[glibmm] Prepare existing files for building with Meson

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 1df52bb90b7ca3780043b16acf5bb5eb483876f8
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Sun Mar 1 10:25:28 2020 +0100

    Prepare existing files for building with Meson
    
    * examples/network/resolver.cc: Don't include config.h. It's not used.
    * glib/glibmm/ustring.cc: Check if GLIBMM_SIZEOF_WCHAR_T is defined.
    * tools/generate_wrap_init.pl.in:
    * tools/gmmproc.in: Change '\@' to '\ @'. Meson's configure_file()
    removes a backslash immediately before an at-sign.

 examples/network/resolver.cc   | 3 ---
 glib/glibmm/ustring.cc         | 8 ++++++++
 tools/generate_wrap_init.pl.in | 6 ++++--
 tools/gmmproc.in               | 4 +++-
 4 files changed, 15 insertions(+), 6 deletions(-)
---
diff --git a/examples/network/resolver.cc b/examples/network/resolver.cc
index 949a0d04..8281783e 100644
--- a/examples/network/resolver.cc
+++ b/examples/network/resolver.cc
@@ -17,9 +17,6 @@
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _WIN32
-#include <config.h>
-#endif
 #include <giomm.h>
 #include <iostream>
 #include <mutex>
diff --git a/glib/glibmm/ustring.cc b/glib/glibmm/ustring.cc
index 1a5026f4..ebf7c0dd 100644
--- a/glib/glibmm/ustring.cc
+++ b/glib/glibmm/ustring.cc
@@ -29,6 +29,14 @@
 #include <config.h>
 #endif
 
+// If glibmm is built with Autotools, GLIBMM_SIZEOF_WCHAR_T is not defined and
+// SIZEOF_WCHAR_T is defined in config.h.
+// If glibmm is built with Meson, config.h does not exist and
+// GLIBMM_SIZEOF_WCHAR_T is defined in glibmmconfig.h.
+#if !defined(SIZEOF_WCHAR_T) && defined(GLIBMM_SIZEOF_WCHAR_T)
+#define SIZEOF_WCHAR_T GLIBMM_SIZEOF_WCHAR_T
+#endif
+
 namespace
 {
 
diff --git a/tools/generate_wrap_init.pl.in b/tools/generate_wrap_init.pl.in
index cf573477..6e4dcf3c 100644
--- a/tools/generate_wrap_init.pl.in
+++ b/tools/generate_wrap_init.pl.in
@@ -151,14 +151,16 @@ while ($ARGV[0])
       my $basename = lc($ccast);
       my @names = ($cppname, $basename, @extra_namespace);
 
+      # Don't remove the space between \ and @. When glibmm is built with Meson,
+      # the \ would be removed in generate_wrap_int.pl.
       if ($type_of_class eq "_CLASS_GOBJECT" or
           $type_of_class eq "_CLASS_GTKOBJECT")
       {
-        push(@{$objects{$filename_header}}, \@names);
+        push(@{$objects{$filename_header}}, \ @names);
       }
       elsif ($type_of_class eq "_WRAP_GERROR")
       {
-        push(@{$exceptions{$filename_header}}, \@names);
+        push(@{$exceptions{$filename_header}}, \ @names);
       }
     }
     elsif (/\b_INCLUDE_IN_WRAP_INIT\((.+)\)/)
diff --git a/tools/gmmproc.in b/tools/gmmproc.in
index 56b44e62..264955fa 100644
--- a/tools/gmmproc.in
+++ b/tools/gmmproc.in
@@ -73,7 +73,9 @@ sub parse_command_line_args();
 #main()
 parse_command_line_args();
 
-my $objOutputter = &Output::new($main::m4path, \@main::macrodirs);
+# Don't remove the space between \ and @. When glibmm is built with Meson,
+# the \ would be removed in gmmproc.
+my $objOutputter = &Output::new($main::m4path, \ @main::macrodirs);
 my $objWrapParser = &WrapParser::new($objOutputter);
 
 $$objWrapParser{srcdir} = $main::srcdir;