Doxygen / Discussion / doxygen-users: Processing variables present in an included header file (FORTRAN)

Hi all,

I have a mature FORTRAN code which I would like to modernise and as part of this process incorporate DOXYGEN comments throughout. The code contains header files which contain lists of variables (and previously common blocks) that could then be included in subroutines where access to these variables are required. Regardless of what I do, I can not get DOXYGEN (1.8.13) to process these files. I have written a simpler example involving three files below to show what I mean:

MODULE.f

!> @brief An example of a module with global variables defined
!> @details The purpose is to explain why the global variables in group VARGROUP2 in the included file do not appear in the DOXYGEN ouptut.
!> @details Why? Please help! I can not see where I have made a mistake
      MODULE EXAMPLE
      INTEGER N
      PARAMETRER(N=10)

!> @name VARGROUP1
!! Parameters in group 1
!> @{ 
      DOUBLE PRECISION GR1_GLOBAL1                 !< Example of a global variable
      DOUBLE PRECISION GR1_GLOBAL2                 !< Another example of a global variable
      DOUBLE PRECISION GR1_VECTOR(N)               !< An example of a global vector variable
!> @}
#include "VARIABLES.h"
!> @name VARGROUP3
!! Parameters in group 3
!> @{ 
      DOUBLE PRECISION GR3_GLOBAL1                 !< Example of a global variable
      DOUBLE PRECISION GR3_GLOBAL2                 !< Another example of a global variable
!> @}

      CONTAINS
!> @brief An example of a subroutine within a module
!> @details A simple Hello World Program
      SUBROUTINE EXSUB
      INTEGER I                                    !< Example of a local variable
      I = 0
      GR1_GLOBAL1 = 0
      GR2_GLOBAL1 = 0
      WRITE(*,*) 'HELLO WORLD'
      WRITE(*,*) I,GR1_GLOBAL1,GR2_GLOBAL1
      END SUBROUTINE EXSUB
      END MODULE EXAMPLE

The included header file (VARIABLES.h):

!> @name VARGROUP2
!! Parameters in group 2
!> @{ 
      DOUBLE PRECISION GR2_GLOBAL1                 !< Example of a global variable
      DOUBLE PRECISION GR2_GLOBAL2                 !< Another example of a global variable
!> @}

And for completeness, the FORTRAN program which makes use of this module (PROG.f):

      PROGRAM PROG
      USE EXAMPLE
      CALL EXSUB
      END

When I try to doxygen this, the HTML output successfully shows VARGROUP1 and VARGROUP3. However, VARGROUP2 (as defined in the VARIABLES.h file) are not present. I have tried many options in DOXYGEN such as 'FORCE_LOCAL_INCLUDES', 'ENABLE_PREPROESSING', 'MACRO_EXPANSION' and 'SEARCH_INCLUDES'.

Any help you can offer would be much appreciated.

Good suggestion Paul. I think I am requesting doxygen to process the .h files (see extension mapping and/or list of file types in 'FILE_PATTERNS' below.

For completeness, this is the configuration generated by doxywizrd:

