I found the following in configure.ac which unconditionally adds a -Werror flag:
dnl Add -Werror=implicit-function-declaration to CFLAGS CFLAGS_KEEP="$CFLAGS" CFLAGS="$CFLAGS_KEEP -Werror=implicit-function-declaration" AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])], [CFLAGS_KEEP="$CFLAGS"]) CFLAGS="$CFLAGS_KEEP" I'm almost sure this should only be done in maintainer-mode? -- Brane -- Branko Čibej Director of Subversion | WANdisco | www.wandisco.com