From: yxj-github-437 <2457369...@qq.com>
This patch attempts to fix an error when build module std. The reason for the
error is __builrin_va_list (aka struct __va_list) is an internal linkage. so
attempt to handle this builtin type by identifying whether DECL_SOURCE_LOCATION
(entity)
is BUILTINS_LOCATION.
/x/gcc-15.0.0/usr/bin/aarch64-linux-android-g++ -fmodules -std=c++23 -fPIC -O2
-fsearch-include-path bits/std.cc -c
/x/gcc-15.0.0/usr/lib/gcc/aarch64-linux-android/15.0.0/include/c++/bits/std.cc:3642:14:
error: exporting ‘typedef __gnuc_va_list va_list’ that does not have external
linkage
3642 | using std::va_list;
| ^~~~~~~
<built-in>: note: ‘struct __va_list’ declared here with internal linkage
gcc:
* cp/name-lookup.cc (check_can_export_using_decl): add identifying
whether
DECL_SOURCE_LOCATION (entity) is BUILTINS_LOCATION.
---
gcc/cp/name-lookup.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/cp/name-lookup.cc b/gcc/cp/name-lookup.cc
index 0e185d3ef42..73f3034adb4 100644
--- a/gcc/cp/name-lookup.cc
+++ b/gcc/cp/name-lookup.cc
@@ -5225,7 +5225,7 @@ check_can_export_using_decl (tree binding)
if (TREE_CODE (entity) == TYPE_DECL)
{
entity = TYPE_MAIN_DECL (TREE_TYPE (entity));
- if (!entity)
+ if (!entity || DECL_SOURCE_LOCATION (entity) == BUILTINS_LOCATION)
return true;
}
--
2.43.0