# Doxyfile 1.8.13

#---------------------------------------------------------------------------
# Project related configuration options
#---------------------------------------------------------------------------
DOXYFILE_ENCODING      = UTF-8
PROJECT_NAME           = "Example which does not work"
PROJECT_NUMBER         = 
PROJECT_BRIEF          = 
PROJECT_LOGO           = 
OUTPUT_DIRECTORY       = /home/USER/SCRATCH/OFFICIAL_CHANGE/TEST/doxytest/OUTPUT
CREATE_SUBDIRS         = NO
ALLOW_UNICODE_NAMES    = NO
OUTPUT_LANGUAGE        = English
BRIEF_MEMBER_DESC      = YES
REPEAT_BRIEF           = YES
ABBREVIATE_BRIEF       = "The $name class" \
                         "The $name widget" \
                         "The $name file" \
                         is \
                         provides \
                         specifies \
                         contains \
                         represents \
                         a \
                         an \
                         the
ALWAYS_DETAILED_SEC    = NO
INLINE_INHERITED_MEMB  = NO
FULL_PATH_NAMES        = YES
STRIP_FROM_PATH        = 
STRIP_FROM_INC_PATH    = 
SHORT_NAMES            = NO
JAVADOC_AUTOBRIEF      = NO
QT_AUTOBRIEF           = NO
MULTILINE_CPP_IS_BRIEF = NO
INHERIT_DOCS           = YES
SEPARATE_MEMBER_PAGES  = NO
TAB_SIZE               = 4
ALIASES                = 
TCL_SUBST              = 
OPTIMIZE_OUTPUT_FOR_C  = NO
OPTIMIZE_OUTPUT_JAVA   = NO
OPTIMIZE_FOR_FORTRAN   = YES
OPTIMIZE_OUTPUT_VHDL   = NO
EXTENSION_MAPPING      = "EXTENSION_MAPPING= .h=fortran"
MARKDOWN_SUPPORT       = YES
TOC_INCLUDE_HEADINGS   = 0
AUTOLINK_SUPPORT       = YES
BUILTIN_STL_SUPPORT    = NO
CPP_CLI_SUPPORT        = NO
SIP_SUPPORT            = NO
IDL_PROPERTY_SUPPORT   = YES
DISTRIBUTE_GROUP_DOC   = NO
GROUP_NESTED_COMPOUNDS = NO
SUBGROUPING            = YES
INLINE_GROUPED_CLASSES = NO
INLINE_SIMPLE_STRUCTS  = NO
TYPEDEF_HIDES_STRUCT   = NO
LOOKUP_CACHE_SIZE      = 0
#---------------------------------------------------------------------------
# Build related configuration options
#---------------------------------------------------------------------------
EXTRACT_ALL            = YES
EXTRACT_PRIVATE        = YES
EXTRACT_PACKAGE        = YES
EXTRACT_STATIC         = YES
EXTRACT_LOCAL_CLASSES  = YES
EXTRACT_LOCAL_METHODS  = YES
EXTRACT_ANON_NSPACES   = YES
HIDE_UNDOC_MEMBERS     = NO
HIDE_UNDOC_CLASSES     = NO
HIDE_FRIEND_COMPOUNDS  = NO
HIDE_IN_BODY_DOCS      = NO
INTERNAL_DOCS          = YES
CASE_SENSE_NAMES       = YES
HIDE_SCOPE_NAMES       = NO
HIDE_COMPOUND_REFERENCE= NO
SHOW_INCLUDE_FILES     = YES
SHOW_GROUPED_MEMB_INC  = YES
FORCE_LOCAL_INCLUDES   = YES
INLINE_INFO            = YES
SORT_MEMBER_DOCS       = YES
SORT_BRIEF_DOCS        = YES
SORT_MEMBERS_CTORS_1ST = YES
SORT_GROUP_NAMES       = YES
SORT_BY_SCOPE_NAME     = YES
STRICT_PROTO_MATCHING  = NO
GENERATE_TODOLIST      = YES
GENERATE_TESTLIST      = YES
GENERATE_BUGLIST       = YES
GENERATE_DEPRECATEDLIST= YES
ENABLED_SECTIONS       = 
MAX_INITIALIZER_LINES  = 30
SHOW_USED_FILES        = YES
SHOW_FILES             = YES
SHOW_NAMESPACES        = YES
FILE_VERSION_FILTER    = 
LAYOUT_FILE            = 
CITE_BIB_FILES         = 
#---------------------------------------------------------------------------
# Configuration options related to warning and progress messages
#---------------------------------------------------------------------------
QUIET                  = NO
WARNINGS               = YES
WARN_IF_UNDOCUMENTED   = YES
WARN_IF_DOC_ERROR      = YES
WARN_NO_PARAMDOC       = NO
WARN_AS_ERROR          = NO
WARN_FORMAT            = "$file:$line: $text"
WARN_LOGFILE           = 
#---------------------------------------------------------------------------
# Configuration options related to the input files
#---------------------------------------------------------------------------
INPUT                  = /home/USER/SCRATCH/OFFICIAL_CHANGE/TEST/doxytest
INPUT_ENCODING         = UTF-8
FILE_PATTERNS          = *.c \
                         *.cc \
                         *.cxx \
                         *.cpp \
                         *.c++ \
                         *.java \
                         *.ii \
                         *.ixx \
                         *.ipp \
                         *.i++ \
                         *.inl \
                         *.idl \
                         *.ddl \
                         *.odl \
                         *.h \
                         *.hh \
                         *.hxx \
