ENV_CFLAGS=$CFLAGS

AC_PREREQ(2.59)
AC_INIT([Pacman package manager], 2.9.9, [pacman-dev@archlinux.org], pacman)
AC_LANG(C)
AM_CONFIG_HEADER(config.h)
AC_CANONICAL_SYSTEM
AM_INIT_AUTOMAKE

dnl Host dependant flags
case "${host}" in
	*-*-cygwin*)
		ENV_CFLAGS="$ENV_CFLAGS -DCYGWIN"
		;;
esac

dnl Define here the libalpm version number
PM_MAJOR_VERSION=0
PM_MINOR_VERSION=1
PM_MICRO_VERSION=0
PM_VERSION=$PM_MAJOR_VERSION.$PM_MINOR_VERSION.$PM_MICRO_VERSION$PM_MICRO_VERSION_SUFFIX
dnl Needed for libtool to create proper shared lib version
PM_VERSION_INFO=`expr $PM_MAJOR_VERSION + $PM_MINOR_VERSION`:$PM_MICRO_VERSION:$PM_MINOR_VERSION

AC_SUBST(PM_MAJOR_VERSION)
AC_SUBST(PM_MINOR_VERSION)
AC_SUBST(PM_MICRO_VERSION)
AC_SUBST(PM_VERSION)
AC_SUBST(PM_VERSION_INFO)

dnl Put out version numbers to config.h
AC_DEFINE_UNQUOTED([PM_VERSION], ["$PM_VERSION"], [libalpm version number])

AC_PROG_CC
AC_HEADER_STDC
AC_PROG_INSTALL
AC_CHECK_FUNCS([strverscmp])
AM_PROG_LIBTOOL

dnl Help line for man2html
AC_ARG_ENABLE(man2html,
    AC_HELP_STRING([--enable-man2html], [Build html docs via man2html]),
    [wantman2html=$enableval], [wantman2html=no])

dnl Help line for more-warnings
AC_ARG_ENABLE(more-warnings, 
    AC_HELP_STRING([--disable-more-warnings], [Minimum compiler warnings]),
    [set_more_warnings="${enableval}"], [warnings_default=yes])

dnl Help line for debug
AC_ARG_ENABLE(debug,
    AC_HELP_STRING([--disable-debug], [Disable debugging support]),
    [debug=$enableval], [debug=yes])

dnl Help line for fakeroot
AC_ARG_ENABLE(fakeroot,
    AC_HELP_STRING([--disable-fakeoot], [Disable fakeroot proof  support]),
    [fakeroot=$enableval], [fakeroot=yes])

dnl Help line for doxygen
AC_ARG_ENABLE(doxygen,
    AC_HELP_STRING([--disable-doxygen], [Build API docs via Doxygen]),
    [wantdoxygen=$enableval], [wantdoxygen=yes])

dnl Check for man2html binary
AC_MSG_CHECKING(for support man2html)
if test x$wantman2html = xyes ; then
    AC_CHECK_PROGS([MAN2HTML], [man2html] [man2html prog])
    AM_CONDITIONAL(HAS_MAN2HTML, test $MAN2HTML)
    if test $MAN2HTML ; then
        AC_DEFINE([HAS_MAN2HTML], [TRUE], [Enabled HTML generation from man via man2html])
	AC_MSG_RESULT(yes)
    else
        AC_DEFINE([HAS_MAN2HTML], [FALSE], [Disabled HTML generation from man via man2html])
	AC_MSG_RESULT(no, man2html missing)
    fi
else
    AM_CONDITIONAL(HAS_MAN2HTML, test $MAN2HTML)
    AC_DEFINE([HAS_MAN2HTML], [FALSE], [Not specified at configure line])
    AC_MSG_RESULT(not requested by configure)
fi

