(libexif) - ERROR: Failed to build gem native extension.

M

mela

hey y'all

I'm setting up a ruby project here and when running a `bundle install` I fail when building `exif 1.0.1`

I went and got libexif but during compile it fails it's checks. I'm wondering how I can go about debugging this situation? Seems that maybe ruby isn't able to find the `libexif/exif-data.h` headers and if that's the case maybe it's a simple fix of symlinking them to where it's searching. Some output from my shell:

Code: 
current directory: /usr/home/melanie/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/exif-1.0.1/ext/exif
make "DESTDIR="
compiling exif.c
In file included from exif.c:2:
./data.h:4:10: fatal error: 'libexif/exif-data.h' file not found
#include <libexif/exif-data.h>
         ^~~~~~~~~~~~~~~~~~~~~
1 error generated.
*** Error code 1

When I look at the `mkmf.log` I catch this line here: `/usr/bin/ld: cannot find -lexif`

Any thoughts on where I can maybe pick this up? Thanks everyone!
 
hey SirDice, thanks a ton for the reply

My project is currently using this gem: https://github.com/tonytonyjan/exif

Granted when I replaced this gem with exifr (at your suggestion) I was able to get things to run and all seems right in the world. I'll talk with my project mates and see if we can move to this gem but if we can't I'll need to get the above gem working (for reference SirDice recommended this gem https://github.com/remvee/exifr)

I actually managed to get exif 1.0.1 to compile yesterday using $ CPATH=/usr/local/include gem install exif -v '1.0.1' which got libexif/exif-data.h in scope

BUT! When trying to start rails I hit a new error:

exif-1.0.1/lib/exif/exif.so: Undefined symbol "exif_data_free"

At first I thought this may be an issue with the exif version, so I upgraded exif to 2.2.0 and used the above method with CPATH but still hit this error: Undefined symbol "exif_data_free"

I'm almost positive this has to do with something being weird during my compile because looking at the C code for libexif and exif I don't see why I'd hit this error...

https://github.com/tonytonyjan/exif...4d577bb43d17366cd1eb1c1c/ext/exif/data.c#L214

https://github.com/libexif/libexif/...c77eb28fe272d9a5b665/libexif/exif-data.c#L127

Any ideas? Thanks again SirDance!
 
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