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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()
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