cmake: add install targets and pkg-config support

Add CMake install() directives for the shared library and public header
and introduce a canvenient.pc.in template to generate a pkg-config file
at build time. The pkg-config file is installed to the multiarch
pkgconfig directory.

Signed-off-by: Christopher Obbard <obbardc@debian.org>

Author: obbardc

CMakeLists.txt

@@ -61,3 +61,23 @@ endif()
 include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/include
 )
+
+include(GNUInstallDirs)
+
+install(TARGETS ${PROJECT_NAME}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+
+install(FILES include/CANvenient.h
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)
+
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/canvenient.pc.in
+  ${CMAKE_CURRENT_BINARY_DIR}/canvenient.pc
+  @ONLY
+)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/canvenient.pc
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
+)

canvenient.pc.in

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+
+Name: CANvenient
+Description: CAN library with multiple driver backends
+Version: @PROJECT_VERSION@
+Libs: -L${libdir} -lCANvenient
+Libs.private: -lsocketcan
+Cflags: -I${includedir}