Tests: Add test for install(TARGETS) RPATH functionality

Tests/RunCMake/install/RunCMakeTest.cmake

@@ -88,6 +88,7 @@ run_install_test(TARGETS-CONFIGURATIONS)
 run_install_test(DIRECTORY-PATTERN)
 run_install_test(TARGETS-Parts)
 run_install_test(FILES-PERMISSIONS)
+run_install_test(TARGETS-RPATH)
 
 set(run_install_test_components 1)
 run_install_test(FILES-EXCLUDE_FROM_ALL)

Tests/RunCMake/install/TARGETS-RPATH-all-check.cmake

@@ -0,0 +1,14 @@
+execute_process(
+  COMMAND "${CMAKE_INSTALL_PREFIX}/bin/myexe"
+  RESULT_VARIABLE MYEXE_RESULT
+  OUTPUT_VARIABLE MYEXE_OUTPUT
+  ERROR_VARIABLE MYEXE_ERROR
+  )
+
+if(NOT MYEXE_RESULT EQUAL "0")
+  set(RunCMake_TEST_FAILED "myexe returned [${MYEXE_RESULT}], was expecting [0]")
+elseif(NOT MYEXE_OUTPUT STREQUAL "")
+  set(RunCMake_TEST_FAILED "myexe printed nonempty output:\n${MYEXE_OUTPUT}")
+elseif(NOT MYEXE_ERROR STREQUAL "")
+  set(RunCMake_TEST_FAILED "myexe printed nonempty error:\n${MYEXE_ERROR}")
+endif()

Tests/RunCMake/install/TARGETS-RPATH.cmake

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.9)
+
+enable_language(C)
+
+set(CMAKE_BUILD_WITH_INSTALL_RPATH 1)
+add_library(mylib SHARED obj1.c)
+add_executable(myexe testobj1.c)
+target_link_libraries(myexe mylib)
+set_property(TARGET myexe PROPERTY INSTALL_RPATH "${CMAKE_CURRENT_BINARY_DIR}/root-all/bin")
+set_target_properties(mylib PROPERTIES VERSION 1.0 SOVERSION 1)
+
+install(TARGETS mylib myexe
+  DESTINATION bin
+  )

Tests/RunCMake/install/obj1.c

@@ -1,4 +1,7 @@
-int obj1(void)
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+  int obj1(void)
 {
   return 0;
 }

Tests/RunCMake/install/testobj1.c

@@ -0,0 +1,9 @@
+#ifdef _WIN32
+__declspec(dllimport)
+#endif
+  int obj1(void);
+
+int main(void)
+{
+  return obj1();
+}