################################################################################ # # toolchain # ################################################################################ ifeq ($(BR2_TOOLCHAIN_BUILDROOT),y) TOOLCHAIN_DEPENDENCIES += toolchain-buildroot else ifeq ($(BR2_TOOLCHAIN_EXTERNAL),y) TOOLCHAIN_DEPENDENCIES += toolchain-external endif TOOLCHAIN_ADD_TOOLCHAIN_DEPENDENCY = NO TOOLCHAIN_INSTALL_STAGING = YES # Apply a hack that Rick Felker suggested[1] to avoid conflicts between libc # headers and kernel headers. This is needed for kernel headers older than # 4.15. Kernel headers 4.15 and newer don't require __GLIBC__ to be defined. # # Augment the original suggestion with __USE_MISC since recent kernels # (older than 4.15) 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. # # Kernel version 3.12 introduced the libc-compat.h header. # # [1] http://www.openwall.com/lists/musl/2015/10/08/2 ifeq ($(BR2_TOOLCHAIN_USES_MUSL)$(BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12):$(BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15),yy:) 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/' \ $(STAGING_DIR)/usr/include/linux/libc-compat.h endef TOOLCHAIN_POST_INSTALL_STAGING_HOOKS += TOOLCHAIN_MUSL_KERNEL_HEADERS_COMPATIBILITY_HACK endif # Install default nsswitch.conf file if the skeleton doesn't provide it ifeq ($(BR2_TOOLCHAIN_USES_GLIBC),y) define GLIBC_COPY_NSSWITCH_FILE @if [ ! -f "$(TARGET_DIR)/etc/nsswitch.conf" ]; then \ $(INSTALL) -D -m 0644 package/glibc/nsswitch.conf $(TARGET_DIR)/etc/nsswitch.conf ; \ fi endef TOOLCHAIN_POST_INSTALL_TARGET_HOOKS += GLIBC_COPY_NSSWITCH_FILE endif $(eval $(virtual-package))