[gcc r16-1728] libstdc++: Fix Darwin bootstrap by simplifying ver file syntax.

[Iain D Sandoe]

https://gcc.gnu.org/g:5d613f473126772c47180d895b5ca438329534e2

commit r16-1728-g5d613f473126772c47180d895b5ca438329534e2
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Thu Jun 26 23:43:02 2025 +0100

    libstdc++: Fix Darwin bootstrap by simplifying ver file syntax.
    
    The symbol parsing script does not handle the closing brace of a new
    symbol group and the identifier for the inherited group to be on
    different lines, which r16-1708-gaf5b72cf9f564 introduced. Fixed by
    making the conditional encompass both the brace and the identifier.
    
    libstdc++-v3/ChangeLog:
    
            * config/abi/pre/gnu.ver: Keep the closing brace of the
            CXXABI_1.3.17 symbol group together with the identifier
            for the inherited group.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

Diff:
---
 libstdc++-v3/config/abi/pre/gnu.ver | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index bba5705509c6..73b6f338613e 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -2902,11 +2902,10 @@ CXXABI_1.3.16 {
 CXXABI_1.3.17 {
     # std::exception_ptr::_M_exception_ptr_cast
     _ZNKSt15__exception_ptr13exception_ptr21_M_exception_ptr_castERKSt9type_info;
-}
 #ifdef __riscv
-CXXABI_1.3.16;
+} CXXABI_1.3.16;
 #else
-CXXABI_1.3.15;
+} CXXABI_1.3.15;
 #endif
 
 # Symbols in the support library (libsupc++) supporting transactional memory.