commit 9aea122b0850262bd1a505afc31d725bd4e07990
Author: Timur A. Fatkhullin <amirych@gmail.com>
Date:   Sun Jan 18 17:57:52 2026 +0300

    Initial commmit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9be39f9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+CMakeLists.txt.user
+build
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..a678455
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,126 @@
+cmake_minimum_required(VERSION 3.14)
+
+
+# ******* MOUNT CONTROL COMPONENTS *******
+
+project(mcc LANGUAGES C CXX Fortran VERSION 0.1)
+
+
+# set(CMAKE_BUILD_TYPE Release)
+
+set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
+
+find_package(Threads REQUIRED)
+
+# ******* SPDLOG LIBRARY *******
+
+include(FetchContent)
+include(ExternalProject)
+
+set(SPDLOG_USE_STD_FORMAT ON CACHE INTERNAL "Use of C++20 std::format")
+set(SPDLOG_FMT_EXTERNAL OFF CACHE INTERNAL "Turn off external fmt library")
+
+find_package(spdlog CONFIG)
+if (NOT ${spdlog_FOUND})
+    FetchContent_Declare(spdlog
+    # ExternalProject_Add(spdlog
+         # SOURCE_DIR ${CMAKE_BINARY_DIR}/spdlog_lib
+         # BINARY_DIR ${CMAKE_BINARY_DIR}/spdlog_lib/build
+         GIT_REPOSITORY "https://github.com/gabime/spdlog.git"
+         GIT_TAG "v1.15.1"
+         GIT_SHALLOW TRUE
+         GIT_SUBMODULES ""
+         GIT_PROGRESS TRUE
+         CMAKE_ARGS "-DSPDLOG_USE_STD_FORMAT=ON -DSPDLOG_FMT_EXTERNAL=OFF"
+         # CONFIGURE_COMMAND ""
+         # BUILD_COMMAND ""
+         # INSTALL_COMMAND ""
+         # UPDATE_COMMAND ""
+         # SOURCE_SUBDIR cmake # turn off building
+         OVERRIDE_FIND_PACKAGE
+    )
+    find_package(spdlog CONFIG)
+endif()
+
+# ******* ERFA LIBRARY *******
+
+find_package(PkgConfig REQUIRED)
+
+pkg_check_modules(ERFALIB IMPORTED_TARGET GLOBAL erfa)
+
+if (NOT ERFALIB_FOUND)
+    message(STATUS "\tfetch erfa-lib ...")
+    ExternalProject_Add(erfalib
+        PREFIX ${CMAKE_BINARY_DIR}/erfa_lib
+        GIT_REPOSITORY "https://github.com/liberfa/erfa.git"
+        GIT_TAG "v2.0.1"
+        UPDATE_COMMAND ""
+        PATCH_COMMAND ""
+        LOG_CONFIGURE 1
+        CONFIGURE_COMMAND meson setup --reconfigure -Ddefault_library=static -Dbuildtype=release
+                                  -Dprefix=${CMAKE_BINARY_DIR}/erfa_lib -Dlibdir= -Dincludedir= -Ddatadir= <SOURCE_DIR>
+        BUILD_COMMAND ninja -C <BINARY_DIR>
+        INSTALL_COMMAND meson install -C <BINARY_DIR>
+        BUILD_BYPRODUCTS ${CMAKE_BINARY_DIR}/erfa_lib/liberfa.a
+    )
+
+    add_library(PkgConfig::ERFALIB STATIC IMPORTED GLOBAL)
+    set_target_properties(PkgConfig::ERFALIB PROPERTIES IMPORTED_LOCATION ${CMAKE_BINARY_DIR}/erfa_lib/liberfa.a)
+    set_target_properties(PkgConfig::ERFALIB PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_BINARY_DIR}/erfa_lib)
+    add_dependencies(PkgConfig::ERFALIB erfalib)
+#pkg_check_modules(ERFALIB REQUIRED IMPORTED_TARGET GLOBAL erfa)
+
+endif()
+
+#message(STATUS "ERFA LIBS: ${ERFALIB_LIBRARIES}")
+#message(STATUS "ERFA LIB PATHS: ${ERFALIB_LIBRARY_DIRS}")
+#message(STATUS "ERFA INC PATHS: ${ERFALIB_INCLUDE_DIRS}")
+
+#add_executable(ex main.cpp)
+#target_link_libraries(ex PkgConfig::ERFALIB)
