'Abort trap: 6' on macOS Catalina

[ernstki]

Hi, everyone. I'm trying to build the 0.9.8 tarball on macOS 10.15.7 (Catalina) to no avail.

I suspect (based on warnings running build.sh) that it's not xidel's problem, but a problem with my development setup, which is mostly based on MacPorts, but I do have the Xcode command line tools (2373) installed, so that's where the C compiler and linker are coming from.

I was, at one point, able to build this on another Catalina machine, so I just copied xidel and xidel.1 from that machine, and so I'm not totally stuck here. But it still seems like a good thing to try and resolve, in case somebody else finds themself in the same situation.

Here are as many details as I think might be relevant, including the standard error and standard output from invoking ./build.sh.

• xidel-0.9.8.src.tar.gz from Sourceforge, which seems to be byte-for-byte identical with the tarball from the GitHub release page
• macOS 10.15.7
• fpc 3.2.2 from MacPorts
• when I run Xcode, which I rarely need to do, I mount and run it from an external device, because my internal storage is tight on space
• Xcode Command Line Tools 2373
• gcc is Apple clang version 12.0.0 (clang-1200.0.32.29)
  • Update: also tried on a freshly-unpacked tarball with gcc (10.3.0) and ld both coming from the MacPorts gcc10 port instead of Apple's built-in ones. Same result.

Note
The .o files mentioned in the linker warnings are coming from the MacPorts version of Free Pascal. Seems
like those should be harmless warnings anyway?

Standard error of ./build.sh on a freshly-extracted xidel-0.9.8.src.tar.gz

ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/sysinit.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/system.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/objpas.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/classes.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/sysutils.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/types.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/typinfo.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/rtlconsts.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/errors.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/unix.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/unixtype.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/baseunix.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/sysconst.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/unixutil.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/initc.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/sysctl.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/ctypes.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/math.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-base/contnrs.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/dl.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-base/base64.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl-objpas/strutils.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/xmlread.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/xmlutils.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/dtdmodel.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/dom.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/xmlreader.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-base/uriparser.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-xml/xmltextreader.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/termio.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-process/process.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-process/pipes.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-json/jsonscanner.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-base/syncobjs.o) was built for newer macOS version (10.15) than being linked (10.9)ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/dynlibs.o) was built for newer macOS version (10.15) than being linked (10.9)
ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl-extra/sockets.o) was built for newer macOS version (10.15) than being linked (10.9)

ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/fcl-net/netdb.o) was built for newer macOS version (10.15) than being linked (10.9)

The standard out was too long to include in the issue description, so it's attached instead.

Expected result

$ ./build.sh
[lots of output]

$ ./xidel --version
Xidel 0.9.8

http://www.videlibri.de/xidel.html
by Benito van der Zander <benito@benibela.de>

Actual result

$ ./xidel --version
Abort trap: 6

[benibela]

Note
The .o files mentioned in the linker warnings are coming from the MacPorts version of Free Pascal. Seems
like those should be harmless warnings anyway?

I do not see any linker warnings

Abort trap: 6

That error could be anything

Run it with gdb, ltrace or strace to see what it is actually doing

[ernstki]

The linker warnings are under a <detail> in the issue description. Here is an example:

ld: warning: object file (/opt/local/libexec/fpc/lib/fpc/3.2.2/units/x86_64-darwin/rtl/sysinit.o) was built for newer macOS version (10.15) than being linked (10.9)

Using gdb was my first instinct, but gdb on macOS needs to be code-signed, and I couldn't get the one from MacPorts to work. (It hangs when I run --help and must be kill -9'd.) There is no strace on macOS; there is dtrace, but it's nowhere near as straightforward to use. Such is life outside the walled garden of Xcode, and I make no excuses for that.

If Abort trap: 6 could be "anything," I'll close this ticket. Thanks anyway. I have a workaround for now.

Regardless, Xidel is super-handy, and thanks for making it!