source: trunk/configure.ac @ 672

## Process this file with autoconf to produce a configure script.
##
## $Id: configure.ac 672 2008-07-07 14:31:12Z peter $
##
## If you grabbed the source from subversion you should, at top-level,
## execute:
##          ./bootstrap
## To push subsequent changes of this file into the build scripts you
## must issue:
##          autoreconf

# Copyright (C) 2005 Jari Häkkinen, Peter Johansson
# Copyright (C) 2006 Jari Häkkinen
# Copyright (C) 2007, 2008 Jari Häkkinen, Peter Johansson
#
# This file is part of svndigest, http://trac.thep.lu.se/svndigest
#
# svndigest 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 2 of the License, or
# (at your option) any later version.
#
# svndigest 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

AC_PREREQ(2.60)


m4_include([./build_support/version.m4])
AC_INIT([svndigest],[SVNDIGEST_VERSION],[jari@thep.lu.se])
AC_CONFIG_SRCDIR([lib/File.h])
AC_CONFIG_AUX_DIR([autotools])
AC_PREFIX_DEFAULT([/usr/local])
test $prefix = NONE && prefix=/usr/local

AC_SUBST([SVNDIGEST_MAJOR_VERSION], [MAJOR_VERSION])
AC_SUBST([SVNDIGEST_MINOR_VERSION], [MINOR_VERSION])
AC_SUBST([SVNDIGEST_PATCH_VERSION], [PATCH_VERSION])

AC_DEFINE([DEV_BUILD],[SVNDIGEST_DEV_BUILD], 
          [true if dev build (version starts with pre)])
AC_DEFINE([VERSION_MAJOR], [SVNDIGEST_MAJOR_VERSION], 
                    [Define to the svndigest major version])
AC_DEFINE([VERSION_MINOR], [SVNDIGEST_MINOR_VERSION],
                    [Define to the svndigest minor version])
AC_DEFINE([VERSION_PATCH], [SVNDIGEST_PATCH_VERSION],
                    [Define to the svndigest patch version])

AC_CONFIG_HEADER([config.h])
AM_INIT_AUTOMAKE([std-options check-news])

# seems like these variables are not set with older autoconf(?)
AC_SUBST([abs_srcdir], ["`cd $srcdir && pwd`"])
AC_SUBST([abs_builddir], ["`pwd`"])

# Set default programming language
AC_LANG(C++)

# Let user overide default CXXFLAGS
if test "${CXXFLAGS+set}" != set; then
  CXXFLAGS=""  # Setting CXXFLAGS here to prevent expansion in AC_PROG_CXX
fi
# Checks for programs.
AC_PROG_CXXCPP
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_SED
AC_CHECK_PROG([GNUPLOT],[gnuplot],[ok])

# Save FLAGS
SAVE_CPPFLAGS="$CPPFLAGS"
SAVE_CXXFLAGS="$CXXFLAGS"
SAVE_LDFLAGS="$LDFLAGS"
SAVE_LIBS="$LIBS"

# -Wno-long-long is needed to suppress compiler diagnostics regarding
# using extension beyond the C++ standard (usage of non C++ standard
# 'long long' types).
SD_CXXFLAGS="$SD_CXXFLAGS-Wall -pedantic -Wno-long-long"
AC_TYPE_LONG_LONG_INT()

AC_ARG_ENABLE(debug,
  [AS_HELP_STRING([--enable-debug],[turn on debug options and code])],
  [SD_CXXFLAGS="$SD_CXXFLAGS -g -O"], 
  [SD_CPPFLAGS="-DNDEBUG" SD_CXXFLAGS="$SD_CXXFLAGS -O3"])

