cmake: add option ENABLE_WINE to enable support for running cross compiled tests with wine

For details about the ENABLE_WINE option, which support three modes
AUTO|ON|OFF see the documentation of cmake macro check_auto_option().

A custom path for the wine executable can be specified by adding
-DWINE_EXECUTABLE=<path> to the cmake command line.

The cmake related macros were copied from
https://gitlab.freedesktop.org/dbus/dbus/-/blob/master/cmake/modules/Macros.cmake

1 files changed, 32 insertions, 0 deletions

diff --git a/cmake/modules/Macros.cmake b/cmake/modules/Macros.cmake
new file mode 100644
index 0000000..fa0f1fc
--- /dev/null
+++ b/cmake/modules/Macros.cmake
@@ -0,0 +1,32 @@
+#
+# provide option with three states AUTO, ON, OFF
+#
+macro(add_auto_option _name _text _default)
+    if(NOT DEFINED ${_name})
+        set(${_name} ${_default} CACHE STRING "${_text}" FORCE)
+    else()
+        set(${_name} ${_default} CACHE STRING "${_text}")
+    endif()
+    set_property(CACHE ${_name} PROPERTY STRINGS AUTO ON OFF)
+endmacro()
+
+#
+# Ensure that if a tristate ON/OFF/AUTO feature is set to ON,
+# its requirements have been met. Fail with a fatal error if not.
+#
+# _name: name of a variable ENABLE_FOO representing a tristate ON/OFF/AUTO feature
+# _text: human-readable description of the feature enabled by _name, for the
+#        error message
+# _var: name of a variable representing a system property we checked for,
+#       such as an executable that must exist for the feature enabled by _name to work
+# _vartext: what we checked for, for the error message
+#
+macro(check_auto_option _name _text _var _vartext)
+    set(_nameval ${${_name}})
+    set(_varval ${${_var}})
+    #message("debug: _name ${_name} ${_nameval}  _var ${_var} ${_varval}")
+    if(_nameval AND NOT _nameval STREQUAL "AUTO" AND NOT _varval)
+        message(FATAL_ERROR "${_text} requested but ${_vartext} not found")
+    endif()
+endmacro()
+