Fix installation issue.

The generated header for asio was located in the build folder, but was
included from a public header. It makes the install impossible.

Now the file is generated into the include folder in the proper place
and added to the gitignore.

Author: David Eles

.gitignore

@@ -7,8 +7,9 @@ compile_commands.json
 /*.cpp
 /*.patch
 /*.diff
+/include/execpools/asio/asio_config.hpp
 callgrind.*
 *.pbf
 *.o
 a.out
-*.code-workspace
+*.code-workspace

CMakeLists.txt

@@ -381,7 +381,7 @@ if(STDEXEC_ENABLE_ASIO)
     endif()
 
     file(GLOB_RECURSE boost_pool_sources include/execpools/asio/*.hpp)
-    set(STDEXEC_ASIO_CONFIG_FILE_PATH ${CMAKE_CURRENT_BINARY_DIR}/generated_include/asio)
+    set(STDEXEC_ASIO_CONFIG_FILE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/include/execpools/asio)
     configure_file(include/execpools/asio/asio_config.hpp.in ${STDEXEC_ASIO_CONFIG_FILE_PATH}/asio_config.hpp)
 
     if(${STDEXEC_ASIO_USES_BOOST})
@@ -400,7 +400,6 @@ if(STDEXEC_ENABLE_ASIO)
           STDEXEC::stdexec
           Boost::boost
       )
-      target_include_directories(stdexec_boost_pool INTERFACE ${STDEXEC_ASIO_CONFIG_FILE_PATH})
     elseif(${STDEXEC_ASIO_USES_STANDALONE})
       include(cmake/import_standalone_asio.cmake)
       import_standalone_asio(
@@ -416,7 +415,6 @@ if(STDEXEC_ENABLE_ASIO)
           STDEXEC::stdexec
           asio
       )
-      target_include_directories(stdexec_asio_pool INTERFACE ${STDEXEC_ASIO_CONFIG_FILE_PATH})
     else()
       message(FATAL_ERROR "ASIO implementation is not configured")
     endif()

include/execpools/asio/asio_thread_pool.hpp

@@ -7,8 +7,8 @@
  */
 #pragma once
 
-#include <asio_config.hpp>
 #include <execpools/thread_pool_base.hpp>
+#include <execpools/asio/asio_config.hpp>
 
 namespace execpools {
   class asio_thread_pool : public execpools::thread_pool_base<asio_thread_pool> {