#							-*- Autotest -*-

AT_BANNER([Fortran low level compiling/preprocessing macros.])

# Copyright (C) 2000-2001, 2003, 2008-2017, 2020 Free Software
# Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Since the macros which compile are required by most tests, check
# them first.  But remember that looking for a compiler is even more
# primitive, so check those first.


## --------------------- ##
## Fortran 77 Compiler.  ##
## --------------------- ##


AT_CHECK_MACRO([GNU Fortran 77],
[[AC_LANG(Fortran 77)
AC_LANG_COMPILER

: > conftest.f
if AC_TRY_COMMAND([$F77 --version | grep GNU >&2]) \
   || AC_TRY_COMMAND([$F77 -v -c conftest.f 2>&1 | grep "f2c " >&2]); then
  # Be sure to remove files which might be created by compilers that
  # don't support --version, or by the second compile.
  rm -f a.exe a.out conftest.f conftest.$ac_objext
  # Has GNU in --version.
  test "$G77" != yes &&
    AC_MSG_ERROR([failed to recognize GNU Fortran 77 compiler])
else
  # Be sure to remove files which might be created by compilers that
  # don't support --version, or by the second compile.
  rm -f a.exe a.out conftest.f conftest.$ac_objext
  # Has not.
  test "$G77" = yes &&
    AC_MSG_ERROR([incorrectly recognized a GNU Fortran 77 compiler])
fi
]])



## ------------------ ##
## Fortran Compiler.  ##
## ------------------ ##


AT_CHECK_MACRO([GNU Fortran],
[[AC_LANG(Fortran)
AC_LANG_COMPILER

# No Fortran compiler is known not to support "*.f".
AC_FC_SRCEXT([f])

# GNU Fortran is known to support freeform.
AC_FC_FREEFORM([],
               [AC_MSG_WARN([Fortran does not accept free-form source])])
if test "$ac_compiler_gnu" = yes; then
  case $FCFLAGS in
   *-ffree-form*) ;;
   *) AC_MSG_ERROR([failed to recognize GNU Fortran's -ffree-form option]);;
  esac
fi
]])


## ------------------------- ##
## AC_OPENMP and Fortran 77. ##
## ------------------------- ##

AT_SETUP([AC_OPENMP and Fortran 77])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_F77
AC_LANG([Fortran 77])
AC_OPENMP
if test "X$ac_cv_prog_f77_openmp" = Xunsupported; then
  AS_EXIT([77])
fi
FFLAGS="$FFLAGS $OPENMP_FFLAGS"
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[foo@EXEEXT@: foo.@OBJEXT@
	@F77@ @FFLAGS@ @LDFLAGS@ -o $@ foo.@OBJEXT@

foo.@OBJEXT@: foo.f
	@F77@ @FFLAGS@ -c foo.f
]])

AT_DATA([foo.f],
[[       program main
      end
]])

: "${MAKE=make}"
AT_CHECK([env ACLOCAL=true autoreconf -vi], [], [ignore], [ignore])
AT_CHECK_CONFIGURE
AT_CHECK([$MAKE], [], [ignore], [ignore])

AT_CLEANUP


## ---------------------- ##
## AC_OPENMP and Fortran. ##
## ---------------------- ##

AT_SETUP([AC_OPENMP and Fortran])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
AC_LANG([Fortran])
AC_OPENMP
if test "X$ac_cv_prog_fc_openmp" = Xunsupported; then
  AS_EXIT([77])
fi
FCFLAGS="$FCFLAGS $OPENMP_FCFLAGS"
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[foo@EXEEXT@: foo.@OBJEXT@
	@FC@ @FCFLAGS@ @LDFLAGS@ -o $@ foo.@OBJEXT@

foo.@OBJEXT@: foo.f
	@FC@ @FCFLAGS@ -c foo.f
]])

AT_DATA([foo.f],
[[      program main
      end
]])

: "${MAKE=make}"
AT_CHECK([env ACLOCAL=true autoreconf -vi], [], [ignore], [ignore])
AT_CHECK_CONFIGURE
AT_CHECK([$MAKE], [], [ignore], [ignore])

AT_CLEANUP


# We don't test the AC_F77_LIBRARY_LDFLAGS macro on its own because of
# (autoconf.info)Fortran Compiler:
#      The macros `AC_F77_DUMMY_MAIN' and `AC_FC_DUMMY_MAIN' or
#    `AC_F77_MAIN' and `AC_FC_MAIN' are probably also necessary to link
#    C/C++ with Fortran; see below.
#
# and we would need libtool to create shared libraries.

