pdftk @2.02_0+gcc5 calls abort() with symbol __darwin10_Unwind_FindEnclosingFunction not found on 10.14 (since gcc9 @9.1.0?); pdftk build also broken because gcj-mp-5 (from gcc5 @5.5.0_4) abort()s in the same way; likely all else built with gcj also affected

[markmentovai (Mark Mentovai)]

Port pdftk @2.02_0+gcc5 is broken on macOS 10.14 (and presumably all macOS since 10.7). It was built using gcj-mp-5 from port gcc5, and its runtime library libgcj.16.dylib references a symbol, __darwin10_Unwind_FindEnclosingFunction, expected to be provided by libgcc_s.1.dylib.

% qpdf --empty out1.pdf
% qpdf --empty out2.pdf
% pdftk out1.pdf out1.pdf2 output out.pdf
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
zsh: abort      pdftk out1.pdf out1.pdf2 output out.pdf

Since ​macports-ports ac5a416fd8dc, libgcc_s.1.dylib is provided by port libgcc9 @9.1.0 on macOS 10.7 and later. GCC 9 no longer offers __darwin10_Unwind_FindEnclosingFunction in libgcc_s.1.dylib. This is a change in upstream GCC as of ​gcc 738b5536dcf3. __darwin10_Unwind_FindEnclosingFunction is now provided by d10-uwfef.o. But gcj-mp-5 from port gcc5, which built pdftk, doesn’t know to look for it.

In addition, I attempted to build pdftk from source:

% sudo port install -s pdftk

But the build fails when gcj-mp-5 calls abort() on failing to resolve the same symbol. A snippet from the build log:

:info:build Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/pdftk" && /usr/bin/make -w all -f Makefile.OSX-10.6 VERSUFF=-mp-5 
:debug:build system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/pdftk" && /usr/bin/make -w all -f Makefile.OSX-10.6 VERSUFF=-mp-5 
:info:build make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/pdftk'
:info:build /Applications/Xcode.app/Contents/Developer/usr/bin/make -f Makefile -iC /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/pdftk/../java all
:info:build make[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/java'
:info:build /opt/local/bin/gcj-mp-5 -Wall -fsource=1.3 -O2 --encoding=UTF-8 --classpath="/opt/local/share/java/libgcj-5.5.0.jar:/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/java:." -C pdftk/com/lowagie/text/Anchor.java
:info:build dyld: _dyld_bind_fully_image_containing_address() error
:info:build dyld: Symbol not found: __darwin10_Unwind_FindEnclosingFunction
:info:build   Referenced from: /opt/local/lib/gcc5/libgcj.16.dylib
:info:build   Expected in: /opt/local/lib/gcc5/libgcc_s.1.dylib
:info:build  in /opt/local/lib/gcc5/libgcj.16.dylib
:info:build gcj-mp-5: internal compiler error: Abort trap: 6 (program ecj1)
:info:build Please submit a full bug report,
:info:build with preprocessed source if appropriate.
:info:build See <https://trac.macports.org/newticket> for instructions.
:info:build make[1]: [pdftk/com/lowagie/text/Anchor.class] Error 4 (ignored)
[…]
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_textproc_pdftk/pdftk/work/pdftk-2.02-dist/pdftk" && /usr/bin/make -w all -f Makefile.OSX-10.6 VERSUFF=-mp-5 
:info:build Exit code: 2
:error:build Failed to build pdftk: command execution failed
:debug:build Error code: CHILDSTATUS 42718 2

[kencu (Ken)]

same issue on 10.6.8 with gcj now (if using libgcc9, at least).

There is a very similar function in the current library:

$ nm /opt/local/lib/libgcc/libgcc_s.1.dylib | grep FindEnclosing
000000000000a067 T __Unwind_FindEnclosingFunction

and see <​http://gcc.1065356.n8.nabble.com/darwin10-Unwind-FindEnclosingFunction-td782236.html>

[markmentovai (Mark Mentovai)]

Here’s one way to fix it: ​macports-ports pull request 4309.

[nakatamaho (NAKATA Maho)]

BTW: there is an alternative to pdftk. pdftk-java ​https://gitlab.com/pdftk-java/pdftk thanks

[mouse07410 (Mouse)]

Strongly recommend upgrading this port to gcc9.

[kencu (Ken)]

can't. gcj was dropped long ago, and the last we have it is gcc5.

[mouse07410 (Mouse)]

can't. gcj was dropped long ago, and the last we have it is gcc5.

Ouch...

How much of gcj functionality does pdftk actually use? Is it feasible to retrofit/reincarnate the missing capabilities to gcc9/gcc10? I don't think the whole gcj is needed???

[someuser12]

Replying to nakatamaho:

BTW: there is an alternative to pdftk. pdftk-java ​https://gitlab.com/pdftk-java/pdftk

Many thanks for pointing this. I submitted a Portfile proposal for pdftk-java in #58757.

[fhgwright (Fred Wright)]

I don't think "normal" priority is appropriate when something that used to work is now completely broken.

[markmentovai (Mark Mentovai)]

In e9f48ba8719d3752218b65b6893c002d5ef7cd6a/macports-ports (master):

gcc5: libgcj compatibility with libgcc9

libgcc_s.1.dylib formerly provided
darwin10_Unwind_FindEnclosingFunction, but this is no longer true as
of GCC 9.1.0. This symbol is used by libgcj, and its absence causes the
compiler gcj-mp-5 and ports that are built by gcj to abort on any
attempted call. Provide a hidden definition in gcc5's libgcj.16.dylib
for libgcj's own use.

gcc5 is the most recent MacPorts GCC port to provide gcj.

Closes: #58469