Manual handling of arguments

[Olaf Lenz]

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Hello!

I'm experiencing some problems with autoconf 2.61. With autoconf 2.59,
everything was fine. I'm not sure whether this is a bug in the program
or just in the documentation.

Note that I'm not a member of the list, so please reply to me
personally. I've attached configure.ac, knowing that you can not process
it without the other relevant files.

In the script, I'm trying to use the arguments to the configure script
"$@" directly after AC_INIT was called. Unfortunately, with autoconf
2.61, it has already been altered (by some code concerning the
"config.site"-file). Therefore it is not possible anymore to do some
option processing manually.

In the info page "(autoconf)Initializing configure", it is stated:
======================================================
"If your `configure' script does its own option processing, it should
inspect `$@' or `$*' immediately after calling `AC_INIT', because other
Autoconf macros liberally use the `set' command to process strings, and
this has the side effect of updating `$@' and `$*'."
======================================================

I've also noticed that the variable "ac_configure_args" is defined and
contains a quoted version of the command line options. Is it better to
use that variable instead? If so, it should better be documented in the
info page, shouldn't it?

Best regards
        Olaf Lenz

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dnl Process this file with autoconf to produce a configure script.
dnl Fetch the version and timestamp from RELEASE_NOTES
m4_define([ESPRESSO_VERSION],
  [esyscmd([awk '/^\* /\
    { i=2; printf("%s", substr($i,2)); exit}'\
   RELEASE_NOTES]
  )])
m4_define([ESPRESSO_TIMESTAMP],
  [esyscmd([awk '/[(][a-z]*[)]/\
    { i=1; if ($i == "*") { next; }; for(i=2;i<NF;i++) printf("%s ",$i); 
gsub("[.]", "", $NF); printf $NF; exit}'\
   RELEASE_NOTES]
  )])

# Initialise autoconf
AC_INIT(ESPResSo, [ESPRESSO_VERSION], address@hidden)

# Test if we are in the source directory
AC_MSG_CHECKING([whether configure is running in the source directory])
if test "$srcdir" = "."; then
        objdir="obj-`config/config.guess`"
        AC_MSG_RESULT([yes])
        # create an objdir if necessary
        if test ! -d "$objdir"; then
                mkdir $objdir
        fi
        AC_MSG_NOTICE([Running configure in $objdir])
        # restart configure in the objdir
        cd $objdir
        ../configure --enable-chooser "$@"
        ec=$?
        cd ..
        exit $ec
else
        AC_MSG_RESULT(no)
fi

AC_PREREQ(2.50)
AC_CONFIG_SRCDIR([main.c])
AC_CONFIG_AUX_DIR(config)
AC_CONFIG_MACRO_DIR(config)
AC_PREFIX_DEFAULT($HOME/Espresso)
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

# Initialise automake
AM_INIT_AUTOMAKE([1.9 foreign subdir-objects])
AM_MAINTAINER_MODE
# Make the release notes a dependency of configure
AC_SUBST([CONFIGURE_DEPENDENCIES], ['$(top_srcdir)/RELEASE_NOTES'])

ES_KNOWN_CONFIGS

cat <<EOF
****************************************************************
*                   Check the compiler and MPI                 *
****************************************************************
EOF
dnl Save and restore CFLAGS to avoid unwanted "-g -O2"-flags
dnl Suggested improvement:
dnl - check --with-mpi: 
dnl     "no" => no MPI, 
dnl     "yes" => guess MPI, bail out if none is found
dnl     "auto" => guess MPI, continue with "no" if NONE is found
dnl     * => check for specific implementation, bail out if it doesn't work
dnl - from this compute "check_CC_list"
dnl - call AC_PROC_CC($check_CC_list)
dnl - now test for the other MPI components
dnl - set the value only when MPI is complete and working
AC_PROG_CPP
save_CFLAGS=$CFLAGS
AC_PROG_CC
AM_PROG_CC_C_O
CFLAGS=$save_CFLAGS
ES_CHECK_MPI
ES_CHECK_COMPILER

cat <<EOF
****************************************************************
*                          Check for programs                  *
****************************************************************
EOF

