From cf27184d00c1588eccac71a3bc89c9798e60bbd9 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sun, 30 Aug 2020 21:30:37 -0400 Subject: restore h_errno ABI compatibility with ancient binaries prior to commit e68c51ac46a9f273927aef8dcebc89912ab19ece, h_errno was actually an external data object not a macro. bring back the symbol, and use it as the storage for the main thread's h_errno. technically this still doesn't provide full compatibility if the application was multithreaded, but at the time there were no res_* functions (and they did not set h_errno anyway), so any use of h_errno would have been via thread-unsafe functions. thus a solution that just fixes single-threaded applications seems acceptable. --- src/network/h_errno.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'src/network/h_errno.c') diff --git a/src/network/h_errno.c b/src/network/h_errno.c index 8677a92b..638f7718 100644 --- a/src/network/h_errno.c +++ b/src/network/h_errno.c @@ -1,7 +1,11 @@ #include #include "pthread_impl.h" +#undef h_errno +int h_errno; + int *__h_errno_location(void) { + if (!__pthread_self()->stack) return &h_errno; return &__pthread_self()->h_errno_val; } -- cgit v1.2.1