Libxc is a library which is called by QE.
you don't need to touch the f90 files.
just install Libxc, then build QE using the library.

On 04/03/2015 08:10 AM, plgong wrote:
Dear Eirc,
      Thanks for your quick reply. I found the link you provided, but I do not 
find that libxc would surport
  QE. However, I see libxc.f90 in QE5.1.2/Modules/libxc.f90. Do you know how to 
link the libxc to QE?
  Please help me at a time most convenient to you.

  Best wishes
P. L. Gong

  Addr: Institute of Solid State Physics, Chinese Academy of
  Sciences, Hefei, Anhui 230031, China


-----原始邮件-----
发件人:"Éric Germaneau" <[email protected]>
发送时间:2015年4月3日 星期五
收件人:"PWSCF Forum" <[email protected]>
抄送:
主题:Re: [Pw_forum] libxc with QE

Gong,

As the message clearly says you need Libxc to be installed.
If you had googled it you would have found the following link:

http://www.tddft.org/programs/octopus/wiki/index.php/Libxc
Éric.

On 04/02/2015 07:32 PM, plgong wrote:

Dear professor,
    Recenetly, I found that tb09 (meta-GGA) can ue used in the version of QE 
5.1.2, but when I run an
example, it reported that,
"    Error in routine tb09 (1):
      need libxc
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

      stopping ...

  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
      Error in routine tb09 (1):
      need libxc
"
I have used "input_dft='tb09' in my inputfile.

I have no idea about libxc, Do I need to install it? How can I do?
pPlease help me at a time most convenient to you.

Best wishes

P. L. Gong

Addr: Institute of Solid State Physics, Chinese Academy of
Sciences, Hefei, Anhui 230031, China


--

====================================================
Addr: Institute of Solid State Physics, Chinese Academy of
Sciences, Hefei, Anhui 230031, China
Tel: +86-551-65591591(office), 18756086113(cell phone)
Email: [email protected]
========================================================================





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--
Éric Germaneau (艾海克), Specialist
Center for High Performance Computing
Shanghai Jiao Tong University
Room 205 Network Center, 800 Dongchuan Road, Shanghai 200240 China
M:[email protected]:+86-136-4161-6480 W:http://hpc.sjtu.edu.cn
--

====================================================
Addr: Institute of Solid State Physics, Chinese Academy of
Sciences, Hefei, Anhui 230031, China
Tel: +86-551-65591591(office), 18756086113(cell phone)
Email: [email protected]
========================================================================





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[email protected]
http://pwscf.org/mailman/listinfo/pw_forum

--
Éric Germaneau (艾海克), Specialist
Center for High Performance Computing
Shanghai Jiao Tong University
Room 205 Network Center, 800 Dongchuan Road, Shanghai 200240 China
M:[email protected] P:+86-136-4161-6480 W:http://hpc.sjtu.edu.cn
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