--- tcl8.5-8.5.14/debian/rules  2013-06-26 07:50:45.000000000 +0000
+++ tcl8.5/debian/rules 2013-08-09 16:44:02.526892846 +0000
@@ -6,6 +6,13 @@
 DPKG_EXPORT_BUILDFLAGS = 1
 include /usr/share/dpkg/buildflags.mk
 
+DEB_BUILD_GNU_TYPE = $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
+DEB_HOST_GNU_TYPE = $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
+ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+       export ac_cv_func_strtod=yes
+       export tcl_cv_strtod_buggy=1
+endif
+
 LDFLAGS = $(shell dpkg-buildflags --get LDFLAGS)
 export LDFLAGS