bypass _FORTIFY_SOURCE=3

setup.py

@@ -422,6 +422,15 @@ def readlists(name, prefix):
     cxxabi = toolchain_macros.get('_GLIBCXX_USE_CXX11_ABI') or '0'
     cxxdefs += [('_GLIBCXX_USE_CXX11_ABI', cxxabi)]
 
+    # detect _FORTIFY_SOURCE level
+    # note: gcc only injects this builtin macro when optimiation enabled
+    fortify_source, = probe.eval_macros(['_FORTIFY_SOURCE'], extra_postargs=['-O2'], language='c++').values()
+    print('Detect _FORTIFY_SOURCE', fortify_source)
+    if fortify_source not in (None, '0', '1', '2'):
+        # https://github.com/epics-base/epics-base/issues/514
+        # bypass until patched
+        print('Bypass _FORTIFY_SOURCE')
+        cxxdefs += [('__FORTIFY_SOURCE',), ('_FORTIFY_SOURCE', '2')]
 
 modules = []
 headers = ['epicsVersion.h']