Homebrew cannot link libpng trying to install gdal

Question

I'm trying to install gdal via homebrew so I can start working with topojson, but I keep getting this error and I'm not sure how to resolve it?

k-6177:Cellar k$ brew install gdal
==> Installing dependencies for gdal: libpng, giflib, libtiff, lzlib, proj, libgeotiff, geos, sqlite, freexl, libxml2, json-c, liblwgeom, libspatialite
Error: Cannot link libpng
Another version is already linked: /usr/local/Cellar/libpng/1.6.16

Have you tried `brew remove libpng` then `brew install gdal`? — Mark Setchell, Aug 25 '15 at 19:07

score 28 · Accepted Answer · answered Aug 30 '15 at 15:02

28

Looks like I just needed to change some permissions. I used the following command:

sudo chown -R $(whoami):admin /usr/local

answered Aug 30 '15 at 15:02

moku

4,099
5
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Should I undo this after the installation is complete? It seems a bit dangerous to change the ownership of /user/local like this. – Konstantin Schubert Sep 03 '16 at 11:04

score 4 · Answer 2 · answered Jun 26 '18 at 14:54

4

I did brew unlink libpng (or any other "already linked" package).

answered Jun 26 '18 at 14:54

Zhiwei

43
4

Homebrew cannot link libpng trying to install gdal

2 Answers2