why does -flto remove stack-protector

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Fedora 21 - GCC 4.9.2

why are shared libraries with -flto no longer have stack protection?
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with -flto

/usr/lib64/httpd/modules/libphp5.so:
 Position Independent Executable: no, regular shared library (ignored)
 Stack protected: no, not found!
 Fortify Source functions: yes (some protected functions found)
 Read-only relocations: yes
 Immediate binding: yes

without -flto

/usr/lib64/httpd/modules/libphp5.so:
 Position Independent Executable: no, regular shared library (ignored)
 Stack protected: yes
 Fortify Source functions: yes (some protected functions found)
 Read-only relocations: yes
 Immediate binding: yes

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