ref: b5b68e541c7164b5be892b3f56d2d2b2a2f511a2
dir: /common/id3lib/m4/lf_fortran.m4/
dnl Copyright (C) 1996 John W. Eaton <jwe@bevo.che.wisc.edu>
dnl Copyright (C) 1998 Eleftherios Gkioulekas <lf@amath.washington.edu>
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# The following set of macros will allow you to mix Fortran and C or C++
# in a portable manner. This work is based on the autoconf macros written
# by John W. Eaton for GNU Octave, which is also distributed under the
# terms of the GNU public license, but have been heavily modified by
# Eleftherios Gkioulekas, to make them more generally usable.
# The LF_PATH_F77_LIBS which is the most complicated part of this setup
# is exclusively the work of John Eaton, who has more experience with this
# stuff than I do. Look at newer versions of GNU Octave for improved versions
# of this macro.
# --------------------
# -- Acconfig stuff --
# --------------------
# These macros define the following symbols
dnl ACCONFIG TEMPLATE
dnl #undef F77_APPEND_UNDERSCORE
dnl #undef F77_UPPERCASE_NAMES
dnl END ACCONFIG
# Also, it is important that programs have access to the f77func macro
# which is defined as follows:
dnl ACCONFIG BOTTOM
dnl #ifndef f77func
dnl # if defined (F77_APPEND_UNDERSCORE)
dnl # if defined (F77_UPPERCASE_NAMES)
dnl # define f77func(f, F) F##_
dnl # else
dnl # define f77func(f, F) f##_
dnl # endif
dnl # else
dnl # if defined (F77_UPPERCASE_NAMES)
dnl # define f77func(f, F) F
dnl # else
dnl # define f77func(f, F) f
dnl # endif
dnl # endif
dnl #endif
dnl END ACCONFIG
# -------------------------------------------------------------------------
# This macro specifies that we want to prefer the proprietary compiler
# if one is available. The default is to prefer the GNU compilers.
# -------------------------------------------------------------------------
AC_DEFUN(LF_PROG_F77_PREFER_NATIVE_VERSION,[
lf_f77_prefer_native_version="yes"
])
# -------------------------------------------------------------------------
# This macro specifies that we want to prefer an f2c compatible compiler
# if possible.
# -------------------------------------------------------------------------
AC_DEFUN(LF_PROG_F77_PREFER_F2C_COMPATIBILITY,[
lf_f77_prefer_native_version="no"
])
# -------------------------------------------------------------------------
# This is the macro that you want to call if you want to use Fortran.
# This macro sets F77 equal to a valid Fortran compiler and FFLAGS
# to a set of flags to pass to that compiler.
# Three options are considered:
# 1) The GNU g77 compiler
# 2) The f2c translator
# 3) The proprietary compiler
# -------------------------------------------------------------------------
AC_DEFUN(LF_PROG_F77,[
dnl Initialize the following use variables to false
dnl These variables indicate which compiler we want to use
lf_f77_use_f2c=false
lf_f77_use_g77=false
lf_f77_use_f77=false
dnl These variable indicates whether we want to build the f2c compiler
lf_f2c_build_local_copy=false
dnl Allow the user to force the use of the compiler of his choice
AC_ARG_WITH(f2c,
[ --with-f2c use f2c even if Fortran compiler is available],
[ if test "$withval" = no
then
lf_f77_use_f2c=false
else
lf_f77_use_f2c=true
fi ],
[ lf_f77_use_f2c=false ])
AC_ARG_WITH(g77,
[ --with-g77 use g77 to compile Fortran subroutines],
[ if test "$withval" = no
then
lf_f77_use_g77=false
else
lf_f77_use_g77=true
fi ],
[ lf_f77_use_g77=false ])
AC_ARG_WITH(f77,
[ --with-f77 use f77 to compile Fortran subroutines],
[ if test "$withval" = no
then
lf_f77_use_f77=false
else
lf_f77_use_f77=true
fi ],
[ lf_f77_use_f77=false ])
dnl Make sure that only one of the above options for Fortran compilers
dnl was specified (multiple "no" or --without-FOO options are ok).
