upstream http://bugzilla.scilab.org/show_bug.cgi?id=9824

--- scilab-5.3.2-orig/m4/libsmath.m4	2011-09-19 14:08:11.167292730 -0400
+++ scilab-5.3.2/m4/libsmath.m4	2011-09-19 14:08:26.477292283 -0400
@@ -37,7 +37,6 @@
 AC_PREREQ(2.50)
 AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
 acx_blas_ok=no
-BLAS_LIBS=
 acx_blas_save_LIBS="$LIBS"
 
 AC_ARG_WITH(blas-library,