# Further, for any sensible test of the AC_F{77,C}(_DUMMY)?_MAIN macros
# we also need to use AC_F{77,C}_WRAPPERS, in order to be able to actually
# call the functions.

## ------------------------ ##
## AC_F77_DUMMY_MAIN usage. ##
## ------------------------ ##

AT_SETUP([AC_F77_DUMMY_MAIN usage])

AT_CONFIGURE_AC([[
AC_PROG_F77
AC_F77_DUMMY_MAIN([], [AC_MSG_FAILURE([failed to determine F77 dummy main], [77])])
AC_F77_WRAPPERS
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[
all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@F77@ @FFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[C     This is just a purely numeric routine, no I/O needed.
C     Taken from autoconf.texi:Fortran Compiler.
      subroutine foobar (x, y)
      double precision x, y
      y = 3.14159 * x
      return
      end
]])

AT_DATA([cprogram.c],
[[#include <config.h>
#include <math.h>

/* Taken from autoconf.texi:Fortran Compiler. */
#define FOOBAR_F77 F77_FUNC (foobar, FOOBAR)
#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void FOOBAR_F77 (double *x, double *y);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef F77_DUMMY_MAIN
#  ifdef __cplusplus
     extern "C"
#  endif
   int F77_DUMMY_MAIN () { return 1; }
#endif

int main(int argc, char *argv[])
{
  double x = 2.7183, y;
  FOOBAR_F77 (&x, &y);
  if (fabs (8.539784097 - y) > 1.e-6)
    return 1;
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  F77_DUMMY_MAIN
  F77_FUNC
  F77_FUNC_
  FC_DUMMY_MAIN_EQ_F77
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram])

AT_CLEANUP


## ----------------------- ##
## AC_FC_DUMMY_MAIN usage. ##
## ----------------------- ##

AT_SETUP([AC_FC_DUMMY_MAIN usage])

AT_CONFIGURE_AC([[
AC_PROG_FC
AC_FC_FIXEDFORM
AC_FC_DUMMY_MAIN([], [AC_MSG_FAILURE([failed to determine FC dummy main], [77])])
AC_FC_WRAPPERS
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[
all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FCLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[C     This is just a purely numeric routine, no I/O needed.
C     Taken from autoconf.texi:Fortran Compiler.
      subroutine foobar (x, y)
      double precision x, y
      y = 3.14159 * x
      return
      end
]])

AT_DATA([cprogram.c],
[[#include <config.h>
#include <math.h>

/* Taken from autoconf.texi:Fortran Compiler. */
#define FOOBAR_FC FC_FUNC (foobar, FOOBAR)
#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void FOOBAR_FC(double *x, double *y);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef FC_DUMMY_MAIN
#  ifdef __cplusplus
     extern "C"
#  endif
   int FC_DUMMY_MAIN () { return 1; }
#endif

int main (int argc, char *argv[])
{
  double x = 2.7183, y;
  FOOBAR_FC (&x, &y);
  if (fabs (8.539784097 - y) > 1.e-6)
    return 1;
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  FC_DUMMY_MAIN
  FC_DUMMY_MAIN_EQ_F77
  FC_FUNC
  FC_FUNC_
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram])

AT_CLEANUP


## ------------------ ##
## AC_F77_MAIN usage. ##
## ------------------ ##

AT_SETUP([AC_F77_MAIN usage])

AT_CONFIGURE_AC([[
AC_PROG_F77
AC_F77_MAIN
AC_F77_WRAPPERS
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[
all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@F77@ @FFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[C     This uses Fortran I/O, so is likely to require Fortran startup.
      subroutine foobar (x)
      integer x
      if (x == 42) then
        write(*,*) 'some output from Fortran sources'
      end if
      end
]])

AT_DATA([cprogram.c],
[[#include <config.h>
#include <stdio.h>

/* Taken from autoconf.texi:Fortran Compiler. */
#define FOOBAR_F77 F77_FUNC (foobar, FOOBAR)
#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void FOOBAR_F77 (int *x);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef __cplusplus
  extern "C"
#endif
int F77_MAIN (int argc, char *argv[]);

int F77_MAIN (int argc, char *argv[])
{
  int x = 42;
  puts ("output from C main");
  fflush (stdout);
  FOOBAR_F77 (&x);
  puts ("more output from C main");
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  F77_DUMMY_MAIN
  F77_FUNC
  F77_FUNC_
  F77_MAIN
  FC_DUMMY_MAIN_EQ_F77
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram], [], [output from C main
dnl  some output from Fortran sources
dnl more output from C main
dnl ])