dnl FIXME: still todo
dnl
dnl Now assign F77 with the appropriate Fortran compiler
dnl
dnl Check whether there have been any --with options overriding the
dnl default behaviour
if test "$lf_f77_use_f77" = true
then
if test "$with_f77" = yes
then
F77=f77
else
F77="$with_f77"
fi
AC_MSG_RESULT([defining F77 to be $F77])
elif test "$lf_f77_use_g77" = true
then
if test "$with_g77" = yes
then
F77=g77
else
F77="$with_g77"
fi
AC_MSG_RESULT([defining F77 to be $F77])
elif test "$lf_f77_use_f2c" = true
then
LF_PROG_F2C
dnl If we are not overriding the default behaviour then go
dnl ahead with the default behaviour
else
dnl Take into account whether we have a preference for a native
dnl version or the GNU version.
lf_f77_native_compiler_list="f77 f90 xlf cf77 fc"
if test "$lf_f77_prefer_native_version" = yes
then
AC_CHECK_PROGS(F77, [ $lf_f77_native_compiler_list g77 ], f2c)
else
AC_CHECK_PROGS(F77, [ g77 $lf_f77_native_compiler_list ], f2c)
fi
dnl Now update the variables lf_f77_use_[f77|g77|f2c] with the result
dnl of the behaviour up until now so that we can study and finalize this
dnl decision later
if test "$F77" = f2c
then
lf_f77_use_f2c=true
elif test "$F77" = g77
then
lf_f77_use_g77=true
else
lf_f77_use_f77=true
fi
dnl If we couldn't find a native or GNU Fortran compiler, then F77
dnl will be assigned a temporary value of 'f2c'. In this case, invoke
dnl the LF_PROG_F2C macro to get a more permanent assignment to F77.
if test "$F77" = f2c
then
LF_PROG_F2C
fi
fi
dnl One last paranoid check. It's possible that we're using the GNU Fortran
dnl compiler, under a name other than 'g77'. For example, perhaps the
dnl sysadmin symlinked it with 'f77' or something. So one last check to be
dnl sure
LF_PROG_F77_IS_G77
if test "$f77_is_g77" = true
then
lf_f77_use_f77=false
lf_f77_use_f2c=false
lf_f77_use_g77=true
fi
dnl At this point we have a correct representation of what kind of
dnl compiler we selected. Now we must confirm the decision.
dnl 1. If we have already decided to use f2c, there is nothing to confirm.
dnl This is the most portable way to do it.
dnl 2. If we are using g77 then just run the canonical additional tests that
dnl are needed.
dnl 3. If we are using f77 then we need to think about it more and perhaps
dnl reconsider if f2c compatibility is desired.
if test "$lf_f77_use_g77" = true
then
LF_PROG_NM
LF_PATH_F77_LIBS
LF_CHECK_F77_APPEND_UNDERSCORE
LF_CHECK_F77_UPPERCASE_NAMES
elif test "$lf_f77_use_f77" = true
then
LF_PROG_NM
LF_PATH_F77_LIBS
LF_CHECK_F77_APPEND_UNDERSCORE
LF_CHECK_F77_UPPERCASE_NAMES
LF_F77_IS_F2C_COMPATIBLE
dnl Now decide whether to really use this compiler or not
AC_MSG_CHECKING([whether to use the native compiler])
if test "$lf_f77_is_f2c_compatible" = no
then
if test "$lf_f77_prefer_native_version" = no ||
test -n "$lf_f77_prefer_native_version"
then
AC_MSG_RESULT(no)
dnl FIXME: Think! Do I need to check for g77 right here?
LF_PROG_F2C
fi
else
AC_MSG_RESULT(yes)
fi
fi
dnl Signal to Automake whether we want to build the locally distributed
dnl version of the f2c compiler
AM_CONDITIONAL(USE_F2C,test x$lf_f2c_build_local_copy = xtrue)
dnl By default, compile Fortran with optimization
FFLAGS="-O2"
dnl Export F77 and FLAGS to Automake
AC_SUBST(F77)
AC_SUBST(FFLAGS)
])
# --------------------------------------------------------------------------
# This macro checks whether the f2c translator is available. If not
# it checks whether the package has included a copy of the f2c oompiler.
# By default if there is a widely installed f2c it is prefered. Otherwise
# we prefer the locally distributed f2c. The --with-local-f2c flag will
# force the locally distributed f2c to be used, if there is a problem with
# the widely distributed one.
# -lF77 -lI77
# --------------------------------------------------------------------------
AC_DEFUN(LF_PROG_F2C,[
dnl No matter what happens next, we want to link in the math libraries
dnl Late night fart: Mount, mount, mount...mount the dump tape please.
