[rpms/mingw-gtkmm30] rawhide: Add gtkmm_generate-binding.patch

[rpms/mingw-gtkmm30] rawhide: Add gtkmm_generate-binding.patch

[Sandro Mani]

A new commit has been pushed.

Repo   : rpms/mingw-gtkmm30
Branch : rawhide
Commit : 9e0f12d980829141b07475c7dedc9f553aa374f1
Author : Sandro Mani <manisandro@gmail.com>
Date   : 2026-06-17T23:50:02+02:00
Stats  : +15/-0 in 2 file(s)
URL    : https://src.fedoraproject.org/rpms/mingw-gtkmm30/c/9e0f12d980829141b07475c7dedc9f553aa374f1?branch=rawhide

Log:
Add gtkmm_generate-binding.patch

---
diff --git a/gtkmm_generate-binding.patch b/gtkmm_generate-binding.patch
new file mode 100644
index 0000000..19ea5ae
--- /dev/null
+++ b/gtkmm_generate-binding.patch
@@ -0,0 +1,13 @@
+diff -rupN gtkmm-3.24.11/untracked/build_scripts/generate-binding.py gtkmm-3.24.11-new/untracked/build_scripts/generate-binding.py
+--- gtkmm-3.24.11/untracked/build_scripts/generate-binding.py	2026-06-09 19:26:15.914255400 +0200
++++ gtkmm-3.24.11-new/untracked/build_scripts/generate-binding.py	2026-06-17 23:47:24.185093947 +0200
+@@ -91,7 +91,8 @@ def install_built_h_files():
+   # <built_h_dir> is an absolute path in the build directory or source directory.
+   # <install_subdir> is an installation directory, relative to {prefix}.
+   built_h_dir = sys.argv[2]
+-  install_dir = os.path.join(os.getenv('MESON_INSTALL_DESTDIR_PREFIX'), sys.argv[3])
++  buildroot = os.getenv('MESON_INSTALL_DESTDIR_PREFIX', "").removesuffix(os.getenv('MESON_INSTALL_PREFIX', ''))
++  install_dir = buildroot + sys.argv[3]
+ 
+   # Create the installation directory, if it does not exist.
+   os.makedirs(os.path.join(install_dir, 'private'), exist_ok=True)

diff --git a/mingw-gtkmm30.spec b/mingw-gtkmm30.spec
index 3846d07..66fb04b 100644
--- a/mingw-gtkmm30.spec
+++ b/mingw-gtkmm30.spec
@@ -11,6 +11,8 @@ Summary:        MinGW Windows C++ interface for the GTK+ library
 License:        LGPL-2.0-or-later
 URL:            http://www.gtkmm.org/
 Source0:        http://ftp.gnome.org/pub/GNOME/sources/gtkmm/%{release_version}/gtkmm-%{version}.tar.xz
+# Fix DESTDIR handlin by generate-binding.py
+Patch0:         gtkmm_generate-binding.patch
 
 BuildArch:      noarch