Use relative GNUInstallDirs install destinations

CMakeLists.txt

@@ -21,11 +21,11 @@ set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
 set(THREADS_PREFER_PTHREAD_FLAG TRUE)
 find_package(Threads)
 
+# appbase is built as a wire-sysio component; the superproject's vcpkg
+# toolchain defines the Boost targets (statically linked) before this
+# directory is added. There is intentionally no standalone Boost lookup.
 if(NOT TARGET Boost::program_options)
-  find_package(Boost 1.83 EXACT REQUIRED COMPONENTS program_options system)
-  if(NOT TARGET Boost::program_options)
-    message(FATAL_ERROR "Boost::program_options not found")
-  endif()
+  message(FATAL_ERROR "Boost::program_options target not defined; appbase is built as part of wire-sysio, whose toolchain provides the Boost targets.")
 endif()
 
 if( APPLE )
@@ -90,10 +90,10 @@ endif()
 install( TARGETS
    appbase
 
-   RUNTIME DESTINATION ${CMAKE_INSTALL_FULL_BINDIR} ${INSTALL_COMPONENT_ARGS}
-   LIBRARY DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR} ${INSTALL_COMPONENT_ARGS}
-   ARCHIVE DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR} ${INSTALL_COMPONENT_ARGS}
-   PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR}/appbase ${INSTALL_COMPONENT_ARGS}
+   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} ${INSTALL_COMPONENT_ARGS}
+   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ${INSTALL_COMPONENT_ARGS}
+   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} ${INSTALL_COMPONENT_ARGS}
+   PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/appbase ${INSTALL_COMPONENT_ARGS}
 )
 
 add_subdirectory( examples )

README.md

@@ -11,7 +11,7 @@ plugins are configured, initialized, started, and shutdown in the proper order.
 - Automatically Load Dependent Plugins in Order
 - Plugins can specify commandline arguments and configuration file options
 - Program gracefully exits from SIGINT, SIGTERM, and SIGPIPE
-- Minimal Dependencies (Boost 1.60, c++14)
+- Minimal dependencies (Boost, provided by the superproject's toolchain)
 
 ## Defining a Plugin
 
@@ -113,14 +113,18 @@ all asynchronous operations posted to the io_context should be run in the same t
 
 To trigger a graceful exit call `appbase::app().quit()` or send SIGTERM, SIGINT, or SIGPIPE to the process.
 
-## Dependencies 
+## Building
 
-1. c++14 or newer  (clang or g++)
-2. Boost 1.60 or newer compiled with C++14 support
+appbase is built as a component of
+[wire-sysio](https://github.com/Wire-Network/wire-sysio), which vendors this
+repository as a submodule. The superproject's vcpkg toolchain defines the
+Boost targets (statically linked into the portable wire-sysio binaries,
+currently Boost 1.89) before this directory is configured, so there is
+intentionally **no standalone Boost lookup** here — configuring appbase out
+of tree stops with a clear `FATAL_ERROR`. Install rules use relative
+GNUInstallDirs destinations so the superproject's packaging can stage them
+against its packaging prefix.
 
-To compile boost with c++14 use:
-
-```
-./b2 ...  cxxflags="-std=c++0x -stdlib=libc++" linkflags="-stdlib=libc++" ...
-```
+There is likewise no standalone CI workflow: appbase is compiled and tested
+by wire-sysio CI on every run.