Add test project for 2stage case

.gitlab-ci.yml

@@ -3426,6 +3426,32 @@ distcheck:
     # stupid 'make distcheck' leaves behind write-protected files that the stupid gitlab runner cannot remove
     - make distcheck DISTCHECK_CONFIGURE_FLAGS="--with-mpi=no --disable-sse-assembly --disable-sse --disable-avx --disable-avx2" TASKS=2 TEST_FLAGS='150 50 16' || { chmod u+rwX -R . ; exit 1 ; }
 
+# test test_project
+test_project:
+  tags:
+    - buildtest
+  script:
+    - mkdir build
+    - pushd build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal FCFLAGS="-march=native" CFLAGS="-march=native" --disable-avx2 SCALAPACK_LDFLAGS="$MKL_GFORTRAN_SCALAPACK_LDFLAGS_MPI_NO_OMP" SCALAPACK_FCFLAGS="$MKL_GFORTRAN_SCALAPACK_FCFLAGS_MPI_NO_OMP" FC=mpif90 --prefix=$PWD/installdest --disable-avx2 || { cat config.log; exit 1; }
+    - make -j 8
+    - make install
+    - popd
+    - mkdir test_project/build
+    - pushd test_project/build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal PKG_CONFIG_PATH=../../build/installdest/lib/pkgconfig FC=mpif90 || { cat config.log; exit 1; }
+    - make -j 8
+    - export LD_LIBRARY_PATH=$MKL_HOME/lib/intel64:$LD_LIBRARY_PATH
+    - ./test_real
+    - make distclean
+    - popd
+    - pushd build
+    - make distclean
+    - rm -rf installdest
+    - popd
+
 # test test_project_legacy_api
 test_project_legacy_api:
   tags:
@@ -3452,6 +3478,32 @@ test_project_legacy_api:
     - rm -rf installdest
     - popd
 
+# test test_project_2stage
+test_project_2stage:
+  tags:
+    - buildtest
+  script:
+    - mkdir build
+    - pushd build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal FCFLAGS="-march=native" CFLAGS="-march=native" SCALAPACK_LDFLAGS="$MKL_GFORTRAN_SCALAPACK_LDFLAGS_MPI_NO_OMP" SCALAPACK_FCFLAGS="$MKL_GFORTRAN_SCALAPACK_FCFLAGS_MPI_NO_OMP" FC=mpif90 --prefix=$PWD/installdest --disable-avx2 || { cat config.log; exit 1; }
+    - make -j 8
+    - make install
+    - popd
+    - mkdir test_project_2stage/build
+    - pushd test_project_2stage/build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal PKG_CONFIG_PATH=../../build/installdest/lib/pkgconfig FC=mpif90 || { cat config.log; exit 1; }
+    - make -j 8
+    - export LD_LIBRARY_PATH=$MKL_HOME/lib/intel64:$LD_LIBRARY_PATH
+    - ./test_real2
+    - make distclean
+    - popd
+    - pushd build
+    - make distclean
+    - rm -rf installdest
+    - popd
+
 
 # test test_project_2stage_legacy_api
 test_project_2stage_legacy_api:
@@ -3479,6 +3531,29 @@ test_project_2stage_legacy_api:
     - rm -rf installdest
     - popd
 
+test_project_intel:
+  tags:
+    - buildtest
+  script:
+    - mkdir build
+    - pushd build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal SCALAPACK_LDFLAGS="$MKL_INTEL_SCALAPACK_LDFLAGS_MPI_NO_OMP" SCALAPACK_FCFLAGS="$MKL_INTEL_SCALAPACK_FCFLAGS_MPI_NO_OMP" FC=mpiifort --prefix=$PWD/installdest --disable-sse-assembly --disable-sse --disable-avx --disable-avx2 || { cat config.log; exit 1; }
+    - make -j 8
+    - make install
+    - popd
+    - mkdir test_project/build
+    - pushd test_project/build
+    - ../autogen.sh
+    - ../configure --enable-option-checking=fatal PKG_CONFIG_PATH=../../build/installdest/lib/pkgconfig FC=mpiifort || { cat config.log; exit 1; }
+    - make -j 8
+    - export LD_LIBRARY_PATH=$MKL_HOME/lib/intel64:$LD_LIBRARY_PATH
+    - ./test_real
+    - make distclean
+    - popd
+    - pushd build
+    - make distclean
+    - rm -rf installdest
 
 test_project_intel_legacy_api:
   tags:
@@ -3504,6 +3579,30 @@ test_project_intel_legacy_api:
     - make distclean
     - rm -rf installdest
 
