Without stdint.h type uint8_t cannot be used. And without endian.h macros __BYTE_ORDER, __LITTLE_ENDIAN and __BIG_ENDIAN are not defined. When both __BYTE_ORDER and __LITTLE_ENDIAN macros are not defined, then condition #if __BYTE_ORDER == __LITTLE_ENDIAN is true. --- profiles/audio/a2dp-codecs.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/profiles/audio/a2dp-codecs.h b/profiles/audio/a2dp-codecs.h index 43a5eef97..327901eac 100644 --- a/profiles/audio/a2dp-codecs.h +++ b/profiles/audio/a2dp-codecs.h @@ -22,6 +22,9 @@ * */ +#include <endian.h> +#include <stdint.h> + #define A2DP_CODEC_SBC 0x00 #define A2DP_CODEC_MPEG12 0x01 #define A2DP_CODEC_MPEG24 0x02 @@ -213,7 +216,7 @@ typedef struct { .codec_id1 = (((c) >> 8) & 0xff), \ }) -#if __BYTE_ORDER == __LITTLE_ENDIAN +#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN typedef struct { uint8_t channel_mode:4; @@ -260,7 +263,7 @@ typedef struct { uint8_t unknown[2]; } __attribute__ ((packed)) a2dp_ldac_t; -#elif __BYTE_ORDER == __BIG_ENDIAN +#elif defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN typedef struct { uint8_t frequency:4; -- 2.11.0