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I am working under Ubuntu 11.04 and now engaged in a project whose source code uses routines like "sqrtf" or "lgamma", which are complained by my IDE, claiming that they cannot be found in "math.h". A senior member told me I need POSIX.1-2001. I used ldd --version to check my glibc's version and it gave ldd (Ubuntu EGLIBC 2.13-0ubuntu13) 2.13. I guessed the embedded version of glibc is simplified so I decided to make it upgraded to the full glibc-2.14. But after some search in aptitude I found that I have to do a manual installation. Getting frustrated all the way, I realize maybe the God is warning me off the wrong path. So...can anyone give some hints for me? Thank you~

Ziyuan
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2 Answers2

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Is the linker called with argument -lm?

David
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    My tentative program as above runs normally after compiled, ignoring Eclipse's complaint, so it may be a bug of Eclipse CDT. – Ziyuan Aug 01 '11 at 09:11
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As the comment pointed out, it was a bug of CDT.

Ziyuan
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  • would you care to link to the bug report and/or resolution? I have the same problem. – Christoph Mar 19 '12 at 16:10
  • Yes... Please... what's the solution, I have the same problem. – krico Mar 23 '12 at 09:06
  • @krico: Check your indexer settings. See this answer for details: http://stackoverflow.com/questions/10095295/why-cant-codan-find-size-t/10095683#10095683 – HighCommander4 Apr 10 '12 at 21:25
  • can you tell exactly what you did? I have my settings as recommended in that answer, but still float math functions (atanf for example) are not recognized...:-( – Christoph Apr 19 '12 at 20:17
  • To above users and @Christoph: as I recall, I didn't do anything for it and simply switched to another IDE because I thought it was a bug of CDT which was beyond my reach. – Ziyuan Jun 02 '13 at 21:49