can't pass the compile

[haichaoji1234]

when try to compile the 4.2 example, it report error：
#14 44.55 CC libcurl_la-easy.lo
#14 44.63 In file included from easy.c:87:
#14 44.63 easy_lock.h: In function 'curl_simple_lock_lock':
#14 44.63 easy_lock.h:54:7: error: implicit declaration of function 'sched_yield' [-Werror=implicit-function-declaration]
#14 44.63 54 | sched_yield();
#14 44.63 | ^~~~~~~~~~~
#14 44.77 cc1: some warnings being treated as errors
#14 44.77 make[2]: *** [Makefile:2218: libcurl_la-easy.lo] Error 1
#14 44.77 make[2]: Leaving directory '/opt/build/curl/lib'
#14 44.77 make[1]: *** [Makefile:1355: all] Error 2
#14 44.77 make[1]: Leaving directory '/opt/build/curl/lib'
#14 44.77 make: *** [Makefile:1229: all-recursive] Error 1

I remembered that work with 4.0, but the example code keep unchanged. so it seems the curl version has some update, it can't work now.

i also try to upload a local old curl version, and it can pass compile

[haichaoji1234]

this also happens to acap3 example, so it seems curl new version involve this error.

[pataxis]

@haichaoji1234 Thanks for the report, we will have a look at this issue and get back to you.

[pataxis]

@haichaoji1234 We have replaced the curl_example with openssl_curl_example where the curl version is locked. I hope that example can get you through the issue.