Error building Subversion 1.7.4 - Security.h can't be found.

[francisderive@…]

:info:build subversion/libsvn_subr/macos_keychain.c:41:10: fatal error: 'Security/Security.h' file not found :info:build #include <Security/Security.h> :info:build ^{:info:build 1 error generated. :info:build make: * [subversion/libsvn_subr/macos_keychain.lo] Error 1}

In the subversion-1.7.4.tar expanded download I see this in the file macos_keychain.c:41:10

#ifdef SVN_HAVE_KEYCHAIN_SERVICES

#include <Security/Security.h>

So it appears that SVN_HAVE_KEYCHAIN_SERVICES might be defined - seems accurate - and Security.h can't be found : How to ?