FLIBS=""
AC_CHECK_LIB(m, sin, [ FLIBS="-lm $FLIBS"])
AC_CHECK_LIB(ieee, main, [ FLIBS="-lieee $FLIBS"])
dnl Check whether we have an installed version of 'f2c'
AC_PATH_PROGS(F2C, f2c F2C, nope)
dnl If we do have an installed version of 'f2c' check whether we also
dnl have a copy of the libraries.
dnl The first snug is that in order to link the f2c libraries, on many
dnl systems it is necessary to link in the symbols MAIN_ and MAIN__ on
dnl which the libraries depend on. So, we need to make a one-night-stand
dnl such library on the spot.
rm -f conflib.a conftest.o conftest.c
cat > conftest.c << EOF
int MAIN_ () { return 0; }
int MAIN__() { return 0; }
EOF
$CC $CFLAGS -c conftest.c 2>&1 1>&AC_FD_CC
ar rcu libconflib.a conftest.o 2>&1 1>&AC_FD_CC
if test -n "$RANLIB"
then
$RANLIB libconflib.a 2>&1 1>&AC_FD_CC
fi
dnl Now, the byzantine test for the f2c libraries.
dnl We need to check
dnl 1. The -lf2c -lieee -lm sequence
dnl 2. The -lF77 -lI77 -lieee -lm sequence
dnl 3. Flag that the libraries are not available, if we can't find them
lf_f2c_have_libf2c=false
lf_f2c_have_libF77=false
lf_f2c_have_libI77=false
AC_CHECK_LIB(f2c, f_open, [ lf_f2c_have_libf2c=true ],
[ lf_f2c_have_libf2c=false],
[ -L. -lconflib $FLIBS ])
if test "$lf_f2c_have_libf2c" = false
then
AC_CHECK_LIB(F77, d_sin, [ lf_f2c_have_libF77=true ],
[ lf_f2c_have_libF77=false ],
[ -L. -lconflib $FLIBS -lm ])
AC_CHECK_LIB(I77, f_rew, [ lf_f2c_have_libI77=true ],
[ lf_f2c_have_libI77=false ],
[ -L. -lconflib -lF77 $FLIBS ])
fi
rm -f libconflib.a conftest.o conftest.c
dnl Now determine whether we have a complete set of libraries
dnl If we do, then assign FLIBS and flag what type of libraries we have
lf_f2c_have_libraries=no
if test "$lf_f2c_have_libf2c" = true
then
lf_f2c_have_libraries=yes
FLIBS="-lf2c $FLIBS"
else
if test "$lf_f2c_have_libI77" = true && test "$lf_f2c_have_libF77" = true
then
lf_f2c_have_libraries=yes
FLIBS="-lF77 -lI77 $FLIBS"
fi
fi
dnl Now check whether we need to compile our own f2c
AC_MSG_CHECKING([whether to use local copy of f2c])
if test "$F2C" = nope || test "$lf_f2c_have_libraries" = no
then
dnl If yes, then check if there is a local copy present
if test -d fortran && test -d fortran/f2c && test -d fortran/libf2c
then
dnl If we do have a local copy present then use it
lf_f2c_build_local_copy=true
F2C="`pwd`/fortran/f2c/f2c"
FLIBS="`pwd`/fortran/libf2c/libf2c.a $FLIBS"
AC_MSG_RESULT(yes)
else
AC_MSG_ERROR([want local version of f2c, but one is not available.])
fi
else
dnl If no, then don't bother compiling the local copy
AC_MSG_RESULT(no)
fi
dnl We want to use the following flags on F2C
F2CFLAGS="-f -g -A"
dnl Export the F2C and F2CFLAGS variables to the f2c_comp script
AC_SUBST(F2C)
AC_SUBST(F2CFLAGS)
dnl Export the F77 and FFLAGS symbols to Automake
F77='$(SHELL) $(top_builddir)/f2c_comp'
FFLAGS=""
AC_SUBST(F77)
AC_SUBST(FFLAGS)
AC_SUBST(FLIBS)
dnl The f2c compiler appends underscores but does not use uppercase
dnl letters. We can not invoke a direct test because the compiler may
dnl not exist yet. Plus, there's no need to.
