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-rw-r--r--meson/mesonbuild/cmake/data/preload.cmake82
1 files changed, 82 insertions, 0 deletions
diff --git a/meson/mesonbuild/cmake/data/preload.cmake b/meson/mesonbuild/cmake/data/preload.cmake
new file mode 100644
index 000000000..234860b75
--- /dev/null
+++ b/meson/mesonbuild/cmake/data/preload.cmake
@@ -0,0 +1,82 @@
+if(MESON_PS_LOADED)
+ return()
+endif()
+
+set(MESON_PS_LOADED ON)
+
+cmake_policy(PUSH)
+cmake_policy(SET CMP0054 NEW) # https://cmake.org/cmake/help/latest/policy/CMP0054.html
+
+# Dummy macros that have a special meaning in the meson code
+macro(meson_ps_execute_delayed_calls)
+endmacro()
+
+macro(meson_ps_reload_vars)
+endmacro()
+
+macro(meson_ps_disabled_function)
+ message(WARNING "The function '${ARGV0}' is disabled in the context of CMake subprojects.\n"
+ "This should not be an issue but may lead to compilation errors.")
+endmacro()
+
+# Helper macro to inspect the current CMake state
+macro(meson_ps_inspect_vars)
+ set(MESON_PS_CMAKE_CURRENT_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+ set(MESON_PS_CMAKE_CURRENT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+ meson_ps_execute_delayed_calls()
+endmacro()
+
+
+# Override some system functions with custom code and forward the args
+# to the original function
+macro(add_custom_command)
+ meson_ps_inspect_vars()
+ _add_custom_command(${ARGV})
+endmacro()
+
+macro(add_custom_target)
+ meson_ps_inspect_vars()
+ _add_custom_target(${ARGV})
+endmacro()
+
+macro(set_property)
+ meson_ps_inspect_vars()
+ _set_property(${ARGV})
+endmacro()
+
+function(set_source_files_properties)
+ set(FILES)
+ set(I 0)
+ set(PROPERTIES OFF)
+
+ while(I LESS ARGC)
+ if(NOT PROPERTIES)
+ if("${ARGV${I}}" STREQUAL "PROPERTIES")
+ set(PROPERTIES ON)
+ else()
+ list(APPEND FILES "${ARGV${I}}")
+ endif()
+
+ math(EXPR I "${I} + 1")
+ else()
+ set(ID_IDX ${I})
+ math(EXPR PROP_IDX "${ID_IDX} + 1")
+
+ set(ID "${ARGV${ID_IDX}}")
+ set(PROP "${ARGV${PROP_IDX}}")
+
+ set_property(SOURCE ${FILES} PROPERTY "${ID}" "${PROP}")
+ math(EXPR I "${I} + 2")
+ endif()
+ endwhile()
+endfunction()
+
+# Disable some functions that would mess up the CMake meson integration
+macro(target_precompile_headers)
+ meson_ps_disabled_function(target_precompile_headers)
+endmacro()
+
+set(MESON_PS_DELAYED_CALLS add_custom_command;add_custom_target;set_property)
+meson_ps_reload_vars()
+
+cmake_policy(POP)