[PATCH] libstdc++: correct symbol version of typeinfo for bfloat16_t on RISC-V

[Andreas Schwab]

RISC-V only gained support for bfloat16_t after gcc 14.  Passes
libstdc++/check_abi on {x86_64,aarch64,ppc64le,riscv64,s390x}-suse-linux.

        PR libstdc++/118563
        * testsuite/util/testsuite_abi.cc (check_version): Add
        CXXABI_1.3.16.
        * config/abi/pre/gnu.ver (CXXABI_1.3.14) [__riscv]: Exclude
        typeinfo for bfloat16_t.
        (CXXABI_1.3.16) [__riscv]: Add it here.
---
 libstdc++-v3/config/abi/pre/gnu.ver          | 23 ++++++++++++++++----
 libstdc++-v3/testsuite/util/testsuite_abi.cc |  1 +
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/config/abi/pre/gnu.ver 
b/libstdc++-v3/config/abi/pre/gnu.ver
index f7641974ec4..84ce874fe03 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -2852,10 +2852,15 @@ CXXABI_1.3.13 {
 CXXABI_1.3.14 {
 
     # typeinfo for _Float{16,32,64,128,32x,64x,128x} and
-    # __bf16
-    _ZTIDF[0-9]*[_bx];
-    _ZTIPDF[0-9]*[_bx];
-    _ZTIPKDF[0-9]*[_bx];
+    # __bf16/bfloat16_t
+    _ZTIDF[0-9]*[_x];
+    _ZTIPDF[0-9]*[_x];
+    _ZTIPKDF[0-9]*[_x];
+#ifndef __riscv
+    _ZTIDF16b;
+    _ZTIPDF16b;
+    _ZTIPKDF16b;
+#endif
     _ZTIu6__bf16;
     _ZTIPu6__bf16;
     _ZTIPKu6__bf16;
@@ -2869,6 +2874,16 @@ CXXABI_1.3.15 {
 
 } CXXABI_1.3.14;
 
+CXXABI_1.3.16 {
+
+#ifdef __riscv
+    _ZTIDF16b;
+    _ZTIPDF16b;
+    _ZTIPKDF16b;
+#endif
+
+} CXXABI_1.3.15;
+
 # Symbols in the support library (libsupc++) supporting transactional memory.
 CXXABI_TM_1 {
 
diff --git a/libstdc++-v3/testsuite/util/testsuite_abi.cc 
b/libstdc++-v3/testsuite/util/testsuite_abi.cc
index dcf5b1a4e0b..0d6080fb92c 100644
--- a/libstdc++-v3/testsuite/util/testsuite_abi.cc
+++ b/libstdc++-v3/testsuite/util/testsuite_abi.cc
@@ -237,6 +237,7 @@ check_version(symbol& test, bool added)
       known_versions.push_back("CXXABI_1.3.13");
       known_versions.push_back("CXXABI_1.3.14");
       known_versions.push_back("CXXABI_1.3.15");
+      known_versions.push_back("CXXABI_1.3.16");
       known_versions.push_back("CXXABI_IEEE128_1.3.13");
       known_versions.push_back("CXXABI_TM_1");
       known_versions.push_back("CXXABI_FLOAT128");
-- 
2.48.1


-- 
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."