1 ################################################################################
5 ################################################################################
7 ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y)
8 TOOLCHAIN_DEPENDENCIES += toolchain-buildroot
9 else ifeq ($(BR2_TOOLCHAIN_EXTERNAL),y)
10 TOOLCHAIN_DEPENDENCIES += toolchain-external
13 TOOLCHAIN_ADD_TOOLCHAIN_DEPENDENCY = NO
15 # Apply a hack that Rick Felker suggested[1] to avoid conflicts between libc
16 # headers and kernel headers. This is needed for kernel headers older than
17 # 4.15. Kernel headers 4.15 and newer don't require __GLIBC__ to be defined.
19 # Augment the original suggestion with __USE_MISC since recent kernels
20 # (older than 4.15) require this glibc internal macro. Also, as musl defines
21 # IFF_LOWER_UP, IFF_DORMANT and IFF_ECHO, add another macro to suppress
22 # them in the kernel header, and avoid macro/enum conflict.
24 # Kernel version 3.12 introduced the libc-compat.h header.
26 # [1] http://www.openwall.com/lists/musl/2015/10/08/2
27 ifeq ($(BR2_TOOLCHAIN_USES_MUSL)$(BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12):$(BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15),yy:)
28 define TOOLCHAIN_MUSL_KERNEL_HEADERS_COMPATIBILITY_HACK
29 $(SED) 's/^#if defined(__GLIBC__)$$/#if 1/' \
30 $(STAGING_DIR)/usr/include/linux/libc-compat.h
31 $(SED) '1s/^/#define __USE_MISC\n/' \
32 $(STAGING_DIR)/usr/include/linux/libc-compat.h
33 $(SED) '1s/^/#define __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO 0\n/' \
34 $(STAGING_DIR)/usr/include/linux/libc-compat.h
36 TOOLCHAIN_POST_INSTALL_STAGING_HOOKS += TOOLCHAIN_MUSL_KERNEL_HEADERS_COMPATIBILITY_HACK
37 TOOLCHAIN_INSTALL_STAGING = YES
40 $(eval $(virtual-package))