Explicitly add -lpthread when building curl
#24261
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This is necessary on older Linuces (such as Ubuntu 12.04 x86) that have older OpenSSL library versions. Curl switched over to a threaded DNS resolver by default in version 7.55, and this requires `libpthread`. However, their build system relies on the fact that OpenSSL (usually) provides the proper linkage flags, and so breaks on older Linuces. See [0] for more details. [0] https://curl.haxx.se/mail/lib-2017-09/0112.html
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This is necessary on older Linuces (such as Ubuntu 12.04 x86) that have older OpenSSL library versions. Curl switched over to a threaded DNS resolver by default in version 7.55, and this requires `libpthread`. However, their build system relies on the fact that OpenSSL (usually) provides the proper linkage flags, and so breaks on older Linuces. See [0] for more details. [0] https://curl.haxx.se/mail/lib-2017-09/0112.html (cherry picked from commit c323437, PR #24261)
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This is necessary on older Linuces (such as Ubuntu 12.04 x86) that have
older OpenSSL library versions. Curl switched over to a threaded DNS
resolver by default in version 7.55, and this requires
libpthread.However, their build system relies on the fact that OpenSSL (usually)
provides the proper linkage flags, and so breaks on older Linuces. See
[0] for more details.
[0] https://curl.haxx.se/mail/lib-2017-09/0112.html