$NetBSD: patch-CMakeLists.txt,v 1.1 2020/05/05 17:54:39 adam Exp $

Set shared library version.
Prepare and install pkgconfig file.
Install crypto_types.h.

--- CMakeLists.txt.orig	2019-12-23 09:58:25.000000000 +0000
+++ CMakeLists.txt
@@ -2,7 +2,9 @@ cmake_minimum_required(VERSION 2.8)
 
 project(libsrtp2 LANGUAGES C)
 
+set(PACKAGE_NAME "${CMAKE_PROJECT_NAME}")
 set(PACKAGE_VERSION 2.3.0)
+set(PACKAGE_SOVERSION 2)
 set(PACKAGE_STRING "${CMAKE_PROJECT_NAME} ${PACKAGE_VERSION}")
 
 include(TestBigEndian)
@@ -184,10 +186,20 @@ if(WIN32)
   target_link_libraries(srtp2 ws2_32)
 endif()
 
+set(prefix "${CMAKE_INSTALL_PREFIX}")
+set(libdir "\${exec_prefix}/lib")
+set(includedir "\${prefix}/include")
+configure_file(libsrtp2.pc.in libsrtp2.pc @ONLY)
+install(FILES libsrtp2.pc DESTINATION lib/pkgconfig)
+
+set_target_properties(srtp2 PROPERTIES
+    VERSION ${PACKAGE_VERSION} SOVERSION ${PACKAGE_SOVERSION})
+
 install(TARGETS srtp2 DESTINATION lib)
 install(FILES include/srtp.h crypto/include/auth.h
   crypto/include/cipher.h
   crypto/include/cipher_types.h
+  crypto/include/crypto_types.h
   DESTINATION include/srtp2)
 
 if(TEST_APPS)