From 7c03f4cf46e999af5fafdd31f47004547f9458c0 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 14 Jun 2018 09:47:19 +0800 Subject: [PATCH] Silence lwip_tolower compiler warning Fix gcc build warning: array subscript has type 'char' [-Wchar-subscripts]. Signed-off-by: Axel Lin --- src/include/lwip/arch.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/include/lwip/arch.h b/src/include/lwip/arch.h index b4181610..aa45bee3 100644 --- a/src/include/lwip/arch.h +++ b/src/include/lwip/arch.h @@ -229,7 +229,7 @@ typedef int ssize_t; #define lwip_isxdigit(c) isxdigit((unsigned char)(c)) #define lwip_islower(c) islower((unsigned char)(c)) #define lwip_isspace(c) isspace((unsigned char)(c)) -#define lwip_tolower(c) tolower(c) +#define lwip_tolower(c) tolower((unsigned char)(c)) #endif /** C++ const_cast(val) equivalent to remove constness from a value (GCC -Wcast-qual) */