+test_project_2stage_intel:
+ tags:
+   - buildtest
+ script:
+   - mkdir build
+   - pushd build
+   - ../autogen.sh
+   - ../configure --enable-option-checking=fatal SCALAPACK_LDFLAGS="$MKL_INTEL_SCALAPACK_LDFLAGS_MPI_NO_OMP" SCALAPACK_FCFLAGS="$MKL_INTEL_SCALAPACK_FCFLAGS_MPI_NO_OMP" FC=mpiifort --prefix=$PWD/installdest --disable-sse-assembly --disable-sse --disable-avx --disable-avx2 || { cat config.log; exit 1; }
+   - make -j 8
+   - make install
+   - popd
+   - mkdir test_project_2stage/build
+   - pushd test_project_2stage/build
+   - ../autogen.sh
+   - ../configure --enable-option-checking=fatal PKG_CONFIG_PATH=../../build/installdest/lib/pkgconfig FC=mpiifort || { cat config.log; exit 1; }
+   - make -j 8
+   - export LD_LIBRARY_PATH=$MKL_HOME/lib/intel64:$LD_LIBRARY_PATH
+   - ./test_real2
+   - make distclean
+   - popd
+   - pushd build
+   - make distclean
+   - rm -rf installdest
+
 
 test_project_2stage_intel_legacy_api:
  tags:

Makefile.am

@@ -649,7 +649,13 @@ EXTRA_DIST = \
   test_project/configure.ac \
   test_project/fdep \
   test_project/m4 \
-  test_project/src/test_real.F90
+  test_project/src/test_real.F90 \
+  test_project_2stage/Makefile.am \
+  test_project_2stage/autogen.sh \
+  test_project_2stage/configure.ac \
+  test_project_2stage/fdep \
+  test_project_2stage/m4 \
+  test_project_2stage/src/test_real2.F90
 
 if ENABLE_LEGACY
 EXTRA_DIST += \

test_project/src/test_real.F90

@@ -107,18 +107,16 @@ program test_real_example
    integer                          :: iseed(4096) ! Random seed, size should be sufficient for every generator
 
    integer                          :: STATUS
-   tinter                           :: success
+   integer                          :: success
    character(len=8)                 :: task_suffix
    integer                          :: j
 
    integer, parameter               :: error_unit = 0
 
-   class(elpa_t), pointer           :: elpa
+   class(elpa_t), pointer           :: e
    !-------------------------------------------------------------------------------
 
 
-   success = .true.
-
    ! default parameters
    na = 1000
    nev = 500
@@ -197,19 +195,19 @@ program test_real_example
      print *, "ELPA API version not supported"
      stop
    endif
-   elpa => elpa_allocate()
+   e => elpa_allocate()
 
    ! set parameters decribing the matrix and it's MPI distribution
-   call elpa%set("na", na, success)
-   call elpa%set("nev", nev, success)
-   call elpa%set("local_nrows", na_rows, success)
-   call elpa%set("local_ncols", na_cols, success)
-   call elpa%set("nblk", nblk, success)
-   call elpa%set("mpi_comm_parent", mpi_comm_world, success)
-   call elpa%set("process_row", my_prow, success)
-   call elpa%set("process_col", my_pcol, success)
-
-   succes = elpa%setup()
+   call e%set("na", na, success)
+   call e%set("nev", nev, success)
+   call e%set("local_nrows", na_rows, success)
+   call e%set("local_ncols", na_cols, success)
+   call e%set("nblk", nblk, success)
+   call e%set("mpi_comm_parent", mpi_comm_world, success)
+   call e%set("process_row", my_prow, success)
+   call e%set("process_col", my_pcol, success)
+
+   success = e%setup()
 
    call e%set("solver", elpa_solver_1stage, success)
 