AT_CLEANUP


## ----------------- ##
## AC_FC_MAIN usage. ##
## ----------------- ##

AT_SETUP([AC_FC_MAIN usage])

AT_CONFIGURE_AC([[
AC_PROG_FC
AC_FC_FIXEDFORM
AC_FC_MAIN
AC_FC_WRAPPERS
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FCLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[C     This uses Fortran I/O, so is likely to require Fortran startup.
      subroutine foobar (x)
      integer x
      if (x == 42) then
        write (*,*) 'some output from Fortran sources'
      end if
      end
]])

AT_DATA([cprogram.c],
[[#include <config.h>
#include <stdio.h>

/* Taken from autoconf.texi:Fortran Compiler. */
#define FOOBAR_FC FC_FUNC (foobar, FOOBAR)
#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void FOOBAR_FC (int *x);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef __cplusplus
  extern "C"
#endif
int FC_MAIN (int argc, char *argv[]);

int FC_MAIN (int argc, char *argv[])
{
  int x = 42;
  puts ("output from C main");
  fflush (stdout);
  FOOBAR_FC (&x);
  puts ("more output from C main");
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  FC_DUMMY_MAIN
  FC_DUMMY_MAIN_EQ_F77
  FC_FUNC
  FC_FUNC_
  FC_MAIN
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram], [], [output from C main
dnl  some output from Fortran sources
dnl more output from C main
dnl ])

AT_CLEANUP


## ------------------ ##
## AC_F77_FUNC usage. ##
## ------------------ ##

AT_SETUP([AC_F77_FUNC usage])

AT_CONFIGURE_AC([[
AC_PROG_F77
AC_F77_FUNC([foobar])
AC_SUBST([foobar])
AC_PROG_CC
AC_CONFIG_FILES([cprogram.c:cprogram.in])
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[
all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@F77@ @FFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[      subroutine foobar (x)
      integer x
      x = 42
      return
      end
]])

AT_DATA([cprogram.in],
[[#include <config.h>
#include <math.h>

#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void @foobar@ (int *x);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef F77_DUMMY_MAIN
#  ifdef __cplusplus
     extern "C"
#  endif
   int F77_DUMMY_MAIN () { return 1; }
#endif

int main(int argc, char *argv[])
{
  int x;
  @foobar@ (&x);
  if (x != 42)
    return 1;
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  F77_DUMMY_MAIN
  FC_DUMMY_MAIN_EQ_F77
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram])

AT_CLEANUP


## ----------------- ##
## AC_FC_FUNC usage. ##
## ----------------- ##

AT_SETUP([AC_FC_FUNC usage])

AT_CONFIGURE_AC([[
AC_PROG_FC
AC_FC_FUNC([foobar])
AC_SUBST([foobar])
AC_PROG_CC
AC_CONFIG_FILES([cprogram.c:cprogram.in])
AC_CONFIG_FILES([Makefile])
]])

AT_DATA([Makefile.in],
[[
all: cprogram@EXEEXT@

cprogram@EXEEXT@: cprogram.@OBJEXT@ foobar.@OBJEXT@
	@CC@ @CFLAGS@ @LDFLAGS@ -o $@ cprogram.@OBJEXT@ foobar.@OBJEXT@ @LIBS@ @FCLIBS@

.SUFFIXES: .c .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c $<
.c.@OBJEXT@:
	@CC@ @DEFS@ -I. @CPPFLAGS@ @CFLAGS@ -c $<
]])

AT_DATA([foobar.f],
[[      subroutine foobar (x)
      integer x
      x = 42
      return
      end
]])

AT_DATA([cprogram.in],
[[#include <config.h>
#include <math.h>

#ifdef __cplusplus
extern "C"  /* prevent C++ name mangling */
#endif
void @foobar@ (int *x);

/* Taken from autoconf.texi:Fortran Compiler.  */
#ifdef FC_DUMMY_MAIN
#  ifdef __cplusplus
     extern "C"
#  endif
   int FC_DUMMY_MAIN () { return 1; }
#endif

int main(int argc, char *argv[])
{
  int x;
  @foobar@ (&x);
  if (x != 42)
    return 1;
  return 0;
}
]])

