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I'm using Linux OS (Ubuntu) and I need some recording file from mic. I typed sudo apt-get install libasound2-dev. Then, I can find header file in /usr/include/alsa , but I can't find c file. I think this is the problem of "undefined reference to 'snd_pcm_open'". What can I do?

dlmeetei
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daewon Kim
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  • apt-get install on a dev package installs binaries and headers, not the C code. You will need source code separately – dlmeetei Aug 18 '17 at 08:41
  • Possible duplicate of [gcc: undefined reference to](https://stackoverflow.com/questions/22426574/gcc-undefined-reference-to) – CL. Aug 18 '17 at 09:02
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    You have to link to the alsa library on the command line, I think it is `-lasound` – tay10r Aug 19 '17 at 22:40
  • Yes, "undefined reference" almost always refers to a compiled subroutine, it could even be in the same program, not a piece of source code. Probably a library, maybe another program you compile at the same time. The /opt/vc stuff on a Raspberrry Pi and rtlsdr are infamous for this, your makefile needs to compile several programs besides what you're working on at the same time. – Alan Corey Aug 24 '20 at 23:45

1 Answers1

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I you want the source code of a libasound2-dev, use the commande

apt-get source libasound2-dev

You might need to install dpkg-dev package.

fraff
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