test_project_2stage/Makefile.am

+## Process this file with automake to produce Makefile.in
+
+ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4
+
+AM_FCFLAGS = @FC_MODINC@modules @FC_MODOUT@modules $(ELPA_FCFLAGS)
+AM_LDFLAGS = $(ELPA_LIBS)
+
+#bindir = $(abs_top_builddir)
+bin_PROGRAMS = test_real2
+test_real2_SOURCES = src/test_real2.F90
+
+distclean-local:
+	-rm config-f90.h

test_project_2stage/autogen.sh

+#!/bin/sh -e
+
+mkdir -p m4/
+
+test -n "$srcdir" || srcdir=`dirname "$0"`
+test -n "$srcdir" || srcdir=.
+
+autoreconf --force --install --verbose "$srcdir"

test_project_2stage/configure.ac

+AC_PREREQ([2.69])
+AC_INIT([elpa_test_project],[2017.05.002], elpa-library@rzg.mpg.de)
+elpaversion="2017.05.002"
+AC_CONFIG_SRCDIR([src/test_real2.F90])
+
+AM_INIT_AUTOMAKE([foreign -Wall subdir-objects])
+
+# Without this, automake tries to be smart and rebuilt
+# the autoconf generated files such as configure, aclocal.m4, etc.,
+# in case the timestamps of files such as configure.ac are newer
+#
+# This only makes trouble for end users with out-of-date autoconf versions
+# that cannot produce these files
+AM_MAINTAINER_MODE([disable])
+
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_HEADERS([config.h])
+AM_SILENT_RULES([yes])
+
+rm -rf config.h config-f90.h
+
+AX_CHECK_GNU_MAKE()
+if test x$_cv_gnu_make_command = x ; then
+        AC_MSG_ERROR([Need GNU Make])
+fi
+
+AC_CHECK_PROG(CPP_FOUND,cpp,yes,no)
+if test x"${CPP_FOUND}" = xno; then
+  AC_MSG_ERROR([no cpp found])
+fi
+
+# gnu-make fortran module dependencies
+m4_include([fdep/fortran_dependencies.m4])
+FDEP_F90_GNU_MAKE_DEPS
+
+AC_PROG_INSTALL
+AM_PROG_CC_C_O
+AM_PROG_AR
+AM_PROG_AS
+
+AC_LANG([Fortran])
+m4_include([m4/ax_prog_fc_mpi.m4])
+
+dnl check whether an mpi compiler is available;
+dnl if not abort since it is mandatory
+AX_PROG_FC_MPI([],[have_mpi=yes],[have_mpi=no
+		 if test x"${have_mpi}" = xno; then
+  		  AC_MSG_ERROR([no mpi found])
+		  fi])
+
+AC_FC_FREEFORM
+AC_FC_MODULE_FLAG
+AC_FC_MODULE_OUTPUT_FLAG
+
+AC_MSG_CHECKING(whether OpenMP usage is specified)
+AC_ARG_WITH([openmp],
+		AS_HELP_STRING([--with-openmp],
+			       [use OpenMP threading, default no.]),
+	      [with_openmp=yes],
+	      [with_openmp=no])
+  AC_MSG_RESULT([${with_openmp}])
+  if test x"${enable_openmp}" = x"yes"; then
+     with_openmp=yes
+     AC_MSG_CHECKING(whether --enable-openmp is specified)
+     AC_MSG_RESULT([${enable_openmp}])
+  fi
+  AM_CONDITIONAL([WITH_OPENMP],[test x"$with_openmp" = x"yes"])
+  if test x"${with_openmp}" = x"yes"; then
+	AC_DEFINE([WITH_OPENMP], [1], [use OpenMP threading])
+        AX_ELPA_OPENMP
+	elpa="elpa_openmp-$elpaversion"
+  else
+	elpa="elpa-$elpaversion"
+  fi
+
+# Here comes the ELPA specific part
+PKG_PROG_PKG_CONFIG
+PKG_CHECK_MODULES([ELPA],[${elpa}],[],[AC_MSG_ERROR(["Need ${elpa}"])])
+PKG_CHECK_VAR([ELPA_FCFLAGS],[${elpa}],[fcflags])
+
+LT_INIT
+
+AC_SUBST([FC_MODINC])
+AC_SUBST([FC_MODOUT])
+
+rm -rf modules/ .fortran_dependencies/
+mkdir modules
+
+AC_CONFIG_FILES([
+  Makefile
+])
+AC_OUTPUT
+
+grep "^#define" config.h > config-f90.h

