Default Debian/Ubuntu cross compiler did not had hardening support enabled but this got changed in gcc-4.6 4.6.2-6 version. Due to this eglibc is no longer cross buildable as "-fno-stack-protector -U_FORTIFY_SOURCE" are set only for native builds.
This change sets those flags for both native and cross builds. I am not subscribed to ML.
=== modified file 'debian/rules' --- debian/rules 2011-08-09 20:34:55 +0000 +++ debian/rules 2011-12-07 12:56:21 +0000 @@ -109,9 +109,6 @@ slibdir=/lib/$(DEB_HOST_MULTIARCH) libdir=/usr/lib/$(DEB_HOST_MULTIARCH) -BUILD_CC = gcc-4.6 -fno-stack-protector -U_FORTIFY_SOURCE -BUILD_CXX = g++-4.6 -fno-stack-protector -U_FORTIFY_SOURCE - RUN_TESTSUITE = yes # Set CC and CXX for cross-compiling @@ -119,10 +116,13 @@ CC = $(DEB_HOST_GNU_TYPE)-gcc CXX = $(DEB_HOST_GNU_TYPE)-g++ else -CC = $(BUILD_CC) -CXX = $(BUILD_CXX) +CC = gcc-4.6 +CXX = g++-4.6 endif +CC += -fno-stack-protector -U_FORTIFY_SOURCE +CXX += -fno-stack-protector -U_FORTIFY_SOURCE + BUILD_CFLAGS = -O2 -g HOST_CFLAGS = -pipe -O2 -fstrict-aliasing -g $(call xx,extra_cflags)
