1 files changed, 67 insertions, 0 deletions
diff --git a/Tests/RunCMake/GenerateExportHeader/GEH-failures.cmake b/Tests/RunCMake/GenerateExportHeader/GEH-failures.cmake
new file mode 100644
index 0000000..7182cdf
--- /dev/null
+++ b/Tests/RunCMake/GenerateExportHeader/GEH-failures.cmake
@@ -0,0 +1,67 @@
+set(failure_test_executables
+  ${CMAKE_CURRENT_BINARY_DIR}/failure_test_targets)
+file(WRITE ${failure_test_executables} "")
+
+# Check if we should do anything. If the compiler doesn't support hidden
+# visibility, the failure tests won't fail, so just write an empty targets
+# list and punt.
+if(NOT WIN32 AND NOT CYGWIN AND NOT COMPILER_HAS_HIDDEN_VISIBILITY)
+  return()
+endif()
+
+# Read the input source file
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/exportheader_test.cpp content_post)
+set(content_pre "")
+
+# Generate source files for failure test executables
+set(counter 0)
+while(1)
+  # Find first occurrence of link error marker in remaining content
+  string(REGEX MATCH "//([^;\n]+;) LINK ERROR( [(][^)]+[)])?\n(.*)"
+    match "${content_post}")
+  if(match STREQUAL "")
+    # No more matches
+    break()
+  endif()
+
+  # Shift content buffers and extract failing statement
+  string(LENGTH "${content_post}" content_post_length)
+  string(LENGTH "${match}" matched_length)
+  math(EXPR shift_length "${content_post_length} - ${matched_length}")
+
+  string(SUBSTRING "${content_post}" 0 ${shift_length} shift)
+  set(content_pre "${content_pre}${shift}")
+  set(content_post "${CMAKE_MATCH_3}")
+  set(content_active "//${CMAKE_MATCH_1} LINK ERROR${CMAKE_MATCH_2}")
+  set(statement "${CMAKE_MATCH_1}")
+
+  # Check if potential error is conditional, and evaluate condition if so
+  string(REGEX REPLACE " [(]([^)]+)[)]" "\\1" condition "${CMAKE_MATCH_2}")
+  if(NOT condition STREQUAL "")
+    string(REGEX REPLACE " +" ";" condition "${condition}")
+    if(${condition})
+    else()
+      message(STATUS "Not testing '${statement}'; "
+                     "condition (${condition}) is FALSE")
+      set(content_pre "${content_pre}// link error removed\n")
+      continue()
+    endif()
+  endif()
+
+  if(NOT skip)
+    message(STATUS "Creating failure test for '${statement}'")
+    math(EXPR counter "${counter} + 1")
+
+    # Write new source file
+    set(out ${CMAKE_CURRENT_BINARY_DIR}/exportheader_failtest-${counter}.cpp)
+    file(WRITE ${out} "${content_pre}${statement}\n${content_post}")
+
+    # Add executable for failure test
+    add_executable(GEH-fail-${counter} EXCLUDE_FROM_ALL ${out})
+    target_link_libraries(GEH-fail-${counter} ${link_libraries})
+    file(APPEND ${failure_test_executables} "GEH-fail-${counter}\n")
+  endif()
+
+  # Add placeholder where failing statement was removed
+  set(content_pre "${content_pre}${content_active}\n")
+endwhile()