Hi Monks, I am trying to install a CPAN module but every time I try I get a long result that ends in an error.

When I run:

cpan install Algorithm::Permute

I get...

Reading '/Users/matthewsnyder/.cpan/Metadata'
  Database was generated on Thu, 15 Nov 2018 14:17:03 GMT
Running install for module 'Algorithm::Permute'
Running make for S/SL/SLOYD/Algorithm-Permute-0.16.tar.gz
Checksum for /Users/matthewsnyder/.cpan/sources/authors/id/S/SL/SLOYD/
+Algorithm-Permute-0.16.tar.gz ok

  CPAN.pm: Building S/SL/SLOYD/Algorithm-Permute-0.16.tar.gz

Checking if your kit is complete...
Looks good
Warning: prerequisite Test::LeakTrace 0 not found.
Generating a Unix-style Makefile
Writing Makefile for Algorithm::Permute
Writing MYMETA.yml and MYMETA.json
---- Unsatisfied dependencies detected during ----
----    SLOYD/Algorithm-Permute-0.16.tar.gz   ----
    Test::LeakTrace [build_requires]
Running make test
  Delayed until after prerequisites
Running make install
  Delayed until after prerequisites
Running install for module 'Test::LeakTrace'
Running make for L/LE/LEEJO/Test-LeakTrace-0.16.tar.gz
Checksum for /Users/matthewsnyder/.cpan/sources/authors/id/L/LE/LEEJO/
+Test-LeakTrace-0.16.tar.gz ok

  CPAN.pm: Building L/LE/LEEJO/Test-LeakTrace-0.16.tar.gz

Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Test::LeakTrace
Writing MYMETA.yml and MYMETA.json
cp lib/Test/LeakTrace.pm blib/lib/Test/LeakTrace.pm
cp lib/Test/LeakTrace/JA.pod blib/lib/Test/LeakTrace/JA.pod
cp lib/Test/LeakTrace/Script.pm blib/lib/Test/LeakTrace/Script.pm
Running Mkbootstrap for LeakTrace ()
chmod 644 "LeakTrace.bs"
"/usr/bin/perl" "-Iinc" -MExtUtils::Command::MM -e 'cp_nonempty' -- Le
+akTrace.bs blib/arch/auto/Test/LeakTrace/LeakTrace.bs 644
"/usr/bin/perl" "-Iinc" "/System/Library/Perl/5.18/ExtUtils/xsubpp"  -
+typemap '/System/Library/Perl/5.18/ExtUtils/typemap'  LeakTrace.xs > 
+LeakTrace.xsc
mv LeakTrace.xsc LeakTrace.c
cc -c   -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstac
+k-protector -Os   -DVERSION=\"0.16\" -DXS_VERSION=\"0.16\"  "-I/Syste
+m/Library/Perl/5.18/darwin-thread-multi-2level/CORE"   LeakTrace.c
LeakTrace.xs:2:10: fatal error: 'EXTERN.h' file not found
#include <EXTERN.h>
         ^~~~~~~~~~
1 error generated.
make: *** [LeakTrace.o] Error 1
  LEEJO/Test-LeakTrace-0.16.tar.gz
  /usr/bin/make -- NOT OK
'YAML' not installed, will not store persistent state
Running make test
  Can't test without successful make
Running make install
  Make had returned bad status, install seems impossible
Running make for S/SL/SLOYD/Algorithm-Permute-0.16.tar.gz
  Has already been unwrapped into directory /Users/matthewsnyder/.cpan
+/build/Algorithm-Permute-0.16-bq41zl

  CPAN.pm: Building S/SL/SLOYD/Algorithm-Permute-0.16.tar.gz

Warning: Prerequisite 'Test::LeakTrace => 0' for 'SLOYD/Algorithm-Perm
+ute-0.16.tar.gz' failed when processing 'LEEJO/Test-LeakTrace-0.16.ta
+r.gz' with 'make => NO'. Continuing, but chances to succeed are limit
+ed.
cp lib/Algorithm/Permute.pm blib/lib/Algorithm/Permute.pm
Running Mkbootstrap for Permute ()
chmod 644 "Permute.bs"
"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Permute.bs
+ blib/arch/auto/Algorithm/Permute/Permute.bs 644
cc -c   -g -pipe -fno-common -DPERL_DARWIN -fno-strict-aliasing -fstac
+k-protector -Os   -DVERSION=\"0.16\" -DXS_VERSION=\"0.16\"  "-I/Syste
+m/Library/Perl/5.18/darwin-thread-multi-2level/CORE"  -DPERL_EXT cool
+lex.c
In file included from coollex.c:11:
./coollex.h:13:10: fatal error: 'EXTERN.h' file not found
#include "EXTERN.h"
         ^~~~~~~~~~
1 error generated.
make: *** [coollex.o] Error 1
  SLOYD/Algorithm-Permute-0.16.tar.gz
  /usr/bin/make -- NOT OK
Running make test
  Can't test without successful make
Running make install
  Make had returned bad status, install seems impossible
[download]

I'm pretty experienced with scripting but this sort of stuff is out of my realm. I see a couple issues but I have not been able to resolve any of them:

1. Twice it says "fatal error: 'EXTERN.h' file not found". But I can locate this file. It's actually in many locations in my home folder and elsewhere on my hard drive.

And 2. Near the end: "/usr/bin/make -- NOT OK"

I tried reinstalling CPAN and updating Perl. The weirdest part is that I can install other modules just fine, provided I do sudo. But running the above command as a super user returns the same thing.

Any help is much appreciated!