test_project_2stage/fdep/LICENSE

+Copyright (c) 2013 Lorenz Hüdepohl
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

test_project_2stage/fdep/README

+fdep
+----
+
+fdep is a small set of scripts to teach autoconf/automake (using GNU make)
+about the additional dependencies in Fortran 90 files due to modules.
+
+With this, Fortran files can be listed in any order in Makefile.am and parallel
+builds work.
+
+
+Usage
+-----
+
+  Put this project as a directory "fdep" in your source code, place the two
+  lines
+
+    m4_include([fdep/fortran_dependencies.m4])
+    FDEP_F90_GNU_MAKE_DEPS
+
+  in your configure.ac, and add a single line
+
+    @FORTRAN_MODULE_DEPS@
+
+  in your Makefile.am. All .F90 files of all programs in bin_PROGRAMS and all
+  libraries in lib_LTLIBRARIES will now be scanned for modules and the
+  resulting dependencies will be honoured.
+
+
+What is the problem with Fortran 90 modules and make dependencies?
+------------------------------------------------------------------
+
+  In Fortran 90 source files one can define any number of "modules", containing
+  variable and function definitions. The names of the modules defined in a file
+  can be arbitrary.
+
+  In another source file these modules can be used, informing the Fortran
+  compiler about the definitions in these modules (e.g. to do type-checking).
+  This creates a problem, as the compiler has to know somehow where the module
+  is defined.
+
+  The usual solution employed by almost every Fortran compiler is to create
+  special "module" files for each module contained in a source file during
+  compilation. Their file name is derived by a compiler-specific recipe of the
+  modules identifier (usually the lower-cased module's identifier plus ".mod",
+  so "foo_module.mod" and "some_other_module.mod"). When the compiler
+  encounters a "use" statement during the compilation of another file, it
+  confers to this file to import the definitions of the module.
+
+  That means, you cannot compile files using modules defined in yet un-compiled
+  files, one has to tell make about this dependency.
+
+  (A primitive solution to this problem is listing the file in a pre-sorted
+   order, so that files defining modules are compiled first.
+
+   However, that way the dependency-graph make knows about is incomplete and
+   parallel builds will fail with a high probability)
+
+
+How does fdep solve this problem technically?
+---------------------------------------------
+
+  As the name of the module files can be an arbitrary (and some compilers might
+  even save the module definitions in some completely different way), fdep
+  tells make about the module dependencies as a relation directly between
+  object files, e.g. when a file 'b.f90' is using any module of file 'a.f90',
+  fdep adds a dependency of
+
+    b.o: a.o
+
+
+  More specifically, the perl-script fortran_dependencies.pl is run by make to
+  create a file .fortran_dependencies/dependencies.mk, which is then included.
+  To do this, first every source file (for every defined program and library)
+  is scanned for lines with "module" or "use" statements. These are saved in
+  two additional files (.use_mods and .def_mods) per source file and contain
+  lists of defined and required modules. The perl script then reads these in
+  and produces the appropriate rules.
+
+
+Drawbacks
+---------
+
+  GNU make is required. The detailed dependency graph due to "module" and "use"
+  statements is only available after pre-processing, when autoconf and even
+  configure is long over. To still get proper dependencies, fdep uses GNU
+  make's feature to include generated sub-Makefiles during a running make
+  invocation.
+
+
+License
+-------
+
+  fdep is released under the MIT License. See the LICENSE file for details.
+
+
+Contributing
+------------
+
+  Send your patches or pull-request to dev@stellardeath.org

