[gcc r17-2299] nvptx: Resolve 'flexible_array_member_type_p' conflict

https://gcc.gnu.org/g:44bf2e20c4eef737d461bfa566e78aaa3ad59948

commit r17-2299-g44bf2e20c4eef737d461bfa566e78aaa3ad59948
Author: Thomas Schwinge <[email protected]>
Date:   Fri Jul 10 00:52:46 2026 +0200

    nvptx: Resolve 'flexible_array_member_type_p' conflict
    
        [...]/source-gcc/gcc/config/nvptx/nvptx.cc:2485:1: error: ‘bool flexible_array_member_type_p(const_tree)’ was declared ‘extern’ and later ‘static’ [-fpermissive]
         2485 | flexible_array_member_type_p (const_tree type)
              | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
        In file included from [...]/source-gcc/gcc/config/nvptx/nvptx.cc:30:
        [...]/source-gcc/gcc/tree.h:7022:13: note: previous declaration of ‘bool flexible_array_member_type_p(const_tree)’
         7022 | extern bool flexible_array_member_type_p (const_tree);
              |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    That's due to recent commit ed1d15e94f5ce28a9fdba6e3b255efef420c93f0
    "c: harmonize checking for flex array member type".
    
            gcc/
            * config/nvptx/nvptx.cc (flexible_array_member_type_p): Rename to
            'nvptx_flexible_array_member_type_p'.

Diff:
---
 gcc/config/nvptx/nvptx.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/nvptx/nvptx.cc b/gcc/config/nvptx/nvptx.cc
index a23206910dc4..fb76e7813507 100644
--- a/gcc/config/nvptx/nvptx.cc
+++ b/gcc/config/nvptx/nvptx.cc
@@ -2482,7 +2482,7 @@ nvptx_output_ascii (FILE *, const char *str, unsigned HOST_WIDE_INT size)
    given dimension.  */
 
 static bool
-flexible_array_member_type_p (const_tree type)
+nvptx_flexible_array_member_type_p (const_tree type)
 {
   if (TREE_CODE (type) != RECORD_TYPE)
     return false;
@@ -2520,7 +2520,7 @@ nvptx_assemble_decl_begin (FILE *file, const char *name, const char *section,
   bool atype = (TREE_CODE (type) == ARRAY_TYPE)
     && (TYPE_DOMAIN (type) == NULL_TREE);
 
-  if (undefined && flexible_array_member_type_p (type))
+  if (undefined && nvptx_flexible_array_member_type_p (type))
     {
       size = 0;
       atype = true;