gimp: patch libunwind detection

Gimp 3.0.8's meson file detects the presence of libunwind incorrectly,
making it fail on some platforms (e.g. x86 + musl + clang), even when
libunwind is explicitly disabled:

| <snip>i686-oe-linux-musl-ld: app/core/libappcore.a.p/gimpbacktrace-linux.c.o: in function `gimp_backtrace_get_address_info':
| /usr/src/debug/gimp/3.0.8/../sources/gimp-3.0.8/app/core/gimpbacktrace-linux.c:708:(.text+0xbd7): undefined reference to `_ULx86_init_local'

This backported patch fixes this.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 52 insertions, 0 deletions

diff --git a/meta-gnome/recipes-gimp/gimp/gimp/0001-meson-Fix-libunwind-header-detection-on-non-macOS-pl.patch b/meta-gnome/recipes-gimp/gimp/gimp/0001-meson-Fix-libunwind-header-detection-on-non-macOS-pl.patch
new file mode 100644
index 0000000000..879529b80e
--- /dev/null
+++ b/meta-gnome/recipes-gimp/gimp/gimp/0001-meson-Fix-libunwind-header-detection-on-non-macOS-pl.patch
@@ -0,0 +1,51 @@
+From 8862f36fcec74152afeee2a99c0e04b84b6cf5b3 Mon Sep 17 00:00:00 2001
+From: Bruno Lopes <brunvonlope@outlook.com>
+Date: Sun, 25 Jan 2026 11:11:48 -0300
+Subject: [PATCH] meson: Fix libunwind header detection on non-macOS platforms
+
+Closes: #15750
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/gimp/-/commit/1aa51ca0637db88a4ea958d03fa6692e6ac0289b]
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ meson.build | 17 ++++++++++-------
+ 1 file changed, 10 insertions(+), 7 deletions(-)
+
+diff --git a/meson.build b/meson.build
+index 2192968..cfa1f71 100644
+--- a/meson.build
++++ b/meson.build
+@@ -731,11 +731,14 @@ conf.set('HAVE_LIBBACKTRACE', libbacktrace.found())
+ ## Check for libunwind
+ # In most platforms, unw_*() functions are in the libunwind library.
+ # In macOS, it is on libSystem (there we only need the SDK header).
+-libunwind = ( get_option('libunwind')
+-  ? dependency('libunwind', version: '>=1.1.0', required: false)
+-  : no_dep
+-)
+-have_unwind = libunwind.found() or cc.has_header('libunwind.h', required: false)
++libunwind = no_dep
++if get_option('libunwind')
++  libunwind = dependency('libunwind', version: '>=1.1.0', required: false)
++  libunwind_h = platform_osx ? cc.has_header('libunwind.h', required: false) : false
++  have_unwind = libunwind.found() or libunwind_h
++else
++  have_unwind = false
++endif
+ conf.set('HAVE_LIBUNWIND', have_unwind ? 1 : false)
+ 
+ ## Check for backtrace() API
+@@ -758,11 +761,11 @@ if platform_windows
+ elif platform_linux
+   if not have_execinfo_h
+     dashboard_backtrace='no (missing: execinfo.h)'
+-  elif not libbacktrace.found() and not libunwind.found()
++  elif not libbacktrace.found() and not have_unwind
+     dashboard_backtrace='rough (missing: libbacktrace and libunwind)'
+   elif not libbacktrace.found()
+     dashboard_backtrace='partially detailed (missing: libbacktrace)'
+-  elif not libunwind.found()
++  elif not have_unwind
+     dashboard_backtrace='partially detailed (missing: libunwind)'
+   else
+     dashboard_backtrace='detailed'
diff --git a/meta-gnome/recipes-gimp/gimp/gimp_3.0.8.bb b/meta-gnome/recipes-gimp/gimp/gimp_3.0.8.bb
index 863d9a1667..860fb5d26b 100644
--- a/meta-gnome/recipes-gimp/gimp/gimp_3.0.8.bb
+++ b/meta-gnome/recipes-gimp/gimp/gimp_3.0.8.bb
@@ -60,6 +60,7 @@ SRC_URI = "https://download.gimp.org/gimp/v3.0/${BP}.tar.xz \
            file://0002-meson.build-reproducibility-fix.patch \
            file://0001-meson.build-dont-check-for-lgi.patch \
            file://0001-meson.build-require-iso-codes-native.patch \
+           file://0001-meson-Fix-libunwind-header-detection-on-non-macOS-pl.patch \
            "
 SRC_URI[sha256sum] = "feb498acc01b26827cff1ff95aa8fb82cdd6a60d7abf773cfcd19abeafca3386"