AC_DEFINE(F77_APPEND_UNDERSCORE,1)
])
# ---------------------------------------------------------------------------
# THIS macro tests whether the compiler assigned to F77 is the GNU g77
# compiler. If this is the gnu compiler, then set f77_is_g77 equal to "true".
# Otherwise, it is set to be an empty string.
# ---------------------------------------------------------------------------
AC_DEFUN(LF_PROG_F77_IS_G77,[
AC_MSG_CHECKING([whether we are using GNU Fortran])
if AC_TRY_COMMAND([$F77 --version]) | egrep 'GNU Fortran' >/dev/null 2>&1
then
f77_is_g77=yes
else
f77_is_g77=no
fi
AC_MSG_RESULT([$f77_is_g77])
])
# -------------------------------------------------------------------------
# Check whether the Fortran compiler uses uppercase external names.
# If it does, then we define the macro F77_UPPERCASE_NAMES
# Requires maybe the NM variable to be set to the nm program?
# -------------------------------------------------------------------------
AC_DEFUN(LF_CHECK_F77_UPPERCASE_NAMES,[
AC_MSG_CHECKING([whether $F77 uses uppercase external names])
lf_cv_f77_uppercase_names=no
cat > conftest.f <<EOF
SUBROUTINE XXYYZZ
RETURN
END
EOF
if ${F77-f77} -c conftest.f 1>&AC_FD_CC 2>&AC_FD_CC; then
if test "`$NM conftest.o | grep XXYYZZ`" != ""; then
lf_cv_f77_uppercase_names=yes
fi
fi
AC_MSG_RESULT([$lf_cv_f77_uppercase_names])
if test "$lf_cv_f77_uppercase_names" = yes; then
AC_DEFINE(F77_UPPERCASE_NAMES,1)
fi
rm -f conftest.f
])
AC_DEFUN(LF_CHECK_F77_APPEND_UNDERSCORE,[
AC_MSG_CHECKING([whether $F77 appends underscores to external names])
lf_cv_f77_append_underscore=no
cat > conftest.f <<EOF
SUBROUTINE XXYYZZ
RETURN
END
EOF
if ${F77-f77} -c conftest.f 1>&AC_FD_CC 2>&AC_FD_CC; then
if test "$lf_cv_f77_uppercase_names" = yes; then
if test "`${NM} conftest.o | grep XXYYZZ_`" != ""; then
lf_cv_f77_append_underscore=yes
fi
else
if test "`${NM} conftest.o | grep xxyyzz_`" != ""; then
lf_cv_f77_append_underscore=yes
fi
fi
fi
AC_MSG_RESULT([$lf_cv_f77_append_underscore])
if test "$lf_cv_f77_append_underscore" = yes; then
AC_DEFINE(F77_APPEND_UNDERSCORE, 1)
fi
rm -f conftest.f
])
# -------------------------------------------------------------------------
# This macro tests whether the compiler assigned to F77 is f2c compatible.
# The answer; "yes" or "no" is stored in lf_f77_is_f2c_compatible
# -------------------------------------------------------------------------
AC_DEFUN(LF_F77_IS_F2C_COMPATIBLE,[
AC_MSG_CHECKING([whether $F77 is f2c compatible])
trap 'rm -f ftest* ctest* core; exit 1' 1 3 15
lf_f77_is_f2c_compatible=no
cat > ftest.f <<EOF
INTEGER FUNCTION FORSUB (C, D)
CHARACTER *(*) C
INTEGER L
DOUBLE PRECISION D
L = LEN (C)
WRITE (*, '(A,1X,I2)') C(1:L), INT (D)
FORSUB = 1
RETURN
END
EOF
${F77-f77} -c ftest.f 1>&AC_FD_CC 2>&AC_FD_CC
changequote(, )dnl
cat > ctest.c <<EOF
#include "confdefs.h"
static char s[14];
int main ()
{
double d = 10.0;
int len;
strcpy (s, "FOO-I-HITHERE");
len = strlen (s);
#ifdef F77_APPEND_UNDERSCORE
return (! forsub_ (s, &d, len));
#else
return (! forsub (s, &d, len));
#endif
}
#if defined (sun)
int MAIN_ () { return 0; }
#elif defined (linux) && defined (__ELF__)
int MAIN__ () { return 0; }
#endif
EOF
changequote([, ])
if ${CC-cc} -c ctest.c 1>&AC_FD_CC 2>&AC_FD_CC; then
if ${CC-cc} -o ctest ctest.o ftest.o $FLIBS -lm 1>&AC_FD_CC 2>&AC_FD_CC; then
ctest_output=`./ctest 2>&1`
status=$?
