configure.ac

AC_PREREQ(2.53)
AC_CONFIG_MACRO_DIR([m4])
AC_INIT(piclone,0.5,http://raspberrypi.org/)
AM_INIT_AUTOMAKE([-Wall foreign subdir-objects no-dist-gzip dist-xz])
AC_CONFIG_HEADER([config.h])
AC_CONFIG_MACRO_DIR([m4])

# Support silent build rules. Disable by either passing --disable-silent-rules
# to configure or passing V=1 to make
AM_SILENT_RULES([yes])

# Force to dynamic
AC_DISABLE_STATIC

# Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
IT_PROG_INTLTOOL([0.40.0], [no-xml])
AM_PROG_CC_C_O
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])

#Initialize libtool
LT_PREREQ([2.2])
LT_INIT

# Checks for libraries.
pkg_modules="$pkg_modules gtk+-2.0 >= 2.18.0"

PKG_CHECK_MODULES(PACKAGE, [$pkg_modules])
AC_SUBST(PACKAGE_CFLAGS)
AC_SUBST(PACKAGE_LIBS)

pkg_modules="x11"
PKG_CHECK_MODULES(X11, [$pkg_modules])
AC_SUBST(X11_LIBS)

AC_ARG_ENABLE(more_warnings,
       [AC_HELP_STRING([--enable-more-warnings],
               [Add more warnings @<:@default=no@:>@])],
       [enable_more_warnings="${enableval}"],
       [enable_more_warnings=no]
)

if test x"$enable_more_warnings" = x"yes"; then
  ADDITIONAL_FLAGS="-Wall -Werror=all -Werror=format -Werror=implicit-function-declaration -Werror=implicit-int -Werror=missing-braces -Werror=parentheses -Werror=return-type -Werror=strict-aliasing -Werror=switch -Wuninitialized -Werror=unused-label -Werror=unused-value -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Werror=missing-declarations -Wredundant-decls -Wmissing-noreturn -Wpointer-arith -Wcast-align -Wwrite-strings -Werror=inline -Werror=format-nonliteral -Wformat-nonliteral -Werror=format-security -Wformat-security -Winit-self -Werror=missing-include-dirs -Werror=undef -Werror=aggregate-return -Wmissing-format-attribute -Werror=nested-externs -fno-strict-aliasing -fmessage-length=0 -Wp,-D_FORTIFY_SOURCE=2 -DG_DISABLE_DEPRECATED -DG_DISABLE_SINGLE_INCLUDES -DGDK_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_DEPRECATED -DGDK_PIXBUF_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_DEPRECATED -DGTK_DISABLE_SINGLE_INCLUDES"
fi
AC_SUBST(ADDITIONAL_FLAGS)

PACKAGE_CFLAGS="$PACKAGE_CFLAGS $ADDITIONAL_FLAGS"
PACKAGE_LIBS="$PACKAGE_LIBS"

dnl linker tweaking
# The function of the link flag --as-needed is to prevent unnecesary linking.
# Example: A -> B -> C
# Normally, A would link to B and also depend on C, this is of cource
# unnecesary. In this situation, however we do need to link to C, so this
# must be done explicitly. This flag comes in handy when a library ABI
# is changed, minimizing the amount of recompilations needed.
AC_MSG_CHECKING([whether $LD accepts --as-needed])
case `$LD --as-needed -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
    LDFLAGS="$LDFLAGS -Wl,--as-needed"
    AC_MSG_RESULT([yes])
    ;;
*)
    AC_MSG_RESULT([no])
    ;;
esac

dnl linker optimizations
AC_MSG_CHECKING([whether $LD accepts -O1])
case `$LD -O1 -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
  LDFLAGS="$LDFLAGS -Wl,-O1"
  AC_MSG_RESULT([yes])
  ;;
*)
  AC_MSG_RESULT([no])
  ;;
esac
AC_MSG_CHECKING([whether $LD accepts -Bsymbolic-functions])
case `$LD -Bsymbolic-functions -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
  LDFLAGS="$LDFLAGS -Wl,-Bsymbolic-functions"
  AC_MSG_RESULT([yes])
  ;;
*)
  AC_MSG_RESULT([no])
  ;;
esac
AC_MSG_CHECKING([whether $LD accepts --sort-common])
case `$LD --sort-common -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
  LDFLAGS="$LDFLAGS -Wl,--sort-common"
  AC_MSG_RESULT([yes])
  ;;
*)
  AC_MSG_RESULT([no])
  ;;
esac

dnl FIXME: filter for undefined symbols in plugins
# when passing "-z defs" to linker, we would better to make sure
# there are no undefined references.  However, we intend not to
# fix at the moment since we don't have spin-off libraray containing
# the necessary functions.
if test ! -z "$LDFLAGS"; then
    LDFLAGS=`echo "$LDFLAGS" | sed -e 's/-Wl,-z,defs//'`
fi

# Checks for header files.
AC_PATH_X
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([locale.h stdlib.h string.h sys/time.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_STRUCT_TM

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_STAT
AC_FUNC_STRFTIME
AC_CHECK_FUNCS([bzero memset mkdir setlocale strchr])

dnl check for menu-cache versions 0.4.x since no macro MENU_CACHE_CHECK_VERSION
dnl is available in those versions
LIBS_save="${LIBS}"
LIBS="${LIBS} ${MENU_CACHE_LIBS}"
AC_CHECK_FUNCS(menu_cache_dir_list_children)
LIBS="${LIBS_save}"

# Generate po/LINGUAS on the fly rather than relying on translators
# to maintain it manually. This also overcome the problem that Transifex
# cannot add a language to po/LINGUAS if a new po file is submitted.
rm -f $srcdir/po/LINGUAS
for po_file in `ls $srcdir/po/*.po | sort`;
do
    lang=`echo "$po_file" | sed "s|.*/po/\(.*\)\.po|\1|g"`
    echo $lang >> $srcdir/po/LINGUAS
done

GETTEXT_PACKAGE=piclone
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [Gettext package.])

AM_GLIB_GNU_GETTEXT

AC_ARG_ENABLE(debug,
    [AC_HELP_STRING([--enable-debug],
        [enable debug support @<:@default=no@:>@])],
    [enable_debug="${enableval}"],
    [enable_debug=no]
)
if test "$enable_debug" = "yes"; then
    # turn on debug and disable optimization
    CPPFLAGS="$CPPFLAGS -DG_ENABLE_DEBUG -O0 -g"
    case "$CC" in
    gcc*)
        CPPFLAGS="$CPPFLAGS -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration"
        ;;
    *)
        ;;
    esac
    dnl Be more strict on portability
    #CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200112L -D_XOPEN_SOURCE=700"
else
    # turn off glib debug checks
    CPPFLAGS="$CPPFLAGS -DG_DISABLE_ASSERT -DG_DISABLE_CHECKS -DG_DISABLE_CAST_CHECKS"
fi

dnl Fix invalid sysconfdir when --prefix=/usr
if test `eval "echo $sysconfdir"` = /usr/etc
then
    sysconfdir=/etc
fi

AC_CONFIG_FILES([
    Makefile
    src/Makefile
    data/Makefile
    po/Makefile.in
])
AC_OUTPUT

echo
echo piclone ......................... : Version $VERSION
echo
echo Prefix........................... : $prefix
echo System config directory.......... : `eval "echo $sysconfdir"`
echo

if test x"$sysconfdir" != x'/etc'; then
    echo
    echo 'Warning: sysconfdir is not /etc. It might be not what you want.'
    echo 'Please consider passing --sysconfdir=/etc to configure.'
fi