AT_CHECK_AUTOCONF
AT_CHECK_AUTOHEADER([], [
  FC_DUMMY_MAIN
  FC_DUMMY_MAIN_EQ_F77
])
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./cprogram])
AT_CLEANUP


## ------------------- ##
## AC_FC_SRCEXT usage. ##
## ------------------- ##

AT_SETUP([AC_FC_SRCEXT usage])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
FCFLAGS_NOFREE=$FCFLAGS
AC_SUBST([FCFLAGS_NOFREE])
AC_FC_FREEFORM
# Unconditionally require .f to work.
AC_FC_SRCEXT([f])
# For each other extension, fail gracefully if it does not work:
# Not all compilers support all extensions/language versions.
m4@&t@_foreach([ext], [f77, f90, f95, f03, f08],
  [AC_FC_SRCEXT(ext, ext[_object='foo]ext[.$(OBJEXT)'], ext[_object=])
   AC_SUBST(ext[_object])])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[OBJEXT = @OBJEXT@

all: prog@EXEEXT@
prog@EXEEXT@: foof.@OBJEXT@ @f77_object@ @f90_object@ \
	      @f95_object@ @f03_object@ @f08_object@
	@FC@ @FCFLAGS@ -o $@ foof.@OBJEXT@ @f77_object@ @f90_object@ \
			     @f95_object@ @f03_object@ @f08_object@

.SUFFIXES: .f .f77 .f90 .f95 .f03 .f08 .@OBJEXT@
.f.@OBJEXT@:
	@FC@ -c @FCFLAGS_NOFREE@ @FCFLAGS_f@ $<
.f77.@OBJEXT@:
	@FC@ -c @FCFLAGS_NOFREE@ @FCFLAGS_f77@ $<
.f90.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f90@ $<
.f95.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f95@ $<
.f03.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f03@ $<
.f08.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f08@ $<
]])

AT_DATA([foof.f],
[[      program main
      end
]])

AT_DATA([foof77.f77],
[[      subroutine foof77
      end
]])

AT_DATA([foof90.f90],
[[subroutine foof90
end
]])

AT_DATA([foof95.f95],
[[subroutine foof95
end
]])

AT_DATA([foof03.f03],
[[subroutine foof03
end
]])

AT_DATA([foof08.f08],
[[subroutine foof08
end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])

AT_CLEANUP


## ---------------------- ##
## AC_FC_PP_SRCEXT usage. ##
## ---------------------- ##

AT_SETUP([AC_FC_PP_SRCEXT usage])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
# Unconditionally require .f and .F to work.
AC_FC_PP_SRCEXT([f])
AC_FC_PP_SRCEXT([F])
# For each other extension, fail gracefully if it does not work:
# Not all compilers support all extensions/language versions.
m4@&t@_foreach([ext], [f77, f90, f95, f03, f08],
  [AC_FC_PP_SRCEXT(ext, ext[_object='foo]ext[.$(OBJEXT)'], ext[_object=])
   AC_SUBST(ext[_object])])
m4@&t@_foreach([ext], [F77, F90, F95, F03, F08],
  [AC_FC_PP_SRCEXT(ext, ext[_object='bar]ext[.$(OBJEXT)'], ext[_object=])
   AC_SUBST(ext[_object])])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[OBJEXT = @OBJEXT@

all: prog@EXEEXT@
prog@EXEEXT@: foof.@OBJEXT@ @f77_object@ @f90_object@ \
	      @f95_object@ @f03_object@ @f08_object@ \
	      barF.@OBJEXT@ @F77_object@ @F90_object@ \
	      @F95_object@ @F03_object@ @F08_object@
	@FC@ @FCFLAGS@ -o $@ foof.@OBJEXT@ @f77_object@ @f90_object@ \
			     @f95_object@ @f03_object@ @f08_object@ \
			     barF.@OBJEXT@ @F77_object@ @F90_object@ \
			     @F95_object@ @F03_object@ @F08_object@

.SUFFIXES: .f .f77 .f90 .f95 .f03 .f08 .F .F77 .F90 .F95 .F03 .F08 .@OBJEXT@
.f.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f@ $<
.f77.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f77@ $<
.f90.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f90@ $<
.f95.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f95@ $<
.f03.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f03@ $<
.f08.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_f08@ $<
.F.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F@ $<
.F77.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F77@ $<
.F90.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F90@ $<
.F95.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F95@ $<
.F03.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F03@ $<
.F08.@OBJEXT@:
	@FC@ -c @FCFLAGS@ @FCFLAGS_F08@ $<
]])

for ext in f77 f90 f95 f03 f08; do
  cat > foo$ext.$ext <<EOF
      subroutine foo$ext
#if 0
this is not correct fortran
#endif
      end
EOF
done

for ext in F F77 F90 F95 F03 F08; do
  cat > bar$ext.$ext <<EOF
      subroutine bar$ext
#if 0
this is not correct fortran
#endif
      end
EOF
done

AT_DATA([foof.f],
[[      program main
#if 0
this is not correct fortran
#endif
      end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])

AT_CLEANUP


## --------------- ##
## AC_FC_FREEFORM. ##
## --------------- ##

AT_SETUP([AC_FC_FREEFORM])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
AC_FC_FREEFORM
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[prog: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c $<
]])

AT_DATA([prog.f],
[[program main
end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./prog])

AT_CLEANUP


## --------------------------------- ##
## AC_FC_FREEFORM with AC_FC_SRCEXT. ##
## --------------------------------- ##

AT_SETUP([AC_FC_FREEFORM with AC_FC_SRCEXT])

AT_DATA([configure.ac],
[[AC_INIT
AC_FC_SRCEXT([f90], [], [AS_EXIT([77])])
AC_PROG_FC
AC_FC_FREEFORM
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[prog: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f90 .@OBJEXT@
.f90.@OBJEXT@:
	@FC@ @FCFLAGS@ -c @FCFLAGS_f90@ $<
]])

AT_DATA([prog.f90],
[[program main
end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./prog])

AT_CLEANUP


## ---------------- ##
## AC_FC_FIXEDFORM. ##
## ---------------- ##

AT_SETUP([AC_FC_FIXEDFORM])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
AC_FC_FIXEDFORM
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[prog: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c $<
]])

AT_DATA([prog.f],
[[      program main
C      fixed-form style comment
       end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./prog])

AT_CLEANUP


## ---------------------------------- ##
## AC_FC_FIXEDFORM with AC_FC_SRCEXT. ##
## ---------------------------------- ##

AT_SETUP([AC_FC_FIXEDFORM with AC_FC_SRCEXT])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
AC_FC_SRCEXT([f90], [], [AS_EXIT([77])])
AC_FC_FIXEDFORM
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

AT_DATA([Makefile.in],
[[prog: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f90 .@OBJEXT@
.f90.@OBJEXT@:
	@FC@ @FCFLAGS@ -c @FCFLAGS_f90@ $<
]])

AT_DATA([prog.f90],
[[      program main
C      fixed-form style comment
       end
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
dnl AT_CHECK([./prog])

AT_CLEANUP


## ------------------ ##
## AC_FC_LINE_LENGTH. ##
## ------------------ ##

AT_SETUP([AC_FC_LINE_LENGTH])

AT_DATA([Makefile.in],
[[prog@EXEEXT@: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c @FCFLAGS_f@ $<

clean:
	rm -f *.@OBJEXT@ prog@EEXEXT@
]])

line_80=\
'subroutine foo(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11)'
line_132=\
'subroutine foo(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11,'\
'arg12,arg13,arg14,arg15,arg16,arg17,arg18,arg19)'
line_254=\
'subroutine foo(arg1,arg2,arg3,arg4,arg5,arg6,arg7,arg8,arg9,arg10,arg11,'\
'arg12,arg13,arg14,arg15,arg16,arg17,arg18,arg19,arg20,arg21,arg22,arg23,'\
'arg24,arg25,arg26,arg27,arg28,arg29,arg30,arg31,arg32,arg33,arg34,arg35,'\
'arg36,arg37,arg38,arg39,arg40)'

for len in 80 132 254
do
  if test $len -eq 254; then arg=unlimited; else arg=$len; fi
  eval long_line=\$line_$len

  # Try free-form first, it has a bigger chance of succeeding.
  for fixed_or_free in FREEFORM FIXEDFORM
  do

    cat >configure.ac <<EOF
AC_INIT
AC_PROG_FC
AC_FC_SRCEXT([f])
AC_FC_$fixed_or_free
AC_FC_LINE_LENGTH([$arg])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
EOF

    cat >prog.f <<EOF
       $long_line
       end subroutine
       program main
       end program
EOF

