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.

CMakeLists.txt

@@ -39,6 +39,7 @@ option(ENABLE_ASM "Enable assembly" ON)
 option(ENABLE_EXTRATESTS "Enable extra tests that may be unreliable on some platforms" OFF)
 option(ENABLE_NC "Enable installing TLS-enabled nc(1)" OFF)
 set(OPENSSLDIR ${OPENSSLDIR} CACHE PATH "Set the default openssl directory" FORCE)
+set(LIBRESSL_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake" CACHE STRING "Installation directory for the CMake targets")
 
 option(USE_STATIC_MSVC_RUNTIMES "Use /MT instead of /MD in MSVC" OFF)
 if(USE_STATIC_MSVC_RUNTIMES)
@@ -439,6 +440,38 @@ if (BUILD_APPLE_XCFRAMEWORK)
 	endif(ENABLE_LIBRESSL_INSTALL)
 endif(BUILD_APPLE_XCFRAMEWORK)
 
+file(STRINGS "VERSION" VERSION LIMIT_COUNT 1)
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+	"LibreSSLConfigVersion.cmake"
+	VERSION "${VERSION}"
+	COMPATIBILITY SameMajorVersion
+)
+
+set(INCLUDE_DIRECTORY "${CMAKE_BINARY_DIR}/include")
+configure_package_config_file(
+  "${CMAKE_CURRENT_LIST_DIR}/LibreSSLConfig.cmake.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/LibreSSLConfig.cmake"
+	PATH_VARS INCLUDE_DIRECTORY
+  INSTALL_DESTINATION "${CMAKE_CURRENT_BINARY_DIR}"
+	INSTALL_PREFIX "${CMAKE_CURRENT_BINARY_DIR}"
+)
+
+if(ENABLE_LIBRESSL_INSTALL)
+	set(INCLUDE_DIRECTORY "${CMAKE_INSTALL_INCLUDEDIR}")
+	configure_package_config_file(
+  	"${CMAKE_CURRENT_LIST_DIR}/LibreSSLConfig.cmake.in"
+  	"${CMAKE_CURRENT_BINARY_DIR}/install-config/LibreSSLConfig.cmake"
+		PATH_VARS INCLUDE_DIRECTORY
+  	INSTALL_DESTINATION "${LIBRESSL_INSTALL_CMAKEDIR}/LibreSSL"
+	)
+	install(FILES
+		"${CMAKE_BINARY_DIR}/install-config/LibreSSLConfig.cmake"
+		"${CMAKE_BINARY_DIR}/LibreSSLConfigVersion.cmake"
+		DESTINATION "${LIBRESSL_INSTALL_CMAKEDIR}/LibreSSL"
+	)
+endif()
+
 if(ENABLE_LIBRESSL_INSTALL)
 	if(NOT MSVC)
 		# Create pkgconfig files.
@@ -449,7 +482,6 @@ if(ENABLE_LIBRESSL_INSTALL)
 		if(PLATFORM_LIBS)
 			string(REGEX REPLACE ";" " -l" PLATFORM_LDADD ";${PLATFORM_LIBS}")
 		endif()
-		file(STRINGS    "VERSION" VERSION LIMIT_COUNT 1)
 		file(GLOB       OPENSSL_PKGCONFIGS "*.pc.in")
 		foreach(file ${OPENSSL_PKGCONFIGS})
 			get_filename_component(filename ${file} NAME)

LibreSSLConfig.cmake.in

@@ -0,0 +1,33 @@
+@PACKAGE_INIT@
+
+set(LIBRESSL_VERSION @VERSION@)
+set_and_check(LIBRESSL_INCLUDE_DIR @PACKAGE_INCLUDE_DIRECTORY@)
+
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/LibreSSL-Crypto.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/LibreSSL-Crypto.cmake")
+  set(LIBRESSL_CRYPTO_LIBRARY LibreSSL::Crypto)
+endif()
+
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/LibreSSL-SSL.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/LibreSSL-SSL.cmake")
+  set(LIBRESSL_SSL_LIBRARY LibreSSL::SSL)
+endif()
+
+if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/LibreSSL-TLS.cmake")
+  include("${CMAKE_CURRENT_LIST_DIR}/LibreSSL-TLS.cmake")
+  set(LIBRESSL_TLS_LIBRARY LibreSSL::TLS)
+endif()
+
+set(LIBRESSL_LIBRARIES
+  ${LIBRESSL_CRYPTO_LIBRARY}
+  ${LIBRESSL_SSL_LIBRARY}
+  ${LIBRESSL_TLS_LIBRARY}
+)
+
+check_required_components(
+  Crypto
+  SSL
+  TLS
+)
+
+set(LIBRESSL_FOUND TRUE)

