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Bug #16455

closed

coroutine ucontext uses deprecated POSIX getcontext/swapcontext/makecontext, absent in musl and uclibc

Added by luizluca (Luiz Angelo Daros de Luca) over 4 years ago. Updated 1 day ago.

Status:
Closed
Target version:
ruby -v:
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091)
[ruby-core:96499]

Description

Hello,

While building ruby 2.7.0 for mips with musl, it fails:

linking miniruby                                                                                   /home/luizluca/prog-local/openwrt/trunk/staging_dir/toolchain-mips_24kc_gcc-8.3.0_musl/lib/gcc/mips-openwrt-linux-musl/8.3.0/../../../../mips-openwrt-linux-musl/bin/ld: cont.o: in function `coroutine_initialize_main':                                                                                cont.c:(.text+0x36c): undefined reference to `getcontext'                                          /home/luizluca/prog-local/openwrt/trunk/staging_dir/toolchain-mips_24kc_gcc-8.3.0_musl/lib/gcc/mips-openwrt-linux-musl/8.3.0/../../../../mips-openwrt-linux-musl/bin/ld: cont.o: in function `fiber_setcontext':                                                                                         cont.c:(.text+0xde6): undefined reference to `swapcontext'                                         /home/luizluca/prog-local/openwrt/trunk/staging_dir/toolchain-mips_24kc_gcc-8.3.0_musl/lib/gcc/mips-openwrt-linux-musl/8.3.0/../../../../mips-openwrt-linux-musl/bin/ld: cont.o: in function `fiber_switch':                                                                                             cont.c:(.text+0x16b8): undefined reference to `makecontext'                                        collect2: error: ld returned 1 exit status                                                         make[3]: *** [Makefile:271: miniruby] Error 1

It seems that now ruby either uses native ASM code or ucontext for coroutine.
Both are unavailable in my crossbuild. It was building and running with 2.6.x:

configure:25935: checking native coroutine implementation for mips-linux-gnu                       configure:25976: result: no

With 2.7.0:

configure:26536: checking native coroutine implementation for mips-linux-gnu                       configure:26601: result: ucontext

I tried to disable it with --without-coroutine, --with-out-coroutine and --with-coroutine=no, but it is innocuous or try to use a "no" implementation.

It looks like this introduced the change https://github.com/ruby/ruby/commit/7291fef55c90b9ab6b3c22018b16972861b98c9d

And musl might never fix it:
https://wiki.musl-libc.org/open-issues.html


Files

aarch64_be.patch (480 Bytes) aarch64_be.patch puchuu (Andrew Aladjev), 10/01/2020 10:19 PM
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