Squashed commit of the following:

commit b40b2ac
Author: David Seifert <soap@gentoo.org>
Date:   Sun Jun 16 21:28:25 2019 +0200

    Add missing EOL

commit c9e4356
Author: David Seifert <soap@gentoo.org>
Date:   Sun Jun 16 21:28:22 2019 +0200

    Install pkg-config file

commit eb03050
Author: David Seifert <soap@gentoo.org>
Date:   Sun Jun 16 21:28:19 2019 +0200

    Version library

commit ae3e7f7
Author: David Seifert <soap@gentoo.org>
Date:   Sun Jun 16 21:28:16 2019 +0200

    Fix man installation path to honour GNUInstallDirs

CMakeLists.txt

@@ -23,6 +23,10 @@ else ()
 endif ()
 
 add_library(libtelnet libtelnet.c)
+set_target_properties(libtelnet
+  PROPERTIES
+  VERSION ${PROJECT_VERSION}
+  SOVERSION 2)
 
 target_include_directories(libtelnet
     PUBLIC
@@ -59,5 +63,8 @@ install(EXPORT libtelnet-export
     FILE libtelnet.cmake
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libtelnet
 )
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libtelnet.pc
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
+)
 
-include(CPack)
+include(CPack)

doc/man/CMakeLists.txt

@@ -1,2 +1,2 @@
 add_subdirectory(man1)
-add_subdirectory(man3)
+add_subdirectory(man3)

doc/man/man1/CMakeLists.txt

@@ -1,4 +1,4 @@
 install(
     FILES telnet-chatd.1 telnet-client.1 telnet-proxy.1
-    DESTINATION ${CMAKE_INSTALL_PREFIX}/man/man1
-)
+    DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
+)

doc/man/man3/CMakeLists.txt

@@ -14,5 +14,5 @@ install(
         ${CMAKE_CURRENT_BINARY_DIR}/telnet_event_t_zmp_t.3
         ${CMAKE_CURRENT_BINARY_DIR}/telnet_event_t_mssp_t.3
         ${CMAKE_CURRENT_BINARY_DIR}/telnet_telopt_t.3
-    DESTINATION ${CMAKE_INSTALL_PREFIX}/man/man3
-)
+    DESTINATION ${CMAKE_INSTALL_MANDIR}/man3
+)

test/CMakeLists.txt

@@ -4,4 +4,4 @@ foreach (test_name environ01 environ02 environ03 exopl01 exopl02 mssp01 rfc1143
     add_test(
         NAME ${test_name}
         COMMAND telnet-test ${CMAKE_CURRENT_SOURCE_DIR}/${test_name}.input ${CMAKE_CURRENT_SOURCE_DIR}/${test_name}.txt)
-endforeach ()
+endforeach ()