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Specify _FORTIFY_SOURCE=3 (#2168)

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This can find more kinds of buffer overflows:

https://developers.redhat.com/articles/2022/09/17/gccs-new-fortification-level
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Andrew Gaul 2023-05-27 17:20:29 +09:00 committed by GitHub
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commit e7a364d610
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configure.ac
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@ -34,7 +34,7 @@ AC_CHECK_HEADERS([attr/xattr.h])
AC_CHECK_HEADERS([sys/extattr.h])
AC_CHECK_FUNCS([fallocate])
CXXFLAGS="$CXXFLAGS -Wall -fno-exceptions -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2"
CXXFLAGS="$CXXFLAGS -Wall -fno-exceptions -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=3"
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