Specify _FORTIFY_SOURCE=3 (#2168)
This can find more kinds of buffer overflows: https://developers.redhat.com/articles/2022/09/17/gccs-new-fortification-level
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@ -34,7 +34,7 @@ AC_CHECK_HEADERS([attr/xattr.h])
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AC_CHECK_HEADERS([sys/extattr.h])
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AC_CHECK_HEADERS([sys/extattr.h])
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AC_CHECK_FUNCS([fallocate])
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AC_CHECK_FUNCS([fallocate])
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CXXFLAGS="$CXXFLAGS -Wall -fno-exceptions -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2"
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CXXFLAGS="$CXXFLAGS -Wall -fno-exceptions -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=3"
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dnl ----------------------------------------------
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dnl ----------------------------------------------
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dnl For macOS
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dnl For macOS
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