From: Baruch Siach Date: Thu, 15 Dec 2016 19:48:20 +0000 (+0200) Subject: toolchain: extend musl workaround for recent kernels X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4470dd9b1bdbb9b39e9fb13f27bcaa044719de6d;p=buildroot.git toolchain: extend musl workaround for recent kernels Kernels v4.7 and newer[1] require the __USE_MISC macro for libc-compat.h suppressions to be effective. musl does not define this macros, so add an unconditional definition of __USE_MISC to libc-compat.h. In addition, since musl define IFF_LOWER_UP and friends as macros (instead of enums), define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO to suppress the kernel corresponding definitions to avoid conflict. Fixes (xl2tp): http://autobuild.buildroot.net/results/0b9/0b9384c4beaac85f3a17c3245c8a7418c2e2e296/ http://autobuild.buildroot.net/results/657/657bc5687cf01aee38d32d45ba57fb62b2bd56d0/ http://autobuild.buildroot.net/results/bcd/bcd81618de2f745a19c923c66d787b5182bb54aa/ [1] Since commit f0a3fdca79 (uapi glibc compat: fix compilation when !__USE_MISC in glibc) Signed-off-by: Baruch Siach Signed-off-by: Thomas Petazzoni --- diff --git a/toolchain/toolchain/toolchain.mk b/toolchain/toolchain/toolchain.mk index d317e917d0..b16db01501 100644 --- a/toolchain/toolchain/toolchain.mk +++ b/toolchain/toolchain/toolchain.mk @@ -16,11 +16,20 @@ TOOLCHAIN_ADD_TOOLCHAIN_DEPENDENCY = NO # headers and kernel headers. This is a temporary measure until musl finds a # better solution. # +# Augment the original suggestion with __USE_MISC since recent kernels +# require this glibc internal macro. Also, as musl defines IFF_LOWER_UP, +# IFF_DORMANT and IFF_ECHO, add another macro to suppress them in the +# kernel header, and avoid macro/enum conflict. +# # [1] http://www.openwall.com/lists/musl/2015/10/08/2 ifeq ($(BR2_TOOLCHAIN_USES_MUSL),y) define TOOLCHAIN_MUSL_KERNEL_HEADERS_COMPATIBILITY_HACK $(SED) 's/^#if defined(__GLIBC__)$$/#if 1/' \ $(STAGING_DIR)/usr/include/linux/libc-compat.h + $(SED) '1s/^/#define __USE_MISC\n/' \ + $(STAGING_DIR)/usr/include/linux/libc-compat.h + $(SED) '1s/^/#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0\n/' \ + $(STAGING_DIR)/usr/include/linux/libc-compat.h endef TOOLCHAIN_POST_INSTALL_STAGING_HOOKS += TOOLCHAIN_MUSL_KERNEL_HEADERS_COMPATIBILITY_HACK TOOLCHAIN_INSTALL_STAGING = YES