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package/libunwind: add libucontext support

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We can expand the list of supported musl architectures by
letting libucontext provide required context API's.

Use the following table to determine which architectures require
libucontext for BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED:
https://github.com/libunwind/libunwind/tree/v1.6.2#libc-requirements

Enable BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS if we have
BR2_PACKAGE_LIBUCONTEXT_ARCH_SUPPORTS or if context is not required
by checking for !BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED.

Select BR2_PACKAGE_LIBUCONTEXT when selecting BR2_PACKAGE_LIBUNWIND
if we have BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
This commit is contained in:
James Hilliard 2022-08-11 00:35:02 -06:00 committed by Arnout Vandecappelle
parent 3a6e9d2f3f
commit 6ea2a27f90
2 changed files with 22 additions and 1 deletions
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19
package/libunwind/Config.in
View File

@ -1,3 +1,17 @@
config BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED
bool
default y
depends on !BR2_ARM_CPU_HAS_ARM
depends on !BR2_aarch64
depends on !BR2_aarch64_be
depends on !BR2_mips
depends on !BR2_mipsel
depends on !BR2_mips64
depends on !BR2_mips64el
depends on !BR2_riscv
depends on !BR2_x86_64
depends on BR2_TOOLCHAIN_USES_MUSL
# 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).
@ -17,7 +31,8 @@ config BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS
(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)
(!BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED || \
BR2_PACKAGE_LIBUCONTEXT_ARCH_SUPPORTS)
config BR2_PACKAGE_LIBUNWIND
bool "libunwind"
@ -27,6 +42,8 @@ config BR2_PACKAGE_LIBUNWIND
# forcefully links against libgcc_s, only available in dynamic
# linking configurations
depends on !BR2_STATIC_LIBS
select BR2_PACKAGE_LIBUCONTEXT if BR2_TOOLCHAIN_USES_MUSL && \
BR2_PACKAGE_LIBUNWIND_MUSL_CONTEXT_REQUIRED
help
C API to determine the call-chain of a program.

4
package/libunwind/libunwind.mk
View File

@ -16,4 +16,8 @@ LIBUNWIND_CONF_OPTS = \
--disable-tests \
$(if $(BR2_INSTALL_LIBSTDCPP),--enable-cxx-exceptions,--disable-cxx-exceptions)
ifeq ($(BR2_PACKAGE_LIBUCONTEXT),y)
LIBUNWIND_DEPENDENCIES += libucontext
endif
$(eval $(autotools-package))