[OpenFOAM.org] Flex problem when building OpenFOam 3.0.x

bastil · December 20, 2015, 09:18

Hello,

I have loaded the latest OpenFOAM 3.0.x and I try to install it using system openmpi (1.10), system gcc (4.9.3) and system flex (2.6.0) on Gentoo x86_64.

When building the applications I ran in flex issues which I thought where resolved years ago:

Code:

undefined reference to `yyFlexLexer::yywrap()

This happens for many apps like ansysToFoam and prevents lots of applications to be build afterwards. I tried an older flex out of the 2.5.x-series as well but I get the same issue. I don't know how to fix this issue.

wyldckat · December 20, 2015, 18:20

Quick answer: See the posts from this thread, as the same issue occurs on ArchLinux and the 2 part solution is given there in 2 posts of mine: http://www.cfd-online.com/Forums/ope...archlinux.html

bastil · December 23, 2015, 05:39

Thanks. Downgrading flex followed by a complete rebuild solved the issue.

December 20, 2015, 09:18	Flex problem when building OpenFOam 3.0.x	#1
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	Hello, I have loaded the latest OpenFOAM 3.0.x and I try to install it using system openmpi (1.10), system gcc (4.9.3) and system flex (2.6.0) on Gentoo x86_64. When building the applications I ran in flex issues which I thought where resolved years ago: Code: undefined reference to `yyFlexLexer::yywrap() This happens for many apps like ansysToFoam and prevents lots of applications to be build afterwards. I tried an older flex out of the 2.5.x-series as well but I get the same issue. I don't know how to fix this issue.

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December 20, 2015, 18:20		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Quick answer: See the posts from this thread, as the same issue occurs on ArchLinux and the 2 part solution is given there in 2 posts of mine: http://www.cfd-online.com/Forums/ope...archlinux.html

December 23, 2015, 05:39		#3
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	Thanks. Downgrading flex followed by a complete rebuild solved the issue.