                         *.hpp \
                         *.h++ \
                         *.cs \
                         *.d \
                         *.php \
                         *.php4 \
                         *.php5 \
                         *.phtml \
                         *.inc \
                         *.m \
                         *.markdown \
                         *.md \
                         *.mm \
                         *.dox \
                         *.py \
                         *.pyw \
                         *.f90 \
                         *.f95 \
                         *.f03 \
                         *.f08 \
                         *.f \
                         *.for \
                         *.tcl \
                         *.vhd \
                         *.vhdl \
                         *.ucf \
                         *.qsf
RECURSIVE              = YES
EXCLUDE                = 
EXCLUDE_SYMLINKS       = NO
EXCLUDE_PATTERNS       = 
EXCLUDE_SYMBOLS        = 
EXAMPLE_PATH           = 
EXAMPLE_PATTERNS       = *
EXAMPLE_RECURSIVE      = NO
IMAGE_PATH             = 
INPUT_FILTER           = 
FILTER_PATTERNS        = 
FILTER_SOURCE_FILES    = NO
FILTER_SOURCE_PATTERNS = 
USE_MDFILE_AS_MAINPAGE = 
#---------------------------------------------------------------------------
# Configuration options related to source browsing
#---------------------------------------------------------------------------
SOURCE_BROWSER         = YES
INLINE_SOURCES         = YES
STRIP_CODE_COMMENTS    = YES
REFERENCED_BY_RELATION = YES
REFERENCES_RELATION    = YES
REFERENCES_LINK_SOURCE = YES
SOURCE_TOOLTIPS        = YES
USE_HTAGS              = YES
VERBATIM_HEADERS       = YES
CLANG_ASSISTED_PARSING = NO
CLANG_OPTIONS          = 
#---------------------------------------------------------------------------
# Configuration options related to the alphabetical class index
#---------------------------------------------------------------------------
ALPHABETICAL_INDEX     = YES
COLS_IN_ALPHA_INDEX    = 5
IGNORE_PREFIX          = 
#---------------------------------------------------------------------------
# Configuration options related to the HTML output
#---------------------------------------------------------------------------
GENERATE_HTML          = YES
HTML_OUTPUT            = html
HTML_FILE_EXTENSION    = .html
HTML_HEADER            = 
HTML_FOOTER            = 
HTML_STYLESHEET        = 
HTML_EXTRA_STYLESHEET  = 
HTML_EXTRA_FILES       = 
HTML_COLORSTYLE_HUE    = 220
HTML_COLORSTYLE_SAT    = 100
HTML_COLORSTYLE_GAMMA  = 80
HTML_TIMESTAMP         = NO
HTML_DYNAMIC_SECTIONS  = NO
HTML_INDEX_NUM_ENTRIES = 100
GENERATE_DOCSET        = NO
DOCSET_FEEDNAME        = "Doxygen generated docs"
DOCSET_BUNDLE_ID       = org.doxygen.Project
DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
DOCSET_PUBLISHER_NAME  = Publisher
GENERATE_HTMLHELP      = NO
CHM_FILE               = 
HHC_LOCATION           = 
GENERATE_CHI           = NO
CHM_INDEX_ENCODING     = 
BINARY_TOC             = NO
TOC_EXPAND             = NO
GENERATE_QHP           = NO
QCH_FILE               = 
QHP_NAMESPACE          = org.doxygen.Project
QHP_VIRTUAL_FOLDER     = doc
QHP_CUST_FILTER_NAME   = 
QHP_CUST_FILTER_ATTRS  = 
QHP_SECT_FILTER_ATTRS  = 
QHG_LOCATION           = 
GENERATE_ECLIPSEHELP   = NO
ECLIPSE_DOC_ID         = org.doxygen.Project
DISABLE_INDEX          = NO
GENERATE_TREEVIEW      = NO
ENUM_VALUES_PER_LINE   = 4
TREEVIEW_WIDTH         = 250
EXT_LINKS_IN_WINDOW    = NO
FORMULA_FONTSIZE       = 10
FORMULA_TRANSPARENT    = YES
USE_MATHJAX            = NO
MATHJAX_FORMAT         = HTML-CSS
MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
MATHJAX_EXTENSIONS     = 
MATHJAX_CODEFILE       = 
SEARCHENGINE           = YES
SERVER_BASED_SEARCH    = NO
EXTERNAL_SEARCH        = NO
SEARCHENGINE_URL       = 
SEARCHDATA_FILE        = searchdata.xml
EXTERNAL_SEARCH_ID     = 
EXTRA_SEARCH_MAPPINGS  = 
#---------------------------------------------------------------------------
# Configuration options related to the LaTeX output
#---------------------------------------------------------------------------
GENERATE_LATEX         = YES
LATEX_OUTPUT           = latex
LATEX_CMD_NAME         = latex
MAKEINDEX_CMD_NAME     = makeindex
COMPACT_LATEX          = NO
PAPER_TYPE             = a4
EXTRA_PACKAGES         = 
LATEX_HEADER           = 
LATEX_FOOTER           = 
LATEX_EXTRA_STYLESHEET = 
LATEX_EXTRA_FILES      = 
PDF_HYPERLINKS         = YES
