CMake: Export and install library targets.

The configs can be consumed by setting LibreSSL_DIR to the build
directory, or after installation using CMAKE_PREFIX_PATH/LibreSSL_DIR.

For compatibility, the EXPORT_NAME of targets and the LIBRESSL_*
variables are set to match the names used in FindLibreSSL.

1 files changed, 29 insertions, 3 deletions

diff --git a/ssl/CMakeLists.txt b/ssl/CMakeLists.txt
index 3d5b5df..16ef277 100644
--- a/ssl/CMakeLists.txt
+++ b/ssl/CMakeLists.txt
@@ -91,9 +91,29 @@ if (WIN32)
 endif()
 set_target_properties(ssl PROPERTIES
         OUTPUT_NAME ssl${SSL_POSTFIX}
-        ARCHIVE_OUTPUT_NAME ssl${SSL_POSTFIX})
-set_target_properties(ssl PROPERTIES VERSION ${SSL_VERSION}
-        SOVERSION ${SSL_MAJOR_VERSION})
+        ARCHIVE_OUTPUT_NAME ssl${SSL_POSTFIX}
+        EXPORT_NAME SSL
+        VERSION ${SSL_VERSION}
+        SOVERSION ${SSL_MAJOR_VERSION}
+)
+
+target_include_directories(
+        ssl
+        PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+install(
+        TARGETS ssl
+        EXPORT SSL-target
+)
+
+export(
+        EXPORT SSL-target
+        FILE "${LibreSSL_BINARY_DIR}/LibreSSL-SSL.cmake"
+        NAMESPACE LibreSSL::
+)
 
 if(ENABLE_LIBRESSL_INSTALL)
         install(
@@ -102,6 +122,12 @@ if(ENABLE_LIBRESSL_INSTALL)
                 LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
                 RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
         )
+        install(
+                EXPORT SSL-target
+                FILE "LibreSSL-SSL.cmake"
+                NAMESPACE LibreSSL::
+                DESTINATION "${LIBRESSL_INSTALL_CMAKEDIR}/LibreSSL"
+        )
 endif(ENABLE_LIBRESSL_INSTALL)
 
 # build static library for regression test