From 26fb1ae755c6c8983acda689be459fd8a0e2a352 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luca=20Pep=C3=A8=20Sciarria?= <luca.pepesciarria@gmail.com>
Date: Mon, 27 Jan 2025 16:37:23 +0100
Subject: [PATCH] Add CMake export throught <name>Config.cmake and
 <name>TargetsCmake.cmake files

---
 CMakeLists.txt              | 52 +++++++++++++++++++++++++++++--------
 cmake/psblasConfig.cmake.in | 11 ++++++++
 2 files changed, 52 insertions(+), 11 deletions(-)
 create mode 100644 cmake/psblasConfig.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c5946c32..ea499474 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@
 #-----------------------------------
 # Set oldest allowable CMake version
 #-----------------------------------
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.11)
 cmake_policy(VERSION 3.11.1...3.13.3)
 
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
@@ -379,9 +379,17 @@ define_property(TARGET
 #-----------------------------------------------------
 # Publicize installed location to other CMake projects
 #-----------------------------------------------------
+#install(EXPORT ${CMAKE_PROJECT_NAME}-targets
+#  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake"
+#)
+
 install(EXPORT ${CMAKE_PROJECT_NAME}-targets
+  FILE ${CMAKE_PROJECT_NAME}Config.cmake
+  NAMESPACE ${CMAKE_PROJECT_NAME}::
   DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake"
 )
+
+
 include(CMakePackageConfigHelpers) # standard CMake module
 write_basic_package_version_file(
   "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_PROJECT_NAME}ConfigVersion.cmake"
@@ -603,11 +611,11 @@ if(METIS_FOUND)
 
 
 
- # Check for real sizes using try_compile
-include(CheckCSourceCompiles)
+  # Check for real sizes using try_compile
+  include(CheckCSourceCompiles)
 
-# Function to check the size of a type
-function(check_metis_real_type type_name)
+  # Function to check the size of a type
+  function(check_metis_real_type type_name)
     set(source_code "
     #include <metis.h>
     #include <stdio.h>
@@ -638,14 +646,14 @@ function(check_metis_real_type type_name)
     else()
         message(WARNING "Failed to compile test for type size: ${type_name}")
     endif()
-endfunction()
+  endfunction()
 
-# Check for both float and double
-check_metis_real_type(float)
-check_metis_real_type(double)
+  # Check for both float and double
+  check_metis_real_type(float)
+  check_metis_real_type(double)
 
-# Set HAVE_METIS if METIS is found
-add_compile_options(-DHAVE_METIS)
+  # Set HAVE_METIS if METIS is found
+  add_compile_options(-DHAVE_METIS)
 
 
   
@@ -789,6 +797,8 @@ endif()
 
 
 
+
+message(STATUS "\t\t ${CMAKE_INSTALL_LIBDIR}")
 # Install the header files to the include directory
 #install(FILES ${cbind_header_C_files}
 #  DESTINATION include
@@ -824,6 +834,26 @@ if(WIN32)
   endif()
 endif()
 
+# Step 2: Create the configuration file from the template
+configure_package_config_file(
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/psblasConfig.cmake.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/psblasConfig.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/psblas"
+)
+
+# Step 3: Install the generated config files
+install(FILES 
+  "${CMAKE_CURRENT_BINARY_DIR}/psblasConfig.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/psblasConfigVersion.cmake"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/psblas"
+)
+
+# Step 4: Export targets so that the build directory can be used directly
+export(
+  EXPORT ${CMAKE_PROJECT_NAME}-targets
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/psblasTargets.cmake"
+    NAMESPACE psblas::
+)
 #-----------------
 # Add PSBLAS tests
 #-----------------
diff --git a/cmake/psblasConfig.cmake.in b/cmake/psblasConfig.cmake.in
new file mode 100644
index 00000000..a050e9b3
--- /dev/null
+++ b/cmake/psblasConfig.cmake.in
@@ -0,0 +1,11 @@
+# Config file for the installed package
+
+set(psblas_VERSION "@psblas_VERSION@")
+
+# Include directories
+set(psblas_INCLUDE_DIRS "@CMAKE_INSTALL_INCLUDEDIR@")
+
+include(CMakeFindDependencyMacro)
+
+# Provide the targets
+include("${CMAKE_CURRENT_LIST_DIR}/@CMAKE_PROJECT_NAME@Targets.cmake")