On Mon, 2012-10-15 at 14:19 +1300, Chris Packham wrote:
> The default behaviour of AC_RUN_IFELSE is to stop with an error if cross
> compiling. Avoid this by providing the optional 4th argument to set
> gcc_supports_pie=no if support for PIE cannot be detected.
Patch has been added to the queue for the next time I commit.
>
> Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
> ---
> This patch was sent privately to Ian but now that I've figured out the
> mailing list address it probably belongs here.
>
> One outstanding problem is for cross compilers who do want -fPIE. One
> possibility would be make gcc_supports_pie ac_cv_gcc_supports_pie which
> would make it over-ridable. I don't think its worth the effort just yet.
>
> configure.in | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/configure.in b/configure.in
> index 1a24e34..90bda62 100644
> --- a/configure.in
> +++ b/configure.in
> @@ -307,7 +307,7 @@ DAEMON_CFLAGS=
> DAEMON_LDFLAGS=
> AC_MSG_CHECKING([whether gcc -fPIE works])
> AC_RUN_IFELSE([AC_LANG_PROGRAM([[]], [[int main(void) {return 0;}]])],
> - [gcc_supports_pie=yes], [gcc_supports_pie=no])
> + [gcc_supports_pie=yes], [gcc_supports_pie=no], [gcc_supports_pie=no])
> AC_MSG_RESULT([$gcc_supports_pie])
> if test $gcc_supports_pie = yes ; then
> DAEMON_CFLAGS="-fPIE"
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