1 files changed, 32 insertions, 0 deletions
diff --git a/meta/classes-recipe/cmake-qemu.bbclass b/meta/classes-recipe/cmake-qemu.bbclass
new file mode 100644
index 0000000000..46a89e2827
--- /dev/null
+++ b/meta/classes-recipe/cmake-qemu.bbclass
@@ -0,0 +1,32 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+# Not all platforms are supported by Qemu. Using qemu-user therefore
+# involves a certain risk, which is also the reason why this feature
+# is not part of the main cmake class by default.
+#
+# One use case is the execution of cross-compiled unit tests with CTest
+# on the build machine. If CMAKE_EXEWRAPPER_ENABLED is configured,
+#   cmake --build --target test
+# works transparently with qemu-user. If the cmake project is developed
+# with this use case in mind this works very nicely also out of an IDE
+# configured to use cmake-native for cross compiling.
+
+inherit qemu cmake
+
+DEPENDS:append:class-target = "${@' qemu-native' if bb.utils.contains('MACHINE_FEATURES', 'qemu-usermode', True, False, d) else ''}"
+
+cmake_do_generate_toolchain_file:append:class-target() {
+    if [ "${@bb.utils.contains('MACHINE_FEATURES', 'qemu-usermode', 'True', 'False', d)}" ]; then
+        # Write out a qemu wrapper that will be used as exe_wrapper so that cmake
+        # can run target helper binaries through that. This also allows to execute ctest.
+        qemu_binary="${@qemu_wrapper_cmdline(d, '${STAGING_DIR_HOST}', ['${STAGING_DIR_HOST}/${libdir}','${STAGING_DIR_HOST}/${base_libdir}'])}"
+        echo "#!/bin/sh" > "${WORKDIR}/cmake-qemuwrapper"
+        echo "$qemu_binary \"\$@\"" >> "${WORKDIR}/cmake-qemuwrapper"
+        chmod +x "${WORKDIR}/cmake-qemuwrapper"
+        echo "set( CMAKE_CROSSCOMPILING_EMULATOR ${WORKDIR}/cmake-qemuwrapper)" \
+          >> ${WORKDIR}/toolchain.cmake
+    fi
+}