dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.

dnl Set the MOZ_ICU_VERSION variable to denote the current version of the
dnl ICU library, as well as a few other things.

AC_DEFUN([MOZ_CONFIG_ICU], [

MOZ_SYSTEM_ICU=
MOZ_ARG_WITH_BOOL(system-icu,
[  --with-system-icu
                          Use system ICU (located with pkgconfig)],
    MOZ_SYSTEM_ICU=1)

if test -n "$MOZ_SYSTEM_ICU"; then
    PKG_CHECK_MODULES(MOZ_ICU, icu-i18n >= 64.1)
    CFLAGS="$CFLAGS $MOZ_ICU_CFLAGS"
    CXXFLAGS="$CXXFLAGS $MOZ_ICU_CFLAGS"
    AC_DEFINE(MOZ_SYSTEM_ICU)
fi

AC_SUBST(MOZ_SYSTEM_ICU)

MOZ_ARG_WITH_STRING(intl-api,
[  --with-intl-api, --without-intl-api
    Determine the status of the ECMAScript Internationalization API.  The first
    (or lack of any of these) builds and exposes the API.  The second doesn't
    build ICU at all.],
    _INTL_API=$withval)

ENABLE_INTL_API=
case "$_INTL_API" in
no)
    ;;
yes)
    ENABLE_INTL_API=1
    ;;
*)
    AC_MSG_ERROR([Invalid value passed to --with-intl-api: $_INTL_API])
    ;;
esac

if test -n "$ENABLE_INTL_API"; then
    USE_ICU=1
fi

if test -n "$ENABLE_INTL_API"; then
    AC_DEFINE(ENABLE_INTL_API)
fi

dnl Settings for the implementation of the ECMAScript Internationalization API
if test -n "$USE_ICU"; then
    icudir="$_topsrcdir/intl/icu/source"
    if test ! -d "$icudir"; then
        icudir="$_topsrcdir/../../intl/icu/source"
        if test ! -d "$icudir"; then
            AC_MSG_ERROR([Cannot find the ICU directory])
        fi
    fi

    version=`sed -n 's/^[[[:space:]]]*#[[:space:]]*define[[:space:]][[:space:]]*U_ICU_VERSION_MAJOR_NUM[[:space:]][[:space:]]*\([0-9][0-9]*\)[[:space:]]*$/\1/p' "$icudir/common/unicode/uvernum.h"`
    if test x"$version" = x; then
       AC_MSG_ERROR([cannot determine icu version number from uvernum.h header file $lineno])
    fi
    MOZ_ICU_VERSION="$version"

    # TODO: the l is actually endian-dependent
    # We could make this set as 'l' or 'b' for little or big, respectively,
    # but we'd need to check in a big-endian version of the file.
    ICU_DATA_FILE="icudt${version}l.dat"
fi

AC_SUBST(MOZ_ICU_VERSION)
AC_SUBST(ENABLE_INTL_API)
AC_SUBST(USE_ICU)
AC_SUBST(ICU_DATA_FILE)

if test -n "$USE_ICU"; then
    dnl Source files that use ICU should have control over which parts of the ICU
    dnl namespace they want to use.
    AC_DEFINE(U_USING_ICU_NAMESPACE,0)

    if test -z "$MOZ_SYSTEM_ICU"; then
        case "$OS_TARGET:$CPU_ARCH" in
        WINNT:aarch64)
            dnl we use non-yasm, non-GNU as solutions here.
            ;;
        *)
            if test -z "$YASM" -a -z "$GNU_AS" -a "$COMPILE_ENVIRONMENT"; then
                AC_MSG_ERROR([Building ICU requires either yasm or a GNU assembler. If you do not have either of those available for this platform you must use --without-intl-api])
            fi
            ;;
        esac
        dnl We build ICU as a static library.
        AC_DEFINE(U_STATIC_IMPLEMENTATION)
    fi
fi
])