# libunwind is only available for a certain subset of the # architectures (as visible in the list of architectures supported # with the glibc C library below). # # In addition to this, on some architectures libunwind requires the # *context() function from the C library, which are only available on # certain architectures in uClibc, and not available at all on # musl. But on some other architectures, libunwind works without using # the *context() functions, which allows it to be built with musl. config BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS bool default y if BR2_TOOLCHAIN_USES_GLIBC && \ (BR2_ARM_CPU_HAS_ARM || BR2_aarch64 || BR2_mips || BR2_mipsel || \ BR2_mips64 || BR2_mips64el || BR2_powerpc || BR2_sh || \ BR2_i386 || BR2_x86_64) default y if BR2_TOOLCHAIN_USES_UCLIBC && \ (BR2_ARM_CPU_HAS_ARM || BR2_mips || BR2_mipsel || \ BR2_mips64 || BR2_mips64el || BR2_x86_64) default y if BR2_TOOLCHAIN_USES_MUSL && \ (BR2_ARM_CPU_HAS_ARM || BR2_aarch64 || BR2_x86_64) config BR2_PACKAGE_LIBUNWIND bool "libunwind" depends on BR2_TOOLCHAIN_HAS_THREADS depends on BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS # forcefully links against libgcc_s, only available in dynamic # linking configurations depends on !BR2_STATIC_LIBS help C API to determine the call-chain of a program. http://www.nongnu.org/libunwind/index.html comment "libunwind needs a toolchain w/ threads, dynamic library" depends on BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS