m4_cmake_patch.diff

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f0c883..6e1172c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -111,8 +111,8 @@ if(DEFINED ENV{ECE3574_REFERENCE_ENV})
   set(GCC_COVERAGE_COMPILE_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
   set_target_properties(interpreter PROPERTIES COMPILE_FLAGS ${GCC_COVERAGE_COMPILE_FLAGS} )
   set_target_properties(unit_tests PROPERTIES COMPILE_FLAGS ${GCC_COVERAGE_COMPILE_FLAGS} )
-  target_link_libraries(unit_tests interpreter gcov)
-  target_link_libraries(plotscript interpreter gcov)
+  target_link_libraries(unit_tests interpreter pthread gcov)
+  target_link_libraries(plotscript interpreter pthread gcov)
   add_custom_target(coverage
     COMMAND ${CMAKE_COMMAND} -E env "ROOT=${CMAKE_CURRENT_SOURCE_DIR}"
     ${CMAKE_CURRENT_SOURCE_DIR}/scripts/coverage.sh)