[gimp/wip/Jehan/distribute-meson-tarball] libgimp: don't run defcheck.py on Windows.

[Jehan <jehanp src gnome org>]

commit 901be921a21472d7c38a0cdeb237ad184fc27a18
Author: Jehan <jehan girinstud io>
Date:   Mon Aug 1 21:15:32 2022 +0200

    libgimp: don't run defcheck.py on Windows.
    
    Ironically, it is a test for the Windows platform but it cannot run on
    Windows. First, because it expects a .so (which could be easily fixed),
    but even more because from web search, it looks like the nm tool may not
    exist on Windows (though I haven't checked).
    
    Anyway we only ever ran it from Linux machines and up to now, it worked
    just fine and was useful anyway. So let's go with it.

 libgimp/meson.build | 10 ++++++++--
 meson.build         | 14 --------------
 2 files changed, 8 insertions(+), 16 deletions(-)
---
diff --git a/libgimp/meson.build b/libgimp/meson.build
index 34263d3319..8ec49c9d5a 100644
--- a/libgimp/meson.build
+++ b/libgimp/meson.build
@@ -519,8 +519,14 @@ else
   endif
 endif
 
-if have_python
-  # Check .def files for Windows.
+if have_python and not platform_windows
+  # Verify .def files for Windows.
+  # Ironically we only check this on non-Windows platform, since the
+  # script expects .so libraries, and I'm not sure that the `nm` tool is
+  # available on Windows.
+  # On the other hand, it is how it always has been, since we used to
+  # only run this on dist step (which we historically run on a GNU/Linux
+  # machine). And it worked fine until now.
   custom_target('check-def-files',
     input: [
       '../libgimpbase/gimpbase.def',
diff --git a/meson.build b/meson.build
index abf9d891e8..a8be6c2e17 100644
--- a/meson.build
+++ b/meson.build
@@ -1178,7 +1178,6 @@ localedir      = get_option('datadir') / 'locale'
 
 
 # Check for internal tools
-defcheck            = find_program('tools'/'defcheck.py')
 extract_vector_icon = find_program('tools'/'extract-vector-icon.sh')
 generate_changelog  = find_program('tools'/'generate_changelog.sh')
 generate_news       = find_program('tools'/'generate-news')
@@ -1625,19 +1624,6 @@ if xmllint.found()
   )
 endif
 
-if have_python
-  # TODO this python script is waiting for autotools directory/files structure
-  custom_target('check-defs',
-    input : [ ],
-    output: [ 'check-defs', ],
-    command: [
-      find_program(meson.source_root() / 'tools' / 'defcheck.py'),
-      meson.source_root(),
-    ],
-    build_by_default: false,
-  )
-endif
-
 custom_target('Changelog',
   input : [ ],
   output: [ 'Changelog', ],