dnl Check for doxygen support
AC_MSG_CHECKING(for support Doxygen)
if test x$wantdoxygen = xyes ; then
    AC_CHECK_PROGS([DOXYGEN], [doxygen] [doxygen binary])
    AM_CONDITIONAL(HAS_DOXYGEN, test $DOXYGEN)
    if test $DOXYGEN ; then
        AC_DEFINE([HAS_DOXYGEN], [TRUE], [Enabled Doxygen Support])
	AC_MSG_RESULT(yes)
	DOXYSTATUS="yes, path: `which $DOXYGEN`"
    else
        AC_DEFINE([HAS_DOXYGEN], [FALSE], [Disabled Doxygen support])
	AC_MSG_RESULT(no, doxygen missing)
	DOXYSTATUS="doxygen binary not found"
    fi
else
    AM_CONDITIONAL(HAS_DOXYGEN, test $DOXYGEN)
    AC_DEFINE([HAS_DOXYGEN], [FALSE], [Not specified at configure line])
    AC_MSG_RESULT(not requested by configure)
    DOXYSTATUS="disabled by configure"
fi

dnl Enable or disable Warning FLAGS during compile
AC_MSG_CHECKING(for more compiler warnings)
if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
    AC_MSG_RESULT(yes)
    CFLAGS="-Wall -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes \
    -Wnested-externs -Wsign-compare"
    for option in -Wno-sign-compare; do
	SAVE_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $option"
	AC_MSG_CHECKING([whether gcc understands $option])
	AC_TRY_COMPILE([], [],
	    has_option=yes,
	    has_option=no,)
	    if test $has_option = no; then
		CFLAGS="$SAVE_CFLAGS"
	    fi
        AC_MSG_RESULT($has_option)
        unset has_option
        unset SAVE_CFLAGS
    done
    unset option
else
    AC_MSG_RESULT(no)
    unset CFLAGS
fi

dnl Enable or disable debug code (-g)
AC_MSG_CHECKING(for debug mode request)
if test x$debug = xyes ; then
    AC_DEFINE([PACMAN_DEBUG], [TRUE], [Enable debugging support])
    AM_CONDITIONAL(PACMAN_DEBUG, test x$debug = xyes)
    CFLAGS="$CFLAGS -g"
    AC_MSG_RESULT(yes)
else
    AC_DEFINE([PACMAN_DEBUG], [FALSE], [Disable debugging support])
    if test -z "$ENV_CFLAGS"; then
	ENV_CFLAGS="-O2"
    fi
    AC_MSG_RESULT(no)
fi

dnl Enable or disable fakeroot code
AC_MSG_CHECKING(for fakeroot proof support)
if test x$fakeroot = xyes ; then
	AC_MSG_RESULT(yes)
else
	CFLAGS="$CFLAGS -DFAKEROOT"
	AC_MSG_RESULT(no)
fi

dnl Check for zlib
AC_CHECK_LIB([z], [gzsetparams], [AC_CHECK_HEADER([zlib.h], [LIBZ='-lz'])])
if test -n "$LIBZ"; then
    LDFLAGS="$LDFLAGS $LIBZ"
fi

dnl Check for libtar
AC_CHECK_LIB([tar], [tar_open], [AC_CHECK_HEADER([libtar.h], [LIBTAR='-ltar'])])
if test -n "$LIBTAR"; then
    CFLAGS="$CFLAGS"
    LDFLAGS="$LDFLAGS $LIBTAR"
fi

CFLAGS="$CFLAGS $ENV_CFLAGS"

dnl ==========================================================================

AC_OUTPUT([
lib/libalpm/Makefile
lib/libftp/Makefile
src/pacman/Makefile
src/util/Makefile
scripts/Makefile
doc/Makefile
doc/makepkg.8
doc/pacman.8
doc/libalpm.3
Makefile
])

echo "
pacman-$VERSION:
                                                                                
        prefix:                   ${prefix}
        source code location:     ${srcdir}
        compiler:                 ${CC}
        compiler flags:           ${CFLAGS}
	libalpm version:          ${PM_VERSION}
                                                                                
	debug support:            ${debug}

	Doxygen support          : ${DOXYSTATUS}
"