From 7b9bbf77c9341c43bd0111e0dcdfefc2e786fcb6 Mon Sep 17 00:00:00 2001 From: Yann Collet Date: Tue, 26 Jun 2018 14:08:35 -0700 Subject: [PATCH] switched to a sizeof() version avoid -Werror=unused-variable issue --- lib/common/debug.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/common/debug.h b/lib/common/debug.h index 9b5878cfc..0c04ad2cc 100644 --- a/lib/common/debug.h +++ b/lib/common/debug.h @@ -58,8 +58,9 @@ extern "C" { /* static assert is triggered at compile time, leaving no runtime artefact, - * but can only work with compile-time constants */ -#define DEBUG_STATIC_ASSERT(c) { extern char DEBUG_static_assert[(c) ? 1 : -1]; } + * but can only work with compile-time constants. + * This variant can only be used inside a function. */ +#define DEBUG_STATIC_ASSERT(c) (void)sizeof(char[(c) ? 1 : -1]) /* DEBUGLEVEL is expected to be defined externally, -- 2.47.2