USE_PDFLATEX           = YES
LATEX_BATCHMODE        = NO
LATEX_HIDE_INDICES     = NO
LATEX_SOURCE_CODE      = NO
LATEX_BIB_STYLE        = plain
LATEX_TIMESTAMP        = NO
#---------------------------------------------------------------------------
# Configuration options related to the RTF output
#---------------------------------------------------------------------------
GENERATE_RTF           = NO
RTF_OUTPUT             = rtf
COMPACT_RTF            = NO
RTF_HYPERLINKS         = NO
RTF_STYLESHEET_FILE    = 
RTF_EXTENSIONS_FILE    = 
RTF_SOURCE_CODE        = NO
#---------------------------------------------------------------------------
# Configuration options related to the man page output
#---------------------------------------------------------------------------
GENERATE_MAN           = NO
MAN_OUTPUT             = man
MAN_EXTENSION          = .3
MAN_SUBDIR             = 
MAN_LINKS              = NO
#---------------------------------------------------------------------------
# Configuration options related to the XML output
#---------------------------------------------------------------------------
GENERATE_XML           = NO
XML_OUTPUT             = xml
XML_PROGRAMLISTING     = YES
#---------------------------------------------------------------------------
# Configuration options related to the DOCBOOK output
#---------------------------------------------------------------------------
GENERATE_DOCBOOK       = NO
DOCBOOK_OUTPUT         = docbook
DOCBOOK_PROGRAMLISTING = NO
#---------------------------------------------------------------------------
# Configuration options for the AutoGen Definitions output
#---------------------------------------------------------------------------
GENERATE_AUTOGEN_DEF   = NO
#---------------------------------------------------------------------------
# Configuration options related to the Perl module output
#---------------------------------------------------------------------------
GENERATE_PERLMOD       = NO
PERLMOD_LATEX          = NO
PERLMOD_PRETTY         = YES
PERLMOD_MAKEVAR_PREFIX = 
#---------------------------------------------------------------------------
# Configuration options related to the preprocessor
#---------------------------------------------------------------------------
ENABLE_PREPROCESSING   = YES
MACRO_EXPANSION        = YES
EXPAND_ONLY_PREDEF     = NO
SEARCH_INCLUDES        = YES
INCLUDE_PATH           = 
INCLUDE_FILE_PATTERNS  = 
PREDEFINED             = 
EXPAND_AS_DEFINED      = 
SKIP_FUNCTION_MACROS   = YES
#---------------------------------------------------------------------------
# Configuration options related to external references
#---------------------------------------------------------------------------
TAGFILES               = 
GENERATE_TAGFILE       = 
ALLEXTERNALS           = NO
EXTERNAL_GROUPS        = YES
EXTERNAL_PAGES         = YES
PERL_PATH              = /usr/bin/perl
#---------------------------------------------------------------------------
# Configuration options related to the dot tool
#---------------------------------------------------------------------------
CLASS_DIAGRAMS         = NO
MSCGEN_PATH            = 
DIA_PATH               = 
HIDE_UNDOC_RELATIONS   = YES
HAVE_DOT               = YES
DOT_NUM_THREADS        = 0
DOT_FONTNAME           = Helvetica
DOT_FONTSIZE           = 10
DOT_FONTPATH           = 
CLASS_GRAPH            = YES
COLLABORATION_GRAPH    = YES
GROUP_GRAPHS           = YES
UML_LOOK               = NO
UML_LIMIT_NUM_FIELDS   = 10
TEMPLATE_RELATIONS     = NO
INCLUDE_GRAPH          = YES
INCLUDED_BY_GRAPH      = YES
CALL_GRAPH             = NO
CALLER_GRAPH           = NO
GRAPHICAL_HIERARCHY    = YES
DIRECTORY_GRAPH        = YES
DOT_IMAGE_FORMAT       = png
INTERACTIVE_SVG        = NO
DOT_PATH               = 
DOTFILE_DIRS           = 
MSCFILE_DIRS           = 
DIAFILE_DIRS           = 
PLANTUML_JAR_PATH      = 
PLANTUML_CFG_FILE      = 
PLANTUML_INCLUDE_PATH  = 
DOT_GRAPH_MAX_NODES    = 50
MAX_DOT_GRAPH_DEPTH    = 0
DOT_TRANSPARENT        = NO
DOT_MULTI_TARGETS      = NO
GENERATE_LEGEND        = YES
DOT_CLEANUP            = YES

Last edit: Robert Gregg 2020-06-26

Processing variables present in an included header file (FORTRAN)

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Processing variables present in an included header file (FORTRAN)

Processing variables present in an included header file (FORTRAN)

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Processing variables present in an included header file (FORTRAN)