# Apache Portable Runtime (APR) API checks
# The next three lines are not needed as long as APR_FIND_APR is used.
# AC_ARG_WITH(apr,
#  [  --with-apr=DIR          prefix for installed APR or path to APR build
#                          tree [[PREFIX]]])
# Include APR_FIND_APR macro distributed within the APR project. If
# the usage of the APR macro is to be omitted then the construct for
# setting the CXXFLAGS (header file location) and LDFLAGS (linking
# informaion) for APR must be changed. The latter can be achieved with
# AC_SEARCH_LIBS([apr_allocator_create],[apr-0],,apr_found="no") but
# apr-0 must be prior knowledge.
m4_sinclude(./build_support/find_apr.m4)
APR_FIND_APR(,,1,[1 0])
if test "$apr_found" = "yes" ; then
    SD_LDFLAGS="`$apr_config --link-ld` $SD_LDFLAGS"
    SD_CPPFLAGS="`$apr_config --includes --cppflags` $SD_CPPFLAGS"
fi

# Subversion API checks
svn_found="yes"
AC_ARG_WITH(svn,
  [AS_HELP_STRING([--with-svn=DIR],[prefix for svn developer files [[PREFIX]]])],
  [ SD_LDFLAGS="-L$withval/lib $SD_LDFLAGS" 
    SD_CPPFLAGS="-I$withval/include $SD_CPPFLAGS"])


# Use SD_*FLAGS in tests
CPPFLAGS="$SD_CPPFLAGS $CPPFLAGS"
CXXFLAGS="$SD_CXXFLAGS $CXXFLAGS"
LDFLAGS="$SD_LDFLAGS $LDFLAGS"
LIBS="$SD_LIBS $LIBS"

AC_CHECK_HEADER([apr_allocator.h],,apr_found="no")
AC_CHECK_HEADER([subversion-1/svn_types.h],,svn_found="no")
AC_SEARCH_LIBS([svn_cmdline_setup_auth_baton],[svn_subr-1],
               [SD_LIBS="-lsvn_subr-1 $SD_LIBS"],svn_found="no")
AC_SEARCH_LIBS([svn_ra_initialize],[svn_ra-1],
               [SD_LIBS="-lsvn_ra-1 $SD_LIBS"],svn_found="no")
AC_SEARCH_LIBS([svn_wc_adm_open3],[svn_wc-1],
               [SD_LIBS="-lsvn_wc-1 $SD_LIBS"],svn_found="no")
AC_SEARCH_LIBS([svn_diff_file_options_create],[svn_diff-1],
               [SD_LIBS="-lsvn_diff-1 $SD_LIBS"],svn_found="no")
AC_SEARCH_LIBS([svn_client_log3],[svn_client-1],
               [SD_LIBS="-lsvn_client-1 $SD_LIBS"],svn_found="no")

# Export flags
AC_SUBST([SVNDIGEST_CPPFLAGS], $SD_CPPFLAGS)
AC_SUBST([SVNDIGEST_CXXFLAGS], $SD_CXXFLAGS)
AC_SUBST([SVNDIGEST_LDFLAGS], $SD_LDFLAGS)
AC_SUBST([SVNDIGEST_LIBS], $SD_LIBS)

# Reset FLAGS
CPPFLAGS="$SAVE_CPPFLAGS"
CXXFLAGS="$SAVE_CXXFLAGS"
LDFLAGS="$SAVE_LDFLAGS"
LIBS="$SAVE_LIBS"

# check if svnversion is installed
have_svnversion="yes"
AC_PATH_PROG(SVNVERSION, svnversion, have_svnversion="no")

# checking if we build in a subversion WC
wc_found="no";
if (test $have_svnversion != "no" && 
  test `$SVNVERSION -n $srcdir` != "exported"); 
then
  wc_found="yes";
fi
AC_CHECK_FILE("$srcdir/lib/subversion_info.cc",info_found="yes",info_found="no")

# checking that DEV_BUILD is set to false at time of release
# Failure should be captured by distcheck
if (test "$wc_found" = "no" && test "$SVNDIGEST_DEV_BUILD" = "true") ; then
  AC_MSG_ERROR([Incorrect version: 
               [SVNDIGEST_DEV_BUILD] is set to SVNDIGEST_DEV_BUILD. 
         [SVNDIGEST_DEV_BUILD] should be set to false at time of release. 
               Please, update version.m4.])
fi


# devel version should have svn WC and SVNVERSION installed
AM_CONDITIONAL(HAVE_SVN_WC, test "$wc_found" = "yes" )


AC_CONFIG_FILES([Makefile
                bin/Makefile
                lib/Makefile
                test/environment.h
                test/Makefile])

# Print failure status information about selected items, and exit if
# fatal errors were encountered. No output will be created if
# configure is halted prematurely.

