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* [gcc r13-4875] libstdc++: Fix Darwin bootstrap error in src/c++20/tzdb.cc
@ 2022-12-23 13:46 Jonathan Wakely
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From: Jonathan Wakely @ 2022-12-23 13:46 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:b358521b608f36409281a51263ace3155d28f54d
commit r13-4875-gb358521b608f36409281a51263ace3155d28f54d
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Fri Dec 23 13:43:52 2022 +0000
libstdc++: Fix Darwin bootstrap error in src/c++20/tzdb.cc
Mach-O requires weak symbols to have a definition, so add a default
implementation of __gnu_cxx::zoneinfo_dir_override.
libstdc++-v3/ChangeLog:
* src/c++20/tzdb.cc [__APPLE__] (zoneinfo_dir_override): Add
definition.
Diff:
---
libstdc++-v3/src/c++20/tzdb.cc | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc
index a02bcd4aec7..5f5c4199f65 100644
--- a/libstdc++-v3/src/c++20/tzdb.cc
+++ b/libstdc++-v3/src/c++20/tzdb.cc
@@ -52,6 +52,10 @@
# endif
#endif
+#ifndef _GLIBCXX_ZONEINFO_DIR
+# define _GLIBCXX_ZONEINFO_DIR "/usr/share/zoneinfo"
+#endif
+
namespace __gnu_cxx
{
#ifdef _AIX
@@ -59,6 +63,12 @@ namespace __gnu_cxx
const char* (*zoneinfo_dir_override)() = nullptr;
#else
[[gnu::weak]] const char* zoneinfo_dir_override();
+
+#ifdef __APPLE__
+ // Need a weak definition for Mach-O.
+ [[gnu::weak]] const char* zoneinfo_dir_override()
+ { return _GLIBCXX_ZONEINFO_DIR; }
+#endif
#endif
}
@@ -934,9 +944,6 @@ namespace std::chrono
return info;
}
-#ifndef _GLIBCXX_ZONEINFO_DIR
-# define _GLIBCXX_ZONEINFO_DIR "/usr/share/zoneinfo"
-#endif
namespace
{
string
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