[gtkmm/use-dllexport: 44/60] meson.build: Always use gendef.exe for Visual Studio, for now

[Chun-wei Fan <fanchunwei src gnome org>]

commit 601cfd5cc9ab9f51bd2d938a5b587713bfb3d189
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Jun 4 17:18:15 2020 +0800

    meson.build: Always use gendef.exe for Visual Studio, for now
    
    The gtkmm headers and gmmproc .m4 files need to be updated so that we can use
    __declspec(dllexport) to export the classes and APIs in gdkmm and gtkmm, so
    before that happens, we stick to always using gendef.exe for now.
    
    When the headers and .m4 files do get updated, we will drop gendef.exe from
    gtkmm master since we already depended on a glibmm version that has the
    infrastructure in place to generate headers with the appropriate decorations

 meson.build | 24 ++++--------------------
 1 file changed, 4 insertions(+), 20 deletions(-)
---
diff --git a/meson.build b/meson.build
index a2d0f148..e2b1b05e 100644
--- a/meson.build
+++ b/meson.build
@@ -183,7 +183,6 @@ generate_binding_py = script_dir / 'generate-binding.py'
 doc_reference_py = script_dir / 'doc-reference.py'
 dist_changelog_py = script_dir / 'dist-changelog.py'
 dist_build_scripts_py = script_dir / 'dist-build-scripts.py'
-check_dllexport_usage_py = script_dir / 'check-dllexport-usage.py'
 
 if maintainer_mode
   # Copy files to untracked/build_scripts and untracked/doc.
@@ -205,31 +204,16 @@ endif
 gtkmm_script_dir = project_source_root / 'tools'
 dummy_header_py = gtkmm_script_dir / 'dummy-header.py'
 
-# Do we build the gdkmm/gtkmm without using gendef.exe?
+# Do we build the gdkmm/gtkmm without using gendef.exe?  TODO: Remove later
 gdkmm_extra_gendef_cpp_args = []
 gtkmm_extra_gendef_cpp_args = []
 if is_msvc
   add_project_arguments(cpp_compiler.get_supported_arguments([ '/utf-8', '/wd4828']), language: 'cpp')
   add_project_arguments(cpp_compiler.get_supported_arguments([ '/utf-8']), language: 'c')
 
-  # Check for the first line in a file generated with gmmproc,
-  # to see which gmmproc version was used
-  if maintainer_mode
-    check_gmmproc_ver_cmd = [
-      python3, check_dllexport_usage_py,
-      '--gmmprocdir=@0@'.format(gmmproc_dir),
-    ]
-  else
-    check_gmmproc_ver_cmd = [
-      python3, check_dllexport_usage_py,
-      '--file=@0@/untracked/gtk/gtkmm/aboutdialog.h'.format('/'.join(project_source_root.split('\\')))
-    ]
-  endif
-
-  # Enable __declspec(dllexport) if the gtkmm headers generated from the .hg files
-  # were generated using a recent enough gmmproc
-  build_shared_libs_directly = run_command(check_gmmproc_ver_cmd).returncode() == 0
-  message('Using __declspec(dllexport) to build gtkmm: @0@'.format(build_shared_libs_directly ? 'YES' : 
'NO'))
+  # Use gendef for now, for all gtkmm-4.x builds.  We will always use __declspec(dllexport)
+  # when the .hg's can be generated with GDKMM_API/GTKMM_API.
+  build_shared_libs_directly = false
   if not build_shared_libs_directly
     gdkmm_extra_gendef_cpp_args += '-DGDKMM_USE_GENDEF'
     gtkmm_extra_gendef_cpp_args = gdkmm_extra_gendef_cpp_args + [ '-DGTKMM_USE_GENDEF' ]