# used to trigger exit before creation of output
all_reqs_ok="true"

if (test "$wc_found" != "yes") ; then
if (test "$info_found" = "no") ; then
   AC_MSG_WARN([Cannot find sources (lib/subversion_info.cc).])
   if (test "$svnversion" = "no") ; then
     AC_MSG_WARN([If you grabbed the source from the subversion repository, 
     the file will be generated automatically. However, svnversion cannot 
     be found and therefore the file cannot be generated. Please install 
     svnversion and make sure it is in your search path.])
   else
     AC_MSG_WARN([If you grabbed the source from the subversion repository, 
     the file will be generated automatically. However, the output from 
     svnversion was incorrect. Either your installation of svnversion is 
     is not healthy or there is something wrong with the repository.])
   fi
   all_reqs_ok="false"
fi
else
  dnl test repo is not distributed
  AC_CONFIG_FILES([test/test_repo.sh], [chmod +x test/test_repo.sh])
  AC_CONFIG_FILES([test/check_repo_status.sh], [chmod +x test/check_repo_status.sh])   
fi

# Non-existing APR is fatal -- sub-sequent compilation will fail.
if (test "$apr_found" = "no") ; then
  AC_MSG_WARN([APR not found. The Apache Portable Runtime
  (APR) library cannot be found. Please make sure APR is installed
  and supply the appropriate --with-apr option to 'configure'.])
  all_reqs_ok="false"
fi

# Non-existing subversion API is fatal -- sub-sequent compilation will fail.
if (test "$svn_found" = "no") ; then
  svn_msg="Subversion API not found. Subversion API libraries cannot
  be found. Make sure the APIs are installed and supply the
  appropriate --with-svn option to 'configure'."
  if (test "$apr_found" = "no") ; then
    svn_msg="$svn_msg
    Note, APR was not found. Failure to locate APR affects the search
    of the subversion API. Please fix the APR problem before trying
    to resolve the subversion related issues."
  fi
  AC_MSG_WARN([$svn_msg])
  all_reqs_ok="false"
fi

if test $ac_cv_type_long_long_int != yes ; then
  AC_MSG_WARN([Compiler $CXX does not support `long long'.
  svndigest must be compiled with a compiler that supports `long long'.])
  all_reqs_ok="false"
fi

if (test "$all_reqs_ok" = "false") ; then
  AC_MSG_ERROR([Some pre-requisites were not fulfilled, aborting
  configure. Please consult the 'README' file for more information
  about what is needed to compile svndigest and refer to above
  warning messages. Needed files were NOT created.])
fi

# Create output.
AC_OUTPUT

# Some more messages.
AC_MSG_NOTICE([])
AC_MSG_NOTICE([   Ready to compile the executables of svndigest $VERSION])
AC_MSG_NOTICE([   The following flags and libs will be used:])
AC_MSG_NOTICE([   +++++++++++++++++++++++++++++++++++++++++++++++])
AC_MSG_NOTICE([    Compiler:           $CXX])
AC_MSG_NOTICE([    Preprocessor flags: $SD_CPPFLAGS $CPPFLAGS])
AC_MSG_NOTICE([    C++ flags:          $SD_CXXFLAGS $CXXFLAGS])
AC_MSG_NOTICE([    Linker flags:       $SD_LDFLAGS $LDFLAGS])
AC_MSG_NOTICE([    LIBS:               $SD_LIBS $LIBS])
AC_MSG_NOTICE([   +++++++++++++++++++++++++++++++++++++++++++++++])
AC_MSG_NOTICE([])

# Failure to locate gnuplot is not considered fatal
if (test "$GNUPLOT" != "ok") ; then
  AC_MSG_WARN([Gnuplot was not found. svndigest will compile
  without gnuplot but will throw an exception at run-time. Please
  install gnuplot (available for a wide range of operating systems
  at http://www.gnuplot.info).])
  AC_MSG_NOTICE([])
fi

AC_MSG_NOTICE([Now type 'make ; make check'.])