[gcc r15-1128] libgcc/aarch64: also provide AT_HWCAP2 fallback

[Jan Beulich via Gcc-cvs]

https://gcc.gnu.org/g:48d6d8c9e91018a625a797d50ac4def88376a515

commit r15-1128-g48d6d8c9e91018a625a797d50ac4def88376a515
Author: Jan Beulich <jbeul...@suse.com>
Date:   Mon Jun 10 08:47:58 2024 +0200

    libgcc/aarch64: also provide AT_HWCAP2 fallback
    
    Much like AT_HWCAP is already provided in case the platform headers
    don't have the value (yet).
    
    libgcc/
    
            * config/aarch64/cpuinfo.c: Provide AT_HWCAP2.

Diff:
---
 libgcc/config/aarch64/cpuinfo.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libgcc/config/aarch64/cpuinfo.c b/libgcc/config/aarch64/cpuinfo.c
index 544c5516133..ec36d105738 100644
--- a/libgcc/config/aarch64/cpuinfo.c
+++ b/libgcc/config/aarch64/cpuinfo.c
@@ -146,6 +146,9 @@ struct {
 #define HWCAP_PACG (1UL << 31)
 #endif
 
+#ifndef AT_HWCAP2
+#define AT_HWCAP2 26
+#endif
 #ifndef HWCAP2_DCPODP
 #define HWCAP2_DCPODP (1 << 0)
 #endif