[Buildroot] [PATCH 2/2] package/gnuradio: remove pybind target suffix when crosscompiling

["Martin Böh via buildroot" <buildroot@buildroot.org>]

This is required as pybind11 uses host python3 and therefore the host platform suffixes.
Without this change gnuradio and all plugins relying on its GrPybind macros, use the wrong suffixes.
This leads to module load failures when crosscompiling.

See:
- https://github.com/gnuradio/gnuradio/issues/5455
- https://github.com/pybind/pybind11/issues/3640

Signed-off-by: Martin Böh <contact@martb.dev>
---
 ...nd-remove-suffix-when-crosscompiling.patch | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 package/gnuradio/0001-grPyBind-remove-suffix-when-crosscompiling.patch

diff --git a/package/gnuradio/0001-grPyBind-remove-suffix-when-crosscompiling.patch b/package/gnuradio/0001-grPyBind-remove-suffix-when-crosscompiling.patch
new file mode 100644
index 0000000000..0ac4395e58
--- /dev/null
+++ b/package/gnuradio/0001-grPyBind-remove-suffix-when-crosscompiling.patch
@@ -0,0 +1,56 @@
+From c58760b002c1a954a9ab628352900fcd8e6e199c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Martin=20B=C3=B6h?= <contact@martb.dev>
+Date: Wed, 22 Feb 2023 03:05:08 +0100
+Subject: [PATCH] grPyBind: fix invalid suffix
+
+This is required as pybind11 uses host python3 and therefore the host platform suffixes.
+---
+ cmake/Modules/GrPybind.cmake | 18 ++++++++++++++++++
+ 1 file changed, 18 insertions(+)
+
+diff --git a/cmake/Modules/GrPybind.cmake b/cmake/Modules/GrPybind.cmake
+index 5a6fb7633..c2df17c2d 100644
+--- a/cmake/Modules/GrPybind.cmake
++++ b/cmake/Modules/GrPybind.cmake
+@@ -8,6 +8,12 @@ macro(GR_PYBIND_MAKE name updir filter files)
+                    ${CMAKE_CURRENT_BINARY_DIR} COPYONLY)
+ 
+     pybind11_add_module(${name}_python ${files})
++    
++    # Use normal .so suffix when crosscompiling
++    # See https://github.com/gnuradio/gnuradio/issues/5455
++    if (CMAKE_CROSSCOMPILING)
++        set_target_properties(${name}_python PROPERTIES SUFFIX ".so")
++    endif()
+ 
+     set(MODULE_NAME ${name})
+     if(${name} STREQUAL gr)
+@@ -135,6 +141,12 @@ macro(GR_PYBIND_MAKE_CHECK_HASH name updir filter files)
+ 
+     pybind11_add_module(${name}_python ${files})
+ 
++    # Use normal .so suffix when crosscompiling
++    # See https://github.com/gnuradio/gnuradio/issues/5455
++    if (CMAKE_CROSSCOMPILING)
++        set_target_properties(${name}_python PROPERTIES SUFFIX ".so")
++    endif()
++
+     set(MODULE_NAME ${name})
+     if(${name} STREQUAL gr)
+         set(MODULE_NAME "runtime")
+@@ -286,6 +298,12 @@ macro(GR_PYBIND_MAKE_OOT name updir filter files)
+ 
+     pybind11_add_module(${name}_python ${files})
+ 
++    # Use normal .so suffix when crosscompiling
++    # See https://github.com/gnuradio/gnuradio/issues/5455
++    if (CMAKE_CROSSCOMPILING)
++        set_target_properties(${name}_python PROPERTIES SUFFIX ".so")
++    endif()
++
+     set(MODULE_NAME ${name})
+     if(${name} STREQUAL gr)
+         set(MODULE_NAME "runtime")
+-- 
+2.39.1
+
-- 
2.39.2

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