test_project_2stage/fdep/fortran_dependencies.m4

+AC_DEFUN([FDEP_F90_GNU_MAKE_DEPS],[
+AC_MSG_CHECKING([for GNU make])
+for a in "$MAKE" make gmake gnumake ; do
+        if test -z "$a" ; then continue ; fi ;
+        if  ( sh -c "$a --version" 2> /dev/null | grep GNU  2>&1 > /dev/null ) ;  then
+                _fdep_gnu_make_command=$a ;
+                break;
+        fi
+done ;
+AC_MSG_RESULT([$_fdep_gnu_make_command])
+if test x$_fdep_gnu_make_command = x ; then
+	AC_MSG_ERROR([Need GNU Make])
+fi
+AC_SUBST([FORTRAN_MODULE_DEPS], ["
+CLEANFILES +=
+include ${srcdir}/fdep/fortran_dependencies.mk
+"])
+AM_SUBST_NOTMAKE([FORTRAN_MODULE_DEPS])
+])

test_project_2stage/fdep/fortran_dependencies.mk

+_f90_verbose = $(_f90_verbose_$(V))
+_f90_verbose_ = $(_f90_verbose_$(AM_DEFAULT_VERBOSITY))
+_f90_verbose_0 = @echo "  $1";
+_f90_targets = $(subst -,_,$(patsubst %.la,%_la,$(patsubst %.a,%_a,$(patsubst %.so,%_so,$(PROGRAMS) $(LTLIBRARIES)))))
+FORTRAN_CPP ?= cpp -P -traditional -Wall -Werror
+
+# $1 source files
+#
+# returns: file without any .F90 .f90 .F .f extension
+define strip_fortran_ext
+$(patsubst %.F90,%,$(patsubst %.f90,%,$(patsubst %.F,%,$(patsubst %.f,%,$1))))
+endef
+
+# $1 program
+#
+# returns:
+#  '1' if object files for target $1 are prefixed due to 'per-target' flags,
+#  '' (the empty string) otherwise. See the automake manual for 'per-target'
+#  compilation
+#
+define is_per_target
+$(if $(filter $(call strip_fortran_ext,$(firstword $(call fortran_sources,$1))),$(patsubst %.o,%,$(patsubst %.lo,%,$($1_OBJECTS)))),,1)
+endef
+
+# $1 top-level target name (i.e. an entry of _f90_targets)
+#
+# returns: all target source files matching *.F90 *.f90 *.F *.f
+define fortran_sources
+$(filter %.F90 %.f90 %.F %.f,$($1_SOURCES))
+endef
+
+# $1 top-level target name
+#
+# returns: the appropriate extension (i.e. 'o' for normal programs, '.lo' for libraries)
+define object_extension
+$(if $(filter $1,$(PROGRAMS)),o,lo)
+endef
+
+# $1 source_file
+# $2 stem
+# $3 program
+define module_targets
+$(eval _$3_use_mods += $(dir $1)$2$(call strip_fortran_ext,$(notdir $1)).use_mods.$3.$(call object_extension,$3))
+$(dir $1)$2$(call strip_fortran_ext,$(notdir $1)).use_mods.$3.$(call object_extension,$3): $1 $(dir $1)$(am__dirstamp)
+	$(call _f90_verbose,F90 USE  [$3] $$<)$(FORTRAN_CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $($p_CPPFLAGS) $(CPPFLAGS) -o /dev/stdout $$< | grep -i -o '^ *use [^ ,!:]*' | sort -u > $$@
+
+$(eval _$3_def_mods += $(dir $1)$2$(call strip_fortran_ext,$(notdir $1)).def_mods.$3.$(call object_extension,$3))
+$(dir $1)$2$(call strip_fortran_ext,$(notdir $1)).def_mods.$3.$(call object_extension,$3): $1 $(dir $1)$(am__dirstamp)
+	$(call _f90_verbose,F90 MOD  [$3] $$<)$(FORTRAN_CPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $($p_CPPFLAGS) $(CPPFLAGS) -o /dev/stdout $$< | grep -i -o '^ *module [^!]*' | grep -v "\<procedure\>" > $$@ || true
+
+endef
+$(foreach p,$(_f90_targets),$(if $(call is_per_target,$p),$(foreach s,$(call fortran_sources,$p),$(eval $(call module_targets,$s,$p-,$p))),$(foreach s,$(call fortran_sources,$p),$(eval $(call module_targets,$s,,$p)))))
+
+_f90_depdir=$(abs_builddir)/.fortran_dependencies
+_f90_depfile = $(_f90_depdir)/dependencies.mk
+
+define is_clean
+$(if $(filter-out mostlyclean clean distclean maintainer-clean,$(MAKECMDGOALS)),0,1)
+endef
+
+define _fdep_newline
+
+
+endef
+
+ifneq ($(call is_clean),1)
+include $(_f90_depfile)
+endif
+$(_f90_depfile): $(top_srcdir)/fdep/fortran_dependencies.pl $(foreach p,$(_f90_targets),$(_$p_use_mods) $(_$p_def_mods)) | $(foreach p,$(_f90_targets),$(_f90_depdir)/$p)
+	$(call _f90_verbose,F90 DEPS $@)echo > $@; $(foreach p,$(_f90_targets),$(top_srcdir)/fdep/fortran_dependencies.pl $p $(_$p_use_mods) $(_$p_def_mods) >> $@ || { rm $@; exit 1; } ;$(_fdep_newline))
+
+$(_f90_depdir):
+	@mkdir $@
+
+$(foreach p,$(_f90_targets),$(_f90_depdir)/$p): | $(_f90_depdir)
+	@mkdir $@
+
+CLEANFILES += $(foreach p,$(_f90_targets),$(_$p_def_mods) $(_$p_use_mods))
+CLEANFILES += $(foreach p,$(_f90_targets),$(_f90_depdir)/$p/*)
+CLEANFILES += $(_f90_depfile)

