Help needed with gobject-introspection
Ken Brown
kbrown@cornell.edu
Thu May 21 15:13:47 GMT 2020
On 5/21/2020 9:24 AM, Jon Turney wrote:
> On 20/05/2020 15:50, Ken Brown via Cygwin-apps wrote:
>> On 5/19/2020 7:04 PM, Ken Brown via Cygwin-apps wrote:
>>> I would like to adopt gimp and related packages. At the moment I'm having
>>> trouble with babl, which is needed for gegl0.4, which is needed for gimp.
>>> The problem involves gobject-introspection.
>>>
>>> If I disable introspection, the build works fine. This would be OK, since
>>> babl has been built without introspection for several years. But then the
>>> gegl0.4 build complains about the missing babl introspection files, so I
>>> would have to disable introspection there too, which hasn't been done in the
>>> past.
>>>
>>> So my preference is to figure out what the problem is and get the babl build
>>> working with introspection. I'm attaching my cygport file and patch.
>>>
>>> Here's the failing command...
>>>
>>> /usr/bin/g-ir-scanner -I/usr/include/gobject-introspection-1.0
>>> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -D_REENTRANT --no-libtool
>>> --namespace=Babl --nsversion=0.1 --warn-all --output babl/Babl-0.1.gir
>>> --c-include=babl.h '--identifier-filter-cmd=/usr/bin/python3
>>> /tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/babl/identfilter.py'
>>> -DBABL_IS_BEING_COMPILED
>>> -I/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/babl
>>> -I/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl
>>> -I./. -I../. -I./babl/base/. -I../babl/base/.
>>> --filelist=/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl/4170c83@@babl-0.1@sha/Babl_0.1_gir_filelist
>>> --cflags-begin -fno-unsafe-math-optimizations -Wdeclaration-after-statement
>>> -Winit-self -Wmissing-declarations -Wmissing-prototypes
>>> -Wold-style-definition -Wpointer-arith -mmmx -msse -mfpmath=sse -I./. -I../.
>>> -I./babl/base/. -I../babl/base/. --cflags-end --library babl-0.1
>>> -L/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl
>>> --extra-library=m --extra-library=dl --extra-library=lcms2
>>>
>>> ...and the error message:
>>>
>>> g-ir-scanner: link: gcc -o
>>> /tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/tmp-introspectCwCaUc/Babl-0.1.exe
>>> -ggdb -O2 -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
>>> -fstack-protector-strong --param=ssp-buffer-size=4
>>> -fdebug-prefix-map=/tmp/cygbabl/babl-0.1.74-1.x86_64/build=/usr/src/debug/babl-0.1.74-1
>>> -fdebug-prefix-map=/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74=/usr/src/debug/babl-0.1.74-1
>>> /tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/tmp-introspectCwCaUc/Babl-0.1.o
>>> -L. -lbabl-0.1 -lm -ldl -llcms2
>>> -L/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl
>>> -Wl,-rpath,/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl
>>> -lgio-2.0 -lgobject-2.0 -Wl,--export-all-symbols -lgmodule-2.0 -lglib-2.0 -lintl
>>> ERROR: can't resolve libraries to shared libraries: babl-0.1
>>>
>>> I don't understand the error message, because the command line contains
>>>
>>> -L/tmp/cygbabl/babl-0.1.74-1.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/babl
>>>
>>> and that directory contains libbabl-0.1.dll.a and cygbabl-0.1-0.dll. I even
>>> tried adding that directory to my PATH to make sure the right
>>> cygbabl-0.1-0.dll would be found, but that didn't help.
>
> This might possibly be related to the problem described in the comment for:
>
> https://github.com/mesonbuild/meson/pull/2880/commits/8a27c08b05e4537d5061d30ddd8aad9dc52cf1c4
>
>
>> By the way, in case you're wondering why I disabled the building of docs, it's
>> because I was getting a build failure there too. I don't know if this is
>> related to the introspection failure. The failing command there is
>>
>> /usr/bin/meson --internal exe --unpickle
>> /tmp/cygbabl/babl-0.1.74-2.x86_64/src/babl-0.1.74/x86_64-pc-cygwin/meson-private/meson_exe_env_7bf39b99114d34540b83d26a5d8f097e05882836.dat
>>
>> cp: target 'docs/index.html.tmp' is not a directory
>>
>> I don't know why it's not showing me the actual cp command that fails.
>
> I believe it's is an infelicity in meson that it doesn't echo the actual failing
> command here.
>
> Noted here: https://github.com/mesonbuild/meson/pull/3716#issuecomment-395746838
>
>> The corresponding information in docs/meson.build is
>>
>> Reference_html = custom_target('Reference.html',
>> input : [
>> 'Reference-static.html',
>> 'toc',
>> index_html_tmp,
>> ],
>> output: [ 'Reference.html', ],
>> command: [
>> env_bin,
>> 'cp', '@INPUT0@', '@OUTPUT@',
>> '&&', xml_insert, '@OUTPUT@', 'TOC', '@INPUT1@',
>> '&&', xml_insert, '@OUTPUT@', 'BablBase', '@INPUT2@',
>> ],
>> build_by_default: true,
>> )
>>
>> There are several such custom targets in the file, and for all except this
>> one, I see the actual cp command in the log. This is the only one for which
>> meson generates a 'meson --unpickle' command instead of a cp command.
>
> Yeah, I wasn't expecting it to use this method of executing the command line
> (storing it in a pickle and then using a python wrapper to execute it) to be
> used except on Windows, so I'll have to take a more detailed look at why that's
> happening.
Thanks. FWIW, the recipe for building docs/Reference.html translates to
/usr/bin/env \
cp ../docs/Reference-static.html docs/Reference.html \
&& ../docs/tools/xml_insert.sh docs/Reference.html TOC ../docs/toc \
&& ../docs/tools/xml_insert.sh \
docs/Reference.html BablBase docs/index.html.tmp
This succeeds when run manually in the build directory. So something must have
gone wrong in the pickling/unpickling process.
Ken
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