diff --git a/addon/doxywizard/CMakeLists.txt b/addon/doxywizard/CMakeLists.txt
index 99716794126..bf2eda83c6d 100644
--- a/addon/doxywizard/CMakeLists.txt
+++ b/addon/doxywizard/CMakeLists.txt
@@ -76,7 +76,7 @@ OUTPUT ${GENERATED_SRC_WIZARD}/configdoc.cpp
 )
 set_source_files_properties(${GENERATED_SRC_WIZARD}/configdoc.cpp PROPERTIES GENERATED 1)
 
-FLEX_TARGET(config_doxyw config_doxyw.l ${GENERATED_SRC_WIZARD}/config_doxyw.cpp COMPILE_FLAGS "-Pconfig_doxywYY")
+FLEX_TARGET(config_doxyw config_doxyw.l ${GENERATED_SRC_WIZARD}/config_doxyw.cpp COMPILE_FLAGS "$(LEX_FLAGS) -Pconfig_doxywYY")
 
 qt_wrap_cpp(doxywizard_MOC
 doxywizard.h
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index eb030d49d6a..6763cf57792 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -85,26 +85,26 @@ add_custom_command(
 set_source_files_properties(${GENERATED_SRC}/layout_default.xml.h PROPERTIES GENERATED 1)
 
