..6e42e2397 100644
--- a/src/ecl/configpre.h
+++ b/src/ecl/configpre.h
@@ -150,6 +150,9 @@
 /* Define to 1 if you have the `frexpf' function. */
 #undef HAVE_FREXPF
 
+/* Define to 1 if you have the `frexpl' function. */
+#undef HAVE_FREXPL
+
 /* Define to 1 if you have the `fseeko' function. */
 #undef HAVE_FSEEKO
 
@@ -183,6 +186,9 @@
 /* Define to 1 if you have the `ldexpf' function. */
 #undef HAVE_LDEXPF
 
+/* Define to 1 if you have the `ldexpl' function. */
+#undef HAVE_LDEXPL
+
 /* HAVE_LIBFFI */
 #undef HAVE_LIBFFI