From cd62475738fc3c8be92cffa24f19035781824734 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Wed, 12 Jun 2024 12:30:54 -0400
Subject: [PATCH] xo-cmake: + xo-bootstrap-macros.cmake

---
 CMakeLists.txt                            |  1 +
 share/xo-macros/xo-bootstrap-macros.cmake | 35 +++++++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 share/xo-macros/xo-bootstrap-macros.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index be90131..0e28d3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,6 +47,7 @@ install(
     FILES
     "share/xo-macros/gen-ccov.in"
     "share/xo-macros/Doxyfile.in"
+    "share/xo-macros/xo-bootstrap-macros.cmake"
     PERMISSIONS OWNER_READ OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
     DESTINATION ${CMAKE_INSTALL_DATADIR}/xo-macros
 )
diff --git a/share/xo-macros/xo-bootstrap-macros.cmake b/share/xo-macros/xo-bootstrap-macros.cmake
new file mode 100644
index 0000000..aba3116
--- /dev/null
+++ b/share/xo-macros/xo-bootstrap-macros.cmake
@@ -0,0 +1,35 @@
+# ----------------------------------------------------------------
+# for example:
+#   $ PREFIX=/usr/local   # for example
+#   $ cmake -DCMAKE_MODULE_PATH=prefix -DCMAKE_INSTALL_PREFIX=$PREFIX -B .build
+#
+# will get
+#   CMAKE_MODULE_PATH
+# from xo-cmake-config --cmake-module-path
+#
+# and expect .cmake macros in
+#   CMAKE_MODULE_PATH/xo_macros/xo_cxx.cmake
+# ----------------------------------------------------------------
+
+find_program(XO_CMAKE_CONFIG_EXECUTABLE NAMES xo-cmake-config REQUIRED)
+
+if ("${XO_CMAKE_CONFIG_EXECUTABLE}" STREQUAL "XO_CMAKE_CONFIG_EXECUTABLE-NOT_FOUND")
+    message(FATAL "could not find xo-cmake-config executable")
+endif()
+
+message(STATUS "XO_CMAKE_CONFIG_EXECUTABLE=${XO_CMAKE_CONFIG_EXECUTABLE}")
+
+if (NOT XO_SUBMODULE_BUILD)
+    if (("${CMAKE_MODULE_PATH}" STREQUAL "") OR ("${CMAKE_MODULE_PATH}" STREQUAL prefix))
+        # default to typical install location for xo-project-macros
+        execute_process(COMMAND ${XO_CMAKE_CONFIG_EXECUTABLE} --cmake-module-path OUTPUT_VARIABLE CMAKE_MODULE_PATH)
+        message(STATUS "CMAKE_MODULE_PATH=${CMAKE_MODULE_PATH}")
+    endif()
+endif()
+
+# needs to have been installed somewhere on CMAKE_MODULE_PATH,
+# (e.g. from xo-cmake with the same value for CMAKE_INSTALL_PREFIX)
+#
+include(xo_macros/xo_cxx)
+
+xo_cxx_bootstrap_message()