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authorMike Frysinger <vapier@gentoo.org>2005-08-25 23:07:24 +0000
committerMike Frysinger <vapier@gentoo.org>2005-08-25 23:07:24 +0000
commitaceb53ffab14d5333c7c2ac56d0a58473b2636e7 (patch)
tree10bf63bf2b36043e8a962b5eff3c81abbc182b06
parent6f92ac370bb1140f2e8f7652fa9cf6bb70a3e40f (diff)
add a note explaining the weird h_errno definition
-rw-r--r--include/netdb.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/netdb.h b/include/netdb.h
index 3023ba04f..9ed963d87 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -54,7 +54,9 @@
__BEGIN_DECLS
/* Error status for non-reentrant lookup functions.
- We use a macro to access always the thread-specific `h_errno' variable. */
+ We use a macro to access always the thread-specific `h_errno' variable.
+ We always need the extern int here in case internal libc code undefines
+ the macro because it needs access to the underlying storage. */
extern int h_errno;
#if defined(__UCLIBC_HAS_THREADS__)
# define h_errno (*__h_errno_location ())