Does not build on alpine linux (qsort_r missing)

[perlpunk]

I'm trying to build libfyaml 0.2 on alpine linux 3.10. It seems they are not using glibc, so qsort_r is missing:

lib/fy-doc.c: In function 'fy_node_mapping_perform_sort':
lib/fy-doc.c:3608:2: warning: implicit declaration of function 'qsort_r'; did you mean 'qsort'? [-Wimplicit-function-declaration]                                                                                                        
  qsort_r(fynpp, count, sizeof(*fynpp), fy_node_mapping_sort_cmp, &ctx);
  ^~~~~~~
  qsort
  CC    lib/fy-emit.o
  CC    lib/fy-utils.o
  LINK  libfyaml-0.2.la
ar: `u' modifier ignored since `D' is the default (see `U')
  CC    tool/fy_tool-fy-tool.o
  LINK  fy-tool
/usr/lib/gcc/x86_64-alpine-linux-musl/8.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: ./.libs/libfyaml-0.2.so: undefined reference to `qsort_r'                                                                                       
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:641: fy-tool] Error 1
make[1]: *** [Makefile:575: all-recursive] Error 1
make: *** [Makefile:474: all] Error 2

[pantoniou]

fixed by fee9f179fc2553f18d805a28b8a924c569c0bcb5

[oxr463]

@perlpunk did you by any chance create an APKBUILD for this?

[perlpunk]

@oxr463 no, I am using it to create docker images for various YAML processors here: https://github.com/yaml/yaml-runtimes

[oxr463]

See: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/7924