[pangomm/meson.msvc: 3/4] meson: Don't build generate_extra_defs on MSVC

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

commit a19dc9396f9c8e697e2a7bf2ee8c955a3790322c
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Oct 15 12:56:10 2019 +0800

    meson: Don't build generate_extra_defs on MSVC
    
    This depends on portions in glibmm tat is not applicable directly to
    MSVC builds, so skip building this on MSVC

 tools/extra_defs_gen/meson.build | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)
---
diff --git a/tools/extra_defs_gen/meson.build b/tools/extra_defs_gen/meson.build
index 03d2cd8..35d9315 100644
--- a/tools/extra_defs_gen/meson.build
+++ b/tools/extra_defs_gen/meson.build
@@ -3,14 +3,16 @@
 # Input: cpp_compiler, pangomm_build_dep, install_libdir, pangomm_pcname
 # Output: m4_files, install_m4dir
 
-glibmm_generate_extra_defs_dep = cpp_compiler.find_library(
-  'glibmm_generate_extra_defs-2.64',
-)
+if not is_msvc
+  glibmm_generate_extra_defs_dep = cpp_compiler.find_library(
+    'glibmm_generate_extra_defs-2.64',
+  )
 
-executable('generate_extra_defs', 'generate_defs_pango.cc',
-  dependencies: [pangomm_build_dep, glibmm_generate_extra_defs_dep],
-  install: false,
-)
+  executable('generate_extra_defs', 'generate_defs_pango.cc',
+    dependencies: [pangomm_build_dep, glibmm_generate_extra_defs_dep],
+    install: false,
+  )
+endif
 
 # Install m4 files for reuse by other *mm projects, when building from git.
 m4_basefiles = [