tree 88a0f66230afd6b348d5a4582af34e9940403023
parent 62a012b0f40658fe6a5e75a7d6373080dcbcc5dd
author Jessica Clarke <jrtc27@jrtc27.com> 1628191545 +0100
committer Michael Roth <michael.roth@amd.com> 1635354090 -0500

Partially revert "build: -no-pie is no functional linker flag"

This partially reverts commit bbd2d5a8120771ec59b86a80a1f51884e0a26e53.

This commit was misguided and broke using --disable-pie on any distro
that enables PIE by default in their compiler driver, including Debian
and its derivatives. Whilst -no-pie is not a linker flag, it is a
compiler driver flag that ensures -pie is not automatically passed by it
to the linker. Without it, all compile_prog checks will fail as any code
built with the explicit -fno-pie will fail to link with the implicit
default -pie due to trying to use position-dependent relocations. The
only bug that needed fixing was LDFLAGS_NOPIE being used as a flag for
the linker itself in pc-bios/optionrom/Makefile.

Note this does not reinstate exporting LDFLAGS_NOPIE, as it is unused,
since the only previous use was the one that should not have existed. I
have also updated the comment for the -fno-pie and -no-pie checks to
reflect what they're actually needed for.

Fixes: bbd2d5a8120771ec59b86a80a1f51884e0a26e53
Cc: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Michael Roth <michael.roth@amd.com>