-# Exclude out unit tests from the analysis
-sonar.exclusions=src/*_unit.c,src/*_unit.cpp
-# Exclude the tests that we borrowed elsewhere
-sonar.exclusions=teshsuite/smpi/mpich3-test/*,teshsuite/smpi/isp/*
+# Exclude some files from the analysis:
+# - our unit tests
+# - the tests that we borrowed elsewhere (MPICH and ISP)
+# - Flex-generated files
+sonar.exclusions=src/*_unit.c*,teshsuite/smpi/mpich3-test/*,teshsuite/smpi/isp/*,**/*_dtd.c
+
+# Ignore files that are generated from Flex
+sonar.issue.ignore.allfile=flexGenerated
+sonar.issue.ignore.allfile.flexGenerated.fileRegexp="generated by flex"