+#target_link_libraries(ex ee)
+
+set(MCC_SRC mcc_concepts.h mcc_epoch.h)
+add_library(${PROJECT_NAME} INTERFACE ${MCC_SRC})
+target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_23)
+target_link_libraries(${PROJECT_NAME} INTERFACE PkgConfig::ERFALIB)
+target_include_directories(
+    ${PROJECT_NAME}
+    INTERFACE
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+        $<INSTALL_INTERFACE:include>
+)
+
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file("${PROJECT_NAME}ConfigVersion.cmake"
+                                 VERSION ${PROJECT_VERSION}
+                                 COMPATIBILITY SameMajorVersion)
+
+
+set(MCC_CONFIG_INSTALLDIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME} CACHE PATH "install path for generated library config files")
+set(MCC_HEADERS_INSTALLDIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE PATH "install path for headers")
+
+configure_package_config_file("${PROJECT_SOURCE_DIR}/${PROJECT_NAME}Config.cmake.in"
+                              "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+                              INSTALL_DESTINATION
+                              ${MCC_CONFIG_INSTALLDIR}
+                              PATH_VARS MCC_HEADERS_INSTALLDIR)
+
+#install(EXPORT ${PROJECT_NAME}_Targets FILE ${PROJECT_NAME}Targets.cmake NAMESPACE ${PROJECT_NAME_NAMESPACE}:: DESTINATION ${MCC_CONFIG_INSTALLDIR})
+#install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake" DESTINATION ${MCC_CONFIG_INSTALLDIR})
+#install(FILES ${MCC_SRC} DESTINATION include/${PROJECT_NAME})
+
+
+# uninstall target
+if(NOT TARGET uninstall)
+    configure_file(
+        "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
+        "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+        IMMEDIATE @ONLY)
+
+    add_custom_target(uninstall
+        COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
+endif()
diff --git a/cmake_uninstall.cmake.in b/cmake_uninstall.cmake.in
new file mode 100644
index 0000000..929b6a0
--- /dev/null
+++ b/cmake_uninstall.cmake.in
@@ -0,0 +1,5 @@
+message(STATUS "Uninstall mcc package ...")
+message(STATUS "remove config files dir: @CMAKE_INSTALL_PREFIX@/@MCC_CONFIG_INSTALLDIR@")
+file(REMOVE_RECURSE "@CMAKE_INSTALL_PREFIX@/@MCC_CONFIG_INSTALLDIR@")
+message(STATUS "remove header files dir: @CMAKE_INSTALL_PREFIX@/@MCC_HEADERS_INSTALLDIR@")
+file(REMOVE_RECURSE "@CMAKE_INSTALL_PREFIX@/@MCC_HEADERS_INSTALLDIR@")
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..540aaa0
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,8 @@
+#include <iostream>
+#include <erfa.h>
+
+int main()
+{
+   std::cout << "AAA\n";
+   return 0;
+}
diff --git a/mccConfig.cmake.in b/mccConfig.cmake.in
new file mode 100644
index 0000000..71d669d
--- /dev/null
+++ b/mccConfig.cmake.in
@@ -0,0 +1,7 @@
+@PACKAGE_INIT@
+
+set_and_check(mcc_INCLUDE_DIR "@PACKAGE_HWT_HEADERS_INSTALLDIR@")
+
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
+check_required_components("@PROJECT_NAME@")
+
diff --git a/mcc_concepts.h b/mcc_concepts.h
new file mode 100644
index 0000000..e69de29
diff --git a/mcc_epoch.h b/mcc_epoch.h
new file mode 100644
index 0000000..e69de29