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Re: ***UNCHECKED*** How to autotools figure what library need to be link
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From: |
Simon Richter |
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Subject: |
Re: ***UNCHECKED*** How to autotools figure what library need to be linked to? |
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Date: |
Mon, 29 Mar 2021 17:01:26 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 |
Hi,
On 29.03.21 16:20, Peng Yu wrote:
> crypt(3) does not need -lcrypt on macOS, but need -lcrypt on Linux.
> How does autotools determine what library is need to be linked based
> on the source code? Thanks.
It compiles a short test program that calls crypt, then tries to link it
without any extra libraries, and if that fails, retries with -lcrypt.
It does not look at the source code of the project at all, the
configure.ac just includes a reference to the test to be run, and a copy
of the test is included in the configure script.
Simon
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