From f972afc2509eebcb00d370256c55b112a3b5ffca Mon Sep 17 00:00:00 2001 From: David Heidelberger <david.heidelberger@ixit.cz> Date: Mon, 29 Jun 2015 16:50:40 +0200 Subject: [PATCH 2/3] uapi/libc-compat.h: do not rely on __GLIBC__ Musl provides the same structs as glibc, but does not provide a define to allow its detection. Since the absence of __GLIBC__ also can mean that it is included from the kernel, change the __GLIBC__ detection to !__KERNEL__, which should always be true when included from userspace. Signed-off-by: John Spencer <maillist-linux@barfooze.de> Tested-by: David Heidelberger <david.heidelberger@ixit.cz> Signed-off-by: Jonas Gorski <jogo@openwrt.org> --- include/uapi/linux/libc-compat.h | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/include/uapi/linux/libc-compat.h +++ b/include/uapi/linux/libc-compat.h @@ -49,13 +49,13 @@ #ifndef _LIBC_COMPAT_H #define _LIBC_COMPAT_H -/* We have included glibc headers... */ -#if defined(__GLIBC__) +/* We have included libc headers... */ +#if !defined(__KERNEL__) -/* Coordinate with glibc net/if.h header. */ -#if defined(_NET_IF_H) && defined(__USE_MISC) +/* Coordinate with libc net/if.h header. */ +#if defined(_NET_IF_H) && (!defined(__GLIBC__) || defined(__USE_MISC)) -/* GLIBC headers included first so don't define anything +/* LIBC headers included first so don't define anything * that would already be defined. */ #define __UAPI_DEF_IF_IFCONF 0 @@ -66,7 +66,11 @@ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS 0 /* For the future if glibc adds IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO */ #ifndef __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO +#ifdef __GLIBC__ #define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 1 +#else +#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0 +#endif #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */ #else /* _NET_IF_H */ @@ -86,10 +90,10 @@ #endif /* _NET_IF_H */ -/* Coordinate with glibc netinet/in.h header. */ +/* Coordinate with libc netinet/in.h header. */ #if defined(_NETINET_IN_H) -/* GLIBC headers included first so don't define anything +/* LIBC headers included first so don't define anything * that would already be defined. */ #define __UAPI_DEF_IN_ADDR 0 #define __UAPI_DEF_IN_IPPROTO 0 @@ -103,7 +107,7 @@ * if the glibc code didn't define them. This guard matches * the guard in glibc/inet/netinet/in.h which defines the * additional in6_addr macros e.g. s6_addr16, and s6_addr32. */ -#if defined(__USE_MISC) || defined (__USE_GNU) +#if !defined(__GLIBC__) || defined(__USE_MISC) || defined (__USE_GNU) #define __UAPI_DEF_IN6_ADDR_ALT 0 #else #define __UAPI_DEF_IN6_ADDR_ALT 1 @@ -118,7 +122,7 @@ #else /* Linux headers included first, and we must define everything - * we need. The expectation is that glibc will check the + * we need. The expectation is that the libc will check the * __UAPI_DEF_* defines and adjust appropriately. */ #define __UAPI_DEF_IN_ADDR 1 #define __UAPI_DEF_IN_IPPROTO 1 @@ -128,7 +132,7 @@ #define __UAPI_DEF_IN_CLASS 1 #define __UAPI_DEF_IN6_ADDR 1 -/* We unconditionally define the in6_addr macros and glibc must +/* We unconditionally define the in6_addr macros and the libc must * coordinate. */ #define __UAPI_DEF_IN6_ADDR_ALT 1 #define __UAPI_DEF_SOCKADDR_IN6 1 @@ -169,7 +173,7 @@ /* If we did not see any headers from any supported C libraries, * or we are being included in the kernel, then define everything * that we need. */ -#else /* !defined(__GLIBC__) */ +#else /* defined(__KERNEL__) */ /* Definitions for if.h */ #define __UAPI_DEF_IF_IFCONF 1 @@ -209,6 +213,6 @@ /* Definitions for xattr.h */ #define __UAPI_DEF_XATTR 1 -#endif /* __GLIBC__ */ +#endif /* __KERNEL__ */ #endif /* _LIBC_COMPAT_H */