 # Targets for flex/bison   generated files
-FLEX_TARGET(scanner        scanner.l        ${GENERATED_SRC}/scanner.cpp        COMPILE_FLAGS "-PscannerYY")
-FLEX_TARGET(code           code.l           ${GENERATED_SRC}/code.cpp           COMPILE_FLAGS "-PcodeYY")
-FLEX_TARGET(pyscanner      pyscanner.l      ${GENERATED_SRC}/pyscanner.cpp      COMPILE_FLAGS "-PpyscannerYY")
-FLEX_TARGET(pycode         pycode.l         ${GENERATED_SRC}/pycode.cpp         COMPILE_FLAGS "-PpycodeYY")
-FLEX_TARGET(fortranscanner fortranscanner.l ${GENERATED_SRC}/fortranscanner.cpp COMPILE_FLAGS "-PfortranscannerYY -i")
-FLEX_TARGET(fortrancode    fortrancode.l    ${GENERATED_SRC}/fortrancode.cpp    COMPILE_FLAGS "-PfortrancodeYY -i")
-FLEX_TARGET(vhdlcode       vhdlcode.l       ${GENERATED_SRC}/vhdlcode.cpp       COMPILE_FLAGS "-PvhdlcodeYY -i")
-FLEX_TARGET(tclscanner     tclscanner.l     ${GENERATED_SRC}/tclscanner.cpp     COMPILE_FLAGS "-PtclscannerYY -i")
-FLEX_TARGET(pre            pre.l            ${GENERATED_SRC}/pre.cpp            COMPILE_FLAGS "-PpreYY")
-FLEX_TARGET(declinfo       declinfo.l       ${GENERATED_SRC}/declinfo.cpp       COMPILE_FLAGS "-PdeclinfoYY")
-FLEX_TARGET(defargs        defargs.l        ${GENERATED_SRC}/defargs.cpp        COMPILE_FLAGS "-PdefargsYY")
-FLEX_TARGET(doctokenizer   doctokenizer.l   ${GENERATED_SRC}/doctokenizer.cpp   COMPILE_FLAGS "-PdoctokenizerYY")
-FLEX_TARGET(commentcnv     commentcnv.l     ${GENERATED_SRC}/commentcnv.cpp     COMPILE_FLAGS "-PcommentcnvYY")
-FLEX_TARGET(commentscan    commentscan.l    ${GENERATED_SRC}/commentscan.cpp    COMPILE_FLAGS "-PcommentscanYY")
-FLEX_TARGET(constexp       constexp.l       ${GENERATED_SRC}/constexp.cpp       COMPILE_FLAGS "-PconstexpYY")
-FLEX_TARGET(xmlcode        xmlcode.l        ${GENERATED_SRC}/xmlcode.cpp        COMPILE_FLAGS "-PxmlcodeYY")
-FLEX_TARGET(config         config.l         ${GENERATED_SRC}/config.cpp         COMPILE_FLAGS "-PconfigYY")
-
-BISON_TARGET(vhdlparser    vhdlparser.y     ${GENERATED_SRC}/vhdlparser.cpp     COMPILE_FLAGS "-l -p vhdlscannerYY")
-BISON_TARGET(constexp      constexp.y       ${GENERATED_SRC}/ce_parse.cpp       COMPILE_FLAGS "-l -p constexpYY")
+FLEX_TARGET(scanner        scanner.l        ${GENERATED_SRC}/scanner.cpp        COMPILE_FLAGS "$(LEX_FLAGS) -PscannerYY")
+FLEX_TARGET(code           code.l           ${GENERATED_SRC}/code.cpp           COMPILE_FLAGS "$(LEX_FLAGS) -PcodeYY")
+FLEX_TARGET(pyscanner      pyscanner.l      ${GENERATED_SRC}/pyscanner.cpp      COMPILE_FLAGS "$(LEX_FLAGS) -PpyscannerYY")
+FLEX_TARGET(pycode         pycode.l         ${GENERATED_SRC}/pycode.cpp         COMPILE_FLAGS "$(LEX_FLAGS) -PpycodeYY")
+FLEX_TARGET(fortranscanner fortranscanner.l ${GENERATED_SRC}/fortranscanner.cpp COMPILE_FLAGS "$(LEX_FLAGS) -PfortranscannerYY -i")
+FLEX_TARGET(fortrancode    fortrancode.l    ${GENERATED_SRC}/fortrancode.cpp    COMPILE_FLAGS "$(LEX_FLAGS) -PfortrancodeYY -i")
+FLEX_TARGET(vhdlcode       vhdlcode.l       ${GENERATED_SRC}/vhdlcode.cpp       COMPILE_FLAGS "$(LEX_FLAGS) -PvhdlcodeYY -i")
+FLEX_TARGET(tclscanner     tclscanner.l     ${GENERATED_SRC}/tclscanner.cpp     COMPILE_FLAGS "$(LEX_FLAGS) -PtclscannerYY -i")
+FLEX_TARGET(pre            pre.l            ${GENERATED_SRC}/pre.cpp            COMPILE_FLAGS "$(LEX_FLAGS) -PpreYY")
+FLEX_TARGET(declinfo       declinfo.l       ${GENERATED_SRC}/declinfo.cpp       COMPILE_FLAGS "$(LEX_FLAGS) -PdeclinfoYY")
+FLEX_TARGET(defargs        defargs.l        ${GENERATED_SRC}/defargs.cpp        COMPILE_FLAGS "$(LEX_FLAGS) -PdefargsYY")
+FLEX_TARGET(doctokenizer   doctokenizer.l   ${GENERATED_SRC}/doctokenizer.cpp   COMPILE_FLAGS "$(LEX_FLAGS) -PdoctokenizerYY")
+FLEX_TARGET(commentcnv     commentcnv.l     ${GENERATED_SRC}/commentcnv.cpp     COMPILE_FLAGS "$(LEX_FLAGS) -PcommentcnvYY")
+FLEX_TARGET(commentscan    commentscan.l    ${GENERATED_SRC}/commentscan.cpp    COMPILE_FLAGS "$(LEX_FLAGS) -PcommentscanYY")
+FLEX_TARGET(constexp       constexp.l       ${GENERATED_SRC}/constexp.cpp       COMPILE_FLAGS "$(LEX_FLAGS) -PconstexpYY")
+FLEX_TARGET(xmlcode        xmlcode.l        ${GENERATED_SRC}/xmlcode.cpp        COMPILE_FLAGS "$(LEX_FLAGS) -PxmlcodeYY")
+FLEX_TARGET(config         config.l         ${GENERATED_SRC}/config.cpp         COMPILE_FLAGS "$(LEX_FLAGS) -PconfigYY")
+
+BISON_TARGET(vhdlparser    vhdlparser.y     ${GENERATED_SRC}/vhdlparser.cpp     COMPILE_FLAGS "$(YACC_FLAGS) -l -p vhdlscannerYY")
+BISON_TARGET(constexp      constexp.y       ${GENERATED_SRC}/ce_parse.cpp       COMPILE_FLAGS "$(YACC_FLAGS) -l -p constexpYY")
 
 add_library(doxycfg STATIC
     ${GENERATED_SRC}/lang_cfg.h