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With GCCPIE being enabled by default with security_flags.inc the compiler will by default attempt to compile and link programs as PIE. The targets that use newlib and baremetal in general do not support PIE or are otherwise unable to use it due to how embedded targets are compiled and executed. As such it makes sense to disable PIE by default for these libc's in order to prevent build failures. For baremetal tclibc there are no libc features or implementation as such there is no implementation for the strong stack protector by default. (From OE-Core rev: dfe434b793c156a87b5ead5cb85fe60d920d69d3) Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>