Rework install paths

The install paths can now be configured by setting the corresponding
SOCI_INSTALL_* variables.

Additionally, this commit fixes the header files being installed under
.../soci/soci/bla.h (two "soci" subdirs) and now install properly under
.../soci/bla.h

CMakeLists.txt

@@ -1,3 +1,4 @@
+# Note: we need >= v3.23 in order to make use of file sets for header installation
 cmake_minimum_required(VERSION 3.23 FATAL_ERROR)
 
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
@@ -103,10 +104,7 @@ set(SOCI_DEBUG_POSTFIX "${CMAKE_DEBUG_POSTFIX}" CACHE STRING "Specifies suffix f
 
 
 include(soci_compiler_options)
-
-include(GNUInstallDirs)
-
-set(SOCI_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/soci-${PROJECT_VERSION}")
+include(soci_install_dirs)
 
 add_subdirectory(src)
 

src/backends/db2/CMakeLists.txt

@@ -59,14 +59,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::DB2)
 install(
   TARGETS soci_db2
   EXPORT SOCIDB2Targets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/empty/CMakeLists.txt

@@ -39,14 +39,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::Empty)
 install(
   TARGETS soci_empty
   EXPORT SOCIEmptyTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/firebird/CMakeLists.txt

@@ -66,14 +66,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::Firebird)
 install(
   TARGETS soci_firebird
   EXPORT SOCIFirebirdTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/mysql/CMakeLists.txt

@@ -61,14 +61,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::MySQL)
 install(
   TARGETS soci_mysql
   EXPORT SOCIMySQLTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+    FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/odbc/CMakeLists.txt

@@ -60,14 +60,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::ODBC)
 install(
   TARGETS soci_odbc
   EXPORT SOCIODBCTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/oracle/CMakeLists.txt

@@ -61,14 +61,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::Oracle)
 install(
   TARGETS soci_oracle
   EXPORT SOCIOracleTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/postgresql/CMakeLists.txt

@@ -71,14 +71,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::PostgreSQL)
 install(
   TARGETS soci_postgresql
   EXPORT SOCIPostgreSQLTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/backends/sqlite3/CMakeLists.txt

@@ -60,14 +60,14 @@ target_link_libraries(soci_interface INTERFACE SOCI::SQLite3)
 install(
   TARGETS soci_sqlite3
   EXPORT SOCISQLite3Targets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file

src/core/CMakeLists.txt

@@ -159,14 +159,14 @@ endif()
 install(
   TARGETS soci_core
   EXPORT SOCICoreTargets
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/soci"
+  RUNTIME DESTINATION "${SOCI_INSTALL_BINDIR}"
     COMPONENT soci_runtime
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  LIBRARY DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT          soci_runtime
     NAMELINK_COMPONENT soci_development
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/soci"
+  ARCHIVE DESTINATION "${SOCI_INSTALL_LIBDIR}"
     COMPONENT soci_development
-  FILE_SET headers DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/soci"
+  FILE_SET headers DESTINATION "${SOCI_INSTALL_INCLUDEDIR}"
     COMPONENT soci_development
 )
 # Generate and install a targets file