    AT_CHECK_AUTOCONF
    AT_CHECK_CONFIGURE
    : "${MAKE=make}"
    AT_CHECK([$MAKE], [], [ignore], [ignore])
    dnl AT_CHECK([./prog])
    AT_CHECK([$MAKE clean], [], [ignore], [ignore])

  done
done

AT_CLEANUP


## ------------------- ##
## AC_FC_CHECK_BOUNDS. ##
## ------------------- ##

AT_SETUP([AC_FC_CHECK_BOUNDS])

AT_DATA([Makefile.in],
[[prog@EXEEXT@: prog.@OBJEXT@
	@FC@ @FCFLAGS@ -o $@ prog.@OBJEXT@ @LIBS@

.SUFFIXES: .f .@OBJEXT@
.f.@OBJEXT@:
	@FC@ @FCFLAGS@ -c @FCFLAGS_f@ $<

clean:
	rm -f *.@OBJEXT@ prog@EEXEXT@
]])

cat >configure.ac <<EOF
AC_INIT
AC_PROG_FC
AC_FC_SRCEXT([f])
AC_FC_CHECK_BOUNDS
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
EOF

AT_DATA([prog.f],
[[
      subroutine copy(a,b,n)
      integer a(:), b(:), n, i
      do i = 1, n
         a(i) = b(i)
      end do
      end subroutine

      program main
      integer, parameter :: n = 20
      integer a(1:n), b(1:n-1), i
      interface
         subroutine copy(a,b,n)
         integer a(:), b(:), i
         end subroutine
      end interface

      call copy(a,b,n)
      end program
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [ignore], [ignore])
AT_CHECK([./prog || exit 1], [1], [ignore], [ignore])
AT_CHECK([$MAKE clean], [], [ignore], [ignore])

AT_CLEANUP


## ------------------ ##
## AC_FC_MODULE_FLAG. ##
## ------------------ ##

AT_SETUP([AC_FC_MODULE_FLAG])

AT_DATA([Makefile.in],
[[OBJEXT = @OBJEXT@
EXEEXT = @EXEEXT@
LIBS = @LIBS@
ac_empty = @ac_empty@
FC = @FC@
FC_MODEXT = @FC_MODEXT@
FC_MODINC = @FC_MODINC@
FCFLAGS = @FCFLAGS@
FCFLAGS_f = @FCFLAGS_f@

prog$(EXEEXT): sub/mod.$(OBJEXT) prog.$(OBJEXT)
	$(FC) $(FCFLAGS) -o $@ prog.$(OBJEXT) sub/mod.$(OBJEXT) $(LIBS)

sub/mod.$(OBJEXT): sub/mod.f
	cd sub && $(FC) $(FCFLAGS) -c $(FCFLAGS_f) mod.f

# Depend on the object, for the module dependency.
prog.$(OBJEXT): prog.f sub/mod.$(OBJEXT)
	$(FC) $(FCFLAGS) $(FC_MODINC). $(FC_MODINC)sub -c $(FCFLAGS_f) $<

clean:
	-test -z "$(FC_MODEXT)" || rm -f *.$(FC_MODEXT) sub/*.$(FC_MODEXT)
	-rm -f *.$(OBJEXT) sub/*.$(OBJEXT) prog$(EXEEXT)
]])

AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_FC
AC_FC_SRCEXT([f])
AC_FC_MODULE_FLAG
if test -n "$FC_MODINC"; then
  FCFLAGS="$FCFLAGS $FC_MODINC. ${FC_MODINC}sub"
fi
AC_FC_MODULE_EXTENSION
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
]])

mkdir sub

AT_DATA([sub/mod.f],
[[      module foobar
      end module foobar
]])

AT_DATA([prog.f],
[[      program main
      use foobar
      end program
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE
: "${MAKE=make}"
AT_CHECK([$MAKE], [], [stdout], [stderr])
# Both the FCFLAGS setting from configure.ac, and the Makefile rule
# should add to the module search path.
AT_CHECK([grep 'sub .*sub ' stdout stderr], [], [ignore])
AT_CHECK([./prog], [], [ignore], [ignore])
AT_CHECK([$MAKE clean], [], [ignore], [ignore])

AT_CLEANUP