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In RTP mode modules, that undergo final linking, weak undefined symbols are not a problem. This patch adds kernel-mode VxWorks multilibs to the set of targets that don't support weak undefined symbols without special flags, in which tzdb's zoneinfo_dir_override is given a weak definition. Regstrapped on x86_64-linux-gnu. Also tested with gcc-13 on arm-, aarch64-, x86- and x86_64-vxworks7r2. Ok to install? for libstdc++-v3/ChangeLog * src/c++20/tzdb.cc (__gnu_cxx::zoneinfo_dir_override): Define on VxWorks non-RTP. --- libstdc++-v3/src/c++20/tzdb.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc index 890a4c53e2d44..639d1c440ba16 100644 --- a/libstdc++-v3/src/c++20/tzdb.cc +++ b/libstdc++-v3/src/c++20/tzdb.cc @@ -70,8 +70,9 @@ namespace __gnu_cxx #else [[gnu::weak]] const char* zoneinfo_dir_override(); -#if defined(__APPLE__) || defined(__hpux__) - // Need a weak definition for Mach-O. +#if defined(__APPLE__) || defined(__hpux__) \ + || (defined(__VXWORKS__) && !defined(__RTP__)) + // Need a weak definition for Mach-O et al. [[gnu::weak]] const char* zoneinfo_dir_override() { #ifdef _GLIBCXX_ZONEINFO_DIR -- Alexandre Oliva, happy hacker https://FSFLA.org/blogs/lxo/ Free Software Activist GNU Toolchain Engineer More tolerance and less prejudice are key for inclusion and diversity Excluding neuro-others for not behaving ""normal"" is *not* inclusive