CMake: Add support for exported symbols from xlc

Signed-off-by: Devin Nakamura <devinn@ca.ibm.com>

cmake/modules/platform/toolcfg/xlc.cmake

@@ -168,7 +168,12 @@ elseif(OMR_OS_ZOS)
 
 	# Configure the platform dependent library for multithreading
 	set(OMR_PLATFORM_THREAD_LIBRARY "")
+endif()
+
+set(SPP_CMD ${CMAKE_C_COMPILER})
+set(SPP_FLAGS -E -P)
 
+if(OMR_OS_ZOS)
 	function(_omr_toolchain_process_exports TARGET_NAME)
 		# We only need to do something if we are dealing with a shared library
 		get_target_property(target_type ${TARGET_NAME} TYPE)
@@ -181,7 +186,19 @@ elseif(OMR_OS_ZOS)
 				-Wc,DLL,EXPORTALL
 		)
 	endfunction()
-endif()
+else()
+	function(_omr_toolchain_process_exports TARGET_NAME)
+		# we only need to do something if we are dealing with a shared library
+		get_target_property(target_type ${TARGET_NAME} TYPE)
+		if(NOT target_type STREQUAL "SHARED_LIBRARY")
+			return()
+		endif()
 
-set(SPP_CMD ${CMAKE_C_COMPILER})
-set(SPP_FLAGS -E -P)
+		set(exp_file "$<TARGET_PROPERTY:${TARGET_NAME},BINARY_DIR>/${TARGET_NAME}.exp")
+		omr_process_template(
+			"${omr_SOURCE_DIR}/cmake/modules/platform/toolcfg/xlc_exports.exp.in"
+			"${exp_file}"
+		)
+		set_property(TARGET ${TARGET_NAME} APPEND_STRING PROPERTY LINK_FLAGS " -Wl,-bE:${TARGET_NAME}.exp")
+	endfunction()
+endif()

cmake/modules/platform/toolcfg/xlc_exports.exp.in

@@ -0,0 +1,23 @@
+*******************************************************************************
+* Copyright (c) 2019, 2019 IBM Corp. and others
+*
+* This program and the accompanying materials are made available under
+* the terms of the Eclipse Public License 2.0 which accompanies this
+* distribution and is available at http://eclipse.org/legal/epl-2.0
+* or the Apache License, Version 2.0 which accompanies this distribution
+* and is available at https://www.apache.org/licenses/LICENSE-2.0.
+*
+* This Source Code may also be made available under the following Secondary
+* Licenses when the conditions for such availability set forth in the
+* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
+* version 2 with the GNU Classpath Exception [1] and GNU General Public
+* License, version 2 with the OpenJDK Assembly Exception [2].
+*
+* [1] https://www.gnu.org/software/classpath/license.html
+* [2] http://openjdk.java.net/legal/assembly-exception.html
+*
+* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
+*****************************************************************************
+
+$<JOIN:$<TARGET_PROPERTY:@TARGET_NAME@,EXPORTED_SYMBOLS>,
+>