AC_PROG_AWK
AC_PROG_GREP
AC_PROG_EGREP
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PATH_PROG(DOXYGEN,doxygen,no)
AM_CONDITIONAL(HAVE_DOXYGEN,test .$DOXYGEN != .no)
AC_PATH_PROG(PDFLATEX,pdflatex,no)
AC_PATH_PROG(MAKEINDEX,makeindex,no)
AC_PATH_PROG(BIBTEX,bibtex,no)
AM_CONDITIONAL(HAVE_LATEX,test .$PDFLATEX != .no && test .$MAKEINDEX != .no && 
test .$BIBTEX != .no)

cat <<EOF
****************************************************************
*                   Check for headers and libraries            *
****************************************************************
EOF
# Checks for libraries.
ES_CHECK_EFENCE
ES_CHECK_TCL
ES_CHECK_TK
ES_CHECK_FFTW

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([arpa/inet.h fcntl.h float.h inttypes.h limits.h netdb.h\
 netinet/in.h stddef.h stdlib.h string.h strings.h sys/file.h sys/socket.h\
 sys/time.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_HEADER_TIME

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_FUNC_REALLOC
AC_FUNC_SELECT_ARGTYPES
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_FUNC_STRTOD
AC_CHECK_FUNCS([atexit floor getcwd gethostbyname memset pow rint select socket 
sqrt])

cat <<EOF
****************************************************************
*                   Other settings                             *
****************************************************************
EOF
ES_INIT_CHOOSER
ES_INIT_MYCONFIG
AC_DEFINE(LAST_CHANGE,["ESPRESSO_TIMESTAMP"],[When the last change to the code 
was done])
AC_ARG_VAR(LIBS,[use this to specify additional libraries to link against, e.g. 
-lmx])

cat <<EOF
****************************************************************
*                   Creating output files                      *
****************************************************************
EOF
# Creating the output
AC_CONFIG_HEADERS([acconfig.h])
AC_CONFIG_LINKS(Makefile:Makefile)
AC_CONFIG_FILES([
        Makefile-am scripts/Makefile testsuite/Makefile
        doc/Makefile doc/ug/Makefile doc/ug/figures/Makefile 
        doc/dg/Makefile
        config/$myconfig:config/myconfig-default.h.in
        chooser/Espresso mpiwrap/Espresso
        ])
AC_CONFIG_FILES([testsuite/test.sh],
        [chmod 755 testsuite/test.sh])
AC_CONFIG_FILES([Espresso],
        [chmod 755 Espresso])

AC_OUTPUT

cat <<EOF
****************************************************************
*                   Configuration summary                      *
****************************************************************
platform detected       = $target

Compiler settings:
------------------
MPI                     = $with_mpi
compiler                = $CC
linker                  = $LD
c compiler flags        = $CFLAGS
c preprocessor flags    = $CPPFLAGS
linker flags            = $LDFLAGS
libraries               = $LIBS
using debug flags       = $enable_debug
using profiling flags   = $enable_profiling
inline                  = $MDINLINE
EOF

if test .$with_mpi = .generic; then
   echo "WARNING: a generic MPI version may or may not work, look at the 
Espresso script in $builddir"
fi
if test "$issue_fake_warning"; then cat <<EOF
********************************************************************
* Could neither detect LAM nor MPICH nor a native MPI environment, *
* using the FAKE implementation for one processor only.            *
* If you have an MPI environment, please specify its type and      *
* the compiler or includes/libraries of your MPI implementation    *
* manually, or, even better, add your MPI environment to           * 
* config/mpi.m4                                                    *
********************************************************************
EOF
fi

cat <<EOF

Libraries:
----------
Tcl version             = $use_tcl
Tk version              = $use_tk
FFTW version            = $use_fftw
efence                  = $with_efence
EOF

if test .$use_tcl != .tcl8.5 && test .$use_tcl != .tcl8.4; then
   echo "WARNING: Not all supplied scripts work properly with Tcl version 
before 8.4, consider upgrading"
fi 

cat <<EOF

Other settings:
---------------
using Espresso chooser  = $enable_chooser
local config header     = $myconfig
pdflatex                = $PDFLATEX
makeindex               = $MAKEINDEX
bibtex                  = $BIBTEX
doxygen                 = $DOXYGEN
EOF

if test .$pdflatex = .no; then
   echo "To be able to rebuild the user's guide, add pdflatex to your PATH."
fi
if test .$makeindex = .no; then
   echo "To be able to rebuild the user's guide, add makeindex to your PATH."
fi
if test .$bibtex = .no; then
   echo "To be able to rebuild the user's guide, add bibtex to your PATH."
fi
if test .$doxygen = .no; then
   echo "To be able to build the developer's guide, add doxygen to your PATH."
fi