# proj.4 6.1.0 compatibility?

**URL:** https://discourse.vtk.org/t/proj-4-6-1-0-compatibility/397
**Category:** Development
**Created:** [March 4, 2019, 6:26pm UTC](https://discourse.vtk.org/t/proj-4-6-1-0-compatibility/397 "2019-03-04T18:26:37Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![jiapei100](https://discourse.vtk.org/user_avatar/discourse.vtk.org/jiapei100/32/157_2.png) [@jiapei100](https://discourse.vtk.org/u/jiapei100)
#### Post date: [March 4, 2019, 6:26pm UTC](https://discourse.vtk.org/t/proj-4-6-1-0-compatibility/397/1 "2019-03-04T18:26:37Z")

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I’m trying to build VTK git of the day Mar. 4, 2019. It looks to me there is a small bug in file pj\_errno.c?

> ```
> ....../VTK/ThirdParty/libproj/vtklibproj/src/pj_errno.c:5:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘ __attribute__ ’ before ‘int’
> C_NAMESPACE_VAR int pj_errno = 0;
> ^~~
> ....../VTK/ThirdParty/libproj/vtklibproj/src/pj_errno.c: In function ‘pj_get_errno_ref’:
> ....../VTK/ThirdParty/libproj/vtklibproj/src/pj_errno.c:14:13: error: ‘pj_errno’ undeclared (first use in this function); did you mean ‘proj_errno’?
> return &pj_errno;
> ^ ~~~~~~~
> proj_errno
> 
> ```

Any suggestions?  
Cheers  
Pei

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### Author: ![ben.boeckel](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)
#### Post date: [March 4, 2019, 6:44pm UTC](https://discourse.vtk.org/t/proj-4-6-1-0-compatibility/397/2 "2019-03-04T18:44:18Z")

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What compiler and platform is this?