Makefile.am

@@ -11,7 +11,7 @@ pkgconfig_DATA += libcrypto.pc libssl.pc openssl.pc
 endif
 
 EXTRA_DIST = README.md README.windows VERSION config scripts
-EXTRA_DIST += CMakeLists.txt cmake_export_symbol.cmake cmake_uninstall.cmake.in FindLibreSSL.cmake
+EXTRA_DIST += CMakeLists.txt cmake_export_symbol.cmake cmake_uninstall.cmake.in FindLibreSSL.cmake LibreSSLConfig.cmake.in
 EXTRA_DIST += cert.pem openssl.cnf x509v3.cnf
 
 .PHONY: install_sw

crypto/CMakeLists.txt

@@ -990,9 +990,29 @@ if (WIN32)
 endif()
 set_target_properties(crypto PROPERTIES
 	OUTPUT_NAME crypto${CRYPTO_POSTFIX}
-	ARCHIVE_OUTPUT_NAME crypto${CRYPTO_POSTFIX})
+	ARCHIVE_OUTPUT_NAME crypto${CRYPTO_POSTFIX}
-set_target_properties(crypto PROPERTIES VERSION
+	EXPORT_NAME Crypto
-	${CRYPTO_VERSION} SOVERSION ${CRYPTO_MAJOR_VERSION})
+	VERSION ${CRYPTO_VERSION}
+	SOVERSION ${CRYPTO_MAJOR_VERSION}
+)
+
+target_include_directories(
+	crypto
+	PUBLIC
+	$<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>
+	$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+install(
+	TARGETS crypto
+	EXPORT Crypto-target
+)
+
+export(
+	EXPORT Crypto-target
+	FILE "${LibreSSL_BINARY_DIR}/LibreSSL-Crypto.cmake"
+	NAMESPACE LibreSSL::
+)
 
 if(ENABLE_LIBRESSL_INSTALL)
 	install(
@@ -1001,6 +1021,12 @@ if(ENABLE_LIBRESSL_INSTALL)
 		LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 		RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 	)
+	install(
+		EXPORT Crypto-target
+		FILE "LibreSSL-Crypto.cmake"
+		NAMESPACE LibreSSL::
+		DESTINATION "${LIBRESSL_INSTALL_CMAKEDIR}/LibreSSL"
+	)
 endif(ENABLE_LIBRESSL_INSTALL)
 
 # build static library for regression test

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})
+	ARCHIVE_OUTPUT_NAME ssl${SSL_POSTFIX}
-set_target_properties(ssl PROPERTIES VERSION ${SSL_VERSION}
+	EXPORT_NAME SSL
-	SOVERSION ${SSL_MAJOR_VERSION})
+	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

tls/CMakeLists.txt

@@ -58,9 +58,29 @@ if (WIN32)
 endif()
 set_target_properties(tls PROPERTIES
 	OUTPUT_NAME tls${TLS_POSTFIX}
-	ARCHIVE_OUTPUT_NAME tls${TLS_POSTFIX})
+	ARCHIVE_OUTPUT_NAME tls${TLS_POSTFIX}
-set_target_properties(tls PROPERTIES VERSION ${TLS_VERSION}
+	EXPORT_NAME TLS
-	SOVERSION ${TLS_MAJOR_VERSION})
+	VERSION ${TLS_VERSION}
+	SOVERSION ${TLS_MAJOR_VERSION}
+)
+
+target_include_directories(
+	tls
+	PUBLIC
+	$<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>
+	$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+install(
+	TARGETS tls
+	EXPORT TLS-target
+)
+
+export(
+	EXPORT TLS-target
+	FILE "${LibreSSL_BINARY_DIR}/LibreSSL-TLS.cmake"
+	NAMESPACE LibreSSL::
+)
 
 if(ENABLE_LIBRESSL_INSTALL)
 	install(
@@ -69,6 +89,12 @@ if(ENABLE_LIBRESSL_INSTALL)
 		LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 		RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 	)
+	install(
+		EXPORT TLS-target
+		FILE "LibreSSL-TLS.cmake"
+		NAMESPACE LibreSSL::
+		DESTINATION "${LIBRESSL_INSTALL_CMAKEDIR}/LibreSSL"
+	)
 endif(ENABLE_LIBRESSL_INSTALL)
 
 # build static library for regression test