test_project_2stage/fdep/fortran_dependencies.pl

+#!/usr/bin/perl -w
+
+use strict;
+
+my %defs = ();
+my %uses = ();
+
+my $use_re = qr/^\s*use\s+(\S+)\s*$/;
+my $def_re = qr/^\s*module\s+(\S+)\s*$/;
+
+sub add_use {
+	my ($file, $module) = @_;
+	if (defined($defs{$module}) && $defs{$module} eq $file) {
+		# do not add self-dependencies
+		return;
+	}
+	if (!defined($uses{$file})) {
+		$uses{$file} = { $module => 1 };
+	} else {
+		$uses{$file}{$module} = 1;
+	}
+}
+
+sub add_def {
+	my ($file, $module) = @_;
+	if (!defined($defs{$module})) {
+		$defs{$module} = $file;
+		if (defined($uses{$file}) && defined($uses{$file}{$module})) {
+			delete $uses{$file}{$module};
+		}
+	} else {
+		die "Module $module both defined in $file, $defs{$module}";
+	}
+}
+
+my $p = shift;
+
+foreach my $file (@ARGV) {
+	my $re;
+	my $add;
+	my $object;
+	if (defined($ENV{V}) && $ENV{V} ge "2") {
+		print STDERR "fdep: Considering file $file\n";
+	}
+	if ($file =~ /^(.*)\.def_mods.$p(\..*)$/) {
+		$re = $def_re;
+		$add = \&add_def;
+		$object = $1 . $2;
+	} elsif ($file =~ /^(.*)\.use_mods.$p(\..*)$/) {
+		$re = $use_re;
+		$add = \&add_use;
+		$object = $1 . $2;
+	} else {
+		die "Unrecognized file extension for '$file'\nExpected (.*)\.def_mods.$p(\..*) or (.*)\.use_mods.$p(\..*)";
+	}
+	open(FILE,"<",$file) || die "\nCan't open $file: $!\n\n";
+	while(<FILE>) {
+		chomp;
+		$_ = lc($_);
+		if ($_ =~ $re) {
+			&$add($object, $1);
+		} else {
+			die "Cannot parse module statement '$_', was expecting $re";
+		}
+	}
+	close(FILE)
+}
+
+foreach my $object (sort keys %uses) {
+	for my $m (keys %{$uses{$object}}) {
+		if (defined $defs{$m}) {
+			print "$object: ", $defs{$m}, "\n";
+		} elsif (defined($ENV{V}) && $ENV{V} ge "1") {
+			print STDERR "fdep: Warning: Cannot find definition of module $m in files for program $p, might be external\n";
+		}
+	}
+}

test_project_2stage/m4/ax_prog_fc_mpi.m4

+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_prog_fc_mpi.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_FC_MPI([MPI-WANTED-TEST[, ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]])
+#
+# DESCRIPTION
+#
+#   This macro tries to find out how to compile Fortran77 programs that use
+#   MPI (Message Passing Interface), a standard API for parallel process