From 31a07ea881f1f982ca90808461493fdea1eea798 Mon Sep 17 00:00:00 2001 From: Guy Harris Date: Sat, 2 Jan 2021 17:05:43 -0800 Subject: Pick up redefinition protection from tcpdump. In case _DEFAULT_SOURCE or _BSD_SOURCE have already been defined, don't redefine them, as that will get warnings that may turn into errors. --- ftmacros.h | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'ftmacros.h') diff --git a/ftmacros.h b/ftmacros.h index 3fafab80..3cd75056 100644 --- a/ftmacros.h +++ b/ftmacros.h @@ -105,9 +105,18 @@ * don't whine about _BSD_SOURCE being deprecated; we still have * to define _BSD_SOURCE to handle older versions of GNU libc that * don't support _DEFAULT_SOURCE. + * + * But, if it's already defined, don't define it, so that we don't + * get a warning of it being redefined if it's defined as, for + * example, 1. */ - #define _DEFAULT_SOURCE - #define _BSD_SOURCE + #ifndef _DEFAULT_SOURCE + #define _DEFAULT_SOURCE + #endif + /* Avoid redefining _BSD_SOURCE if it's already defined as for ex. 1 */ + #ifndef _BSD_SOURCE + #define _BSD_SOURCE + #endif #endif #endif -- cgit v1.2.3