if test $status -eq 0 && test "$ctest_output" = "FOO-I-HITHERE 10"; then
lf_f77_is_f2c_compatible=yes
fi
fi
fi
rm -f ftest* ctest* core
AC_MSG_RESULT($lf_f77_is_f2c_compatible)
])
# --------------------------------------------------------------------------
# See what libraries are used by the Fortran compiler
# Write a minimal program and compiler it with -v. I don't know what to
# do if your compiler doesn't have -v
# You must call LF_HOST_TYPE before calling this macro.
# The result is returned in the variable FLIBS which is made
# available in Makefile.am
# ALSO: requires ac_cv_prog_gcc
# --------------------------------------------------------------------------
AC_DEFUN(LF_PATH_F77_LIBS,[
AC_MSG_CHECKING(for Fortran libraries)
dnl
dnl Write a minimal program and compile it with -v. I don't know
dnl what to do if your compiler doesn't have -v
dnl
changequote(, )dnl
echo " END" > conftest.f
foutput=`${F77-f77} -v -o conftest conftest.f 2>&1`
dnl
dnl The easiest thing to do for xlf output is to replace all the commas
dnl with spaces. Try to only do that if the output is really from xlf,
dnl since doing that causes problems on other systems.
dnl
xlf_p=`echo $foutput | grep xlfentry`
if test -n "$xlf_p"; then
foutput=`echo $foutput | sed 's/,/ /g'`
fi
dnl
ld_run_path=`echo $foutput | \
sed -n -e 's/^.*LD_RUN_PATH *= *\([^ ]*\).*/\1/p'`
dnl
dnl We are only supposed to find this on Solaris systems...
dnl Uh, the run path should be absolute, shouldn't it?
dnl
case "$ld_run_path" in
/*)
if test "$ac_cv_prog_gcc" = yes; then
ld_run_path="-Xlinker -R -Xlinker $ld_run_path"
else
ld_run_path="-R $ld_run_path"
fi
;;
*)
ld_run_path=
;;
esac
dnl
flibs=
lflags=
dnl
dnl If want_arg is set, we know we want the arg to be added to the list,
dnl so we don't have to examine it.
dnl
want_arg=
dnl
for arg in $foutput; do
old_want_arg=$want_arg
want_arg=
dnl
dnl None of the options that take arguments expect the argument to
dnl start with a -, so pretend we didn't see anything special.
dnl
if test -n "$old_want_arg"; then
case "$arg" in
-*)
old_want_arg=
;;
esac
fi
case "$old_want_arg" in
'')
case $arg in
/*.a)
exists=false
for f in $lflags; do
if test x$arg = x$f; then
exists=true
fi
done
if $exists; then
arg=
else
lflags="$lflags $arg"
fi
;;
-bI:*)
exists=false
for f in $lflags; do
if test x$arg = x$f; then
exists=true
fi
done
if $exists; then
arg=
else
if test "$ac_cv_prog_gcc" = yes; then
lflags="$lflags -Xlinker $arg"
else
lflags="$lflags $arg"
fi
fi
;;
-lang* | -lcrt0.o | -lc | -lgcc)
arg=
;;
-[lLR])
want_arg=$arg
arg=
;;
-[lLR]*)
exists=false
for f in $lflags; do
if test x$arg = x$f; then
exists=true
fi
done
if $exists; then
arg=
else
case "$arg" in
-lkernel32)
case "$canonical_host_type" in
*-*-cygwin32)
;;
*)
lflags="$lflags $arg"
;;
esac
;;
-lm)
;;
*)
lflags="$lflags $arg"
;;
esac
fi
;;
-u)
want_arg=$arg
arg=
;;
-Y)
want_arg=$arg
arg=
;;
*)
arg=
;;
esac
;;
-[lLR])
arg="$old_want_arg $arg"
;;
-u)
arg="-u $arg"
;;
-Y)
dnl
dnl Should probably try to ensure unique directory options here too.
dnl This probably only applies to Solaris systems, and then will only
dnl work with gcc...
dnl
arg=`echo $arg | sed -e 's%^P,%%'`
SAVE_IFS=$IFS
IFS=:
list=
for elt in $arg; do
list="$list -L$elt"
done
IFS=$SAVE_IFS
arg="$list"
;;
esac
dnl
if test -n "$arg"; then
flibs="$flibs $arg"
fi
done
if test -n "$ld_run_path"; then
flibs_result="$ld_run_path $flibs"
else
flibs_result="$flibs"
fi
changequote([, ])dnl
rm -f conftest.f conftest.o conftest
dnl
dnl Phew! Done! Now, output the result
dnl
FLIBS="$flibs_result"
AC_MSG_RESULT([$FLIBS])
AC_SUBST(FLIBS)
])