pdftk runtime error

[fgdb (Fico)]

MacOS Mojave Version 10.14.5

% uname -a

Darwin NNN.local 18.6.0 Darwin Kernel Version 18.6.0: Thu Apr 25 23:16:27 PDT 2019; root:xnu-4903.261.4~2/RELEASE_X86_64 x86_64

% xcodebuild -version Xcode 10.2.1 Build version 10E1001

% port installed pdftk gcc5

The following ports are currently installed:

gcc5 @5.5.0_4 (active)

pdftk @2.02_0+gcc5 (active)

% otool -L /opt/local/bin/pdftk

/opt/local/bin/pdftk:

/opt/local/lib/gcc5/libgcj.16.dylib (compatibility version 17.0.0, current version 17.0.0)

/opt/local/lib/libgcc/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.25.0)

/opt/local/lib/libgcc/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)

/opt/local/lib/libiconv.2.dylib (compatibility version 9.0.0, current version 9.0.0)

/opt/local/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.11)

/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.200.5)

Problem:

% pdftk O25a.pdf O26a.pdf cat output TMP

dyld: _dyld_bind_fully_image_containing_address() error

dyld: Symbol not found: darwin10_Unwind_FindEnclosingFunction

Referenced from: /opt/local/lib/gcc5/libgcj.16.dylib

Expected in: /opt/local/lib/libgcc/libgcc_s.1.dylib

in /opt/local/lib/gcc5/libgcj.16.dylib

Abort trap: 6