Darwin: Add support for tbd library stub files

Starting with Xcode 7 the OSX and iOS SDKs contain only stub
files for dynamic system libraries. These stub files contain
some meta data and a list of exported sysbols in plain text.

They are handled by the toolchain like regular dylibs.

4 files changed, 27 insertions, 0 deletions

diff --git a/Tests/RunCMake/XcodeProject/RunCMakeTest.cmake b/Tests/RunCMake/XcodeProject/RunCMakeTest.cmake
index ef81739..1151abf 100644
--- a/Tests/RunCMake/XcodeProject/RunCMakeTest.cmake
+++ b/Tests/RunCMake/XcodeProject/RunCMakeTest.cmake
@@ -39,3 +39,9 @@ if(NOT XCODE_VERSION VERSION_LESS 5)
   unset(RunCMake_TEST_NO_CLEAN)
   unset(RunCMake_TEST_OPTIONS)
 endif()
+
+if(NOT XCODE_VERSION VERSION_LESS 7)
+  set(RunCMake_TEST_OPTIONS "-DCMAKE_TOOLCHAIN_FILE=${RunCMake_SOURCE_DIR}/osx.cmake")
+  run_cmake(XcodeTbdStub)
+  unset(RunCMake_TEST_OPTIONS)
+endif()
diff --git a/Tests/RunCMake/XcodeProject/XcodeTbdStub-stdout.txt b/Tests/RunCMake/XcodeProject/XcodeTbdStub-stdout.txt
new file mode 100644
index 0000000..9d9e143
--- /dev/null
+++ b/Tests/RunCMake/XcodeProject/XcodeTbdStub-stdout.txt
@@ -0,0 +1 @@
+.*/libz\.tbd.*
diff --git a/Tests/RunCMake/XcodeProject/XcodeTbdStub.cmake b/Tests/RunCMake/XcodeProject/XcodeTbdStub.cmake
new file mode 100644
index 0000000..e83d7f3
--- /dev/null
+++ b/Tests/RunCMake/XcodeProject/XcodeTbdStub.cmake
@@ -0,0 +1,2 @@
+cmake_minimum_required(VERSION 3.3)
+find_package(ZLIB REQUIRED)
diff --git a/Tests/RunCMake/XcodeProject/osx.cmake b/Tests/RunCMake/XcodeProject/osx.cmake
new file mode 100644
index 0000000..e021fcd
--- /dev/null
+++ b/Tests/RunCMake/XcodeProject/osx.cmake
@@ -0,0 +1,18 @@
+set(CMAKE_SYSTEM_NAME Darwin)
+set(CMAKE_SYSTEM_VERSION 1)
+set(UNIX True)
+set(APPLE True)
+
+find_program(XCRUN_EXECUTABLE xcrun)
+if(NOT XCRUN_EXECUTABLE)
+  message(FATAL_ERROR "xcrun not found")
+endif()
+
+execute_process(
+  COMMAND ${XCRUN_EXECUTABLE} --sdk macosx --show-sdk-path
+  OUTPUT_VARIABLE OSX_SDK_PATH
+  OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+set(CMAKE_OSX_SYSROOT ${OSX_SDK_PATH} CACHE PATH "Sysroot used for OSX support")
+
+set(CMAKE_FIND_ROOT_PATH ${OSX_SDK_PATH} CACHE PATH "Find search path root")