Re: [PATCH] configure: Don't warn about lack of PIE on macOS

[Stefan Hajnoczi]

On Mon, Jun 01, 2020 at 03:42:57PM +0300, Roman Bolshakov wrote:
> ld64 is making PIE executables for 10.7 and above by default, as
> documented in ld(1).
> 
> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
> ---
>  configure | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/configure b/configure
> index af2ba83f0e..6dddbca4b2 100755
> --- a/configure
> +++ b/configure
> @@ -2137,6 +2137,8 @@ elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then
>    QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
>    QEMU_LDFLAGS="-pie $QEMU_LDFLAGS"
>    pie="yes"
> +elif test "$darwin" = "yes"; then
> +  pie="yes"

Hi Roman,
I'm wondering why the elif above doesn't detect the presence of PIE
automatically?

  elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then
    QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
    QEMU_LDFLAGS="-pie $QEMU_LDFLAGS"
    pie="yes"

Can this code be tweaked to cover macOS too?

Also CCing Peter Maydell in case he wants to merge this patch directly
into qemu.git.

Stefan

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