[gcc r14-3688] ada: Pass -msmp when linking for ppc-vx6 --RTS=rtp-smp

[gcc r14-3688] ada: Pass -msmp when linking for ppc-vx6 --RTS=rtp-smp

[Marc Poulhi?s]

https://gcc.gnu.org/g:fd208ccbfcb8562b4302b618b3fc1d2601af17d5

commit r14-3688-gfd208ccbfcb8562b4302b618b3fc1d2601af17d5
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Fri Jul 7 04:02:40 2023 -0300

    ada: Pass -msmp when linking for ppc-vx6 --RTS=rtp-smp
    
    gprbuild and gnatmake won't pass --RTS=rtp-smp to the compiler driver
    for linking.  The flag was not used during linking: the .spec files
    named as linker options were all we passed for the linker to get the
    -L flags for lib_smp and lib.
    
    There was a problem, though: although /lib_smp/ and /lib/ were to be
    searched in this order, and the specs files did that correctly, the
    compiler would search /lib/ first regardless, because
    STARTFILE_PREFIX_SPEC said so, and specs files cannot override that.
    
    With this patch, we make sure the rtp-smp runtime causes -msmp to be
    added to the command line passed to the compiler driver for linking,
    and a corresponding patch for the ppc-vxworks configuration makes the
    GCC compiler driver use this flag to select /lib_smp/ rather than
    /lib/.
    
    gcc/ada/
    
            * libgnat/system-vxworks-ppc-rtp-smp.ads: Add -msmp to
            Linker_Options pragma.

Diff:
---
 gcc/ada/libgnat/system-vxworks-ppc-rtp-smp.ads | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/ada/libgnat/system-vxworks-ppc-rtp-smp.ads b/gcc/ada/libgnat/system-vxworks-ppc-rtp-smp.ads
index d8c498fac7fe..e4b80a8415ee 100644
--- a/gcc/ada/libgnat/system-vxworks-ppc-rtp-smp.ads
+++ b/gcc/ada/libgnat/system-vxworks-ppc-rtp-smp.ads
@@ -120,6 +120,7 @@ package System is
 
 private
 
+   pragma Linker_Options ("-msmp");
    pragma Linker_Options ("--specs=vxworks-smp-ppc-link.spec");
    pragma Linker_Options ("--specs=vxworks-ppc-link.spec");
    --  Setup proper set of -L's for this configuration