How do I test for the need to link to boost::system?

[Paul Elliott]

Hello, I am Paul Elliott I am using the AX_BOOST_BASE macro.

My project links to libboost_regex and libboost_filesystem.

I recently found out that in boost version 36, (at least, I am not
sure about the exact cutoff point), I must also link to libboost_system.

boost::system came into existance with boost version 35.

I think the new include files for boost::filesystem also link boost::system.


I distribute to a number of distributions with different versions of
boost.

How do I test for the need to link to boost::system, and add code
that will link to it if needed?

Thank You.

FYI I include my configure.ac:
----------configure.ac
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.51)
 AC_INIT(peless, 1.156)
 AC_CONFIG_SRCDIR([peless.cc])
 AC_CONFIG_HEADER([config.h])
 AM_INIT_AUTOMAKE([dist-bzip2])

#required for internationalization
IT_PROG_INTLTOOL([0.35.0])

GETTEXT_PACKAGE=peless
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], ["$GETTEXT_PACKAGE"], [The domain to use 
with gettext])
AM_GLIB_GNU_GETTEXT

PELESS_LOCALEDIR=[${datadir}/locale]
AC_SUBST(PELESS_LOCALEDIR)

AC_ARG_WITH(dtcat,[ --with-dtcat=categories to use in peless.desktop],
        [PELESS_DTCAT=$with_dtcat],
        [PELESS_DTCAT='GTK;Utility;'])

AC_SUBST(PELESS_DTCAT)

# Checks for programs.
AC_PROG_CXX
AC_PROG_CC


AC_PROG_INSTALL

# Checks for libraries.

# Checks for header files.
AC_CHECK_HEADERS([libintl.h])


#find out of C functions gettext dgettext ect. exist
#this will define (or not) HAVE_GETTEXT, HAVE_DGETTEXT, in config.h
AC_CHECK_FUNCS(gettext dgettext dcgettext bindtextdomain textdomain)

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

# Checks for library functions.

# This gets info about gtkmm and puts it into vars
# DEPS_CFLAGS (compile time)
# DEPS_LIBS   (Link time)

PKG_CHECK_MODULES(DEPS, gtkmm-2.4 >= 2.4.0 gconfmm-2.6 >= 2.6.0)
#PKG_CHECK_MODULES(DEPS, gtkmm-2.0 >= 2.2.8)

#use boost. by default /usr /usr/local and /opt directories will be searched 
for boost
AX_BOOST_BASE([1.32.1])
#use the boost filesystem library
AX_BOOST_FILESYSTEM
#use the boost regex library.
AX_BOOST_REGEX


#make this data visible in Makefile.am
AC_SUBST(DEPS_CFLAGS)
AC_SUBST(DEPS_LIBS)



# require a makefile
# po/Makefile.in required for internationalization
# peless.desktop created in 2 steps substitutions in peless.desktop.in.in 
->peless.desktop.in
# internationalization peless.desktop.in -> peless.desktop
AC_OUTPUT(po/Makefile.in peless.desktop.in Makefile)



-- 
Paul Elliott                       1(512)837-1096
address@hidden                    PMB 181, 11900 Metric Blvd Suite J
http://www.io.com/~pelliott/pme/   Austin TX 78758-3117

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