+
+ if test -d "$withval/include"; then
+ CFLAGS="$CFLAGS -I$withval/include"
+ else
+ CFLAGS="$CFLAGS -I$withval"
+ fi
+ if test -d "$withval/lib"; then
+ withval="-L$withval/lib -lgmp"
+ else
+ withval="-L$withval -lgmp"
+ fi
+
+ LIBS="$withval $LIBS"
+ AC_CHECK_LIB(gmp, __gmpz_init,
+ [
+ mp_gmp=true
+ AC_DEFINE(SILC_MP_GMP)
+ AC_MSG_RESULT(Using GMP as a MP library.)
+ ])
+ ;;
+ esac
+ ],
+ AC_MSG_RESULT(no)
+ )
+
+AM_CONDITIONAL(SILC_MP_GMP, test x$mp_gmp = xtrue)
+AM_CONDITIONAL(SILC_MP_NSS_MPI, test x$mp_gmp = xfalse)
+if test x$mp_gmp = xfalse; then
+ AC_DEFINE(SILC_MP_NSS_MPI)
+ AC_MSG_RESULT(Using NSS MPI as a MP library.)
+fi
+
+# iconv support
+#
+check_iconv=true
+has_iconv=false
+AC_MSG_CHECKING(whether to implicit search for libiconv)
+AC_ARG_WITH(iconv,
+ [[ --with-iconv[=DIR] use libiconv [search in DIR/include and DIR/lib]]],
+ [
+ case "${withval}" in
+ no)
+ AC_MSG_RESULT(no)
+
+ AC_CHECK_HEADERS(iconv.h, AC_CHECK_FUNC(iconv, has_iconv=true))
+ check_iconv=false
+ ;;
+ *)
+ AC_MSG_RESULT(yes)
+
+ if test -d $withval/include; then
+ CPPFLAGS="$CPPFLAGS -I$withval/include"
+ CFLAGS="$CFLAGS -I$withval/include"
+ fi
+ if test -d $withval/lib; then
+ LDFLAGS="$LDFLAGS -L$withval/lib"
+ fi
+ esac
+ ],
+ [
+ AC_MSG_RESULT(no)
+
+ AC_CHECK_HEADERS(iconv.h, AC_CHECK_FUNCS(iconv,
+ [
+ has_iconv=true
+ check_iconv=false
+ ]))
+ ])
+
+if test x$check_iconv = xtrue; then
+ AC_MSG_RESULT(starting search...)
+
+ # XXX
+ unset ac_cv_header__iconv_h_ ac_cv_header_iconv_h || true
+
+ AC_CHECK_HEADERS(iconv.h,
+ [
+ LIBS="$LIBS -liconv"
+ AC_MSG_CHECKING(for iconv in -liconv)
+ AC_TRY_LINK(
+ [
+ #include <stdlib.h>
+ #include <iconv.h>
+ ],
+ [
+ iconv_t cd = iconv_open("", "");
+ iconv(cd, NULL, NULL, NULL, NULL);
+ iconv_close(cd);
+ ],
+ [
+ echo "yes"
+ AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
+ has_iconv=true
+ check_iconv=true
+ ])
+ ])
+fi
+
+if test x$check_iconv = xtrue; then
+ # search for iconv library..
+ SAVE_CPPFLAGS="$CPPFLAGS"
+ SAVE_CFLAGS="$CFLAGS"
+ SAVE_LDFLAGS="$LDFLAGS"
+
+ for dir in `echo "/usr/local /usr/pkg /usr/contrib"`; do
+ if test x$has_iconv = xfalse; then
+ AC_MSG_RESULT(searching in $dir...)
+
+ CPPFLAGS="$SAVE_CPPFLAGS"
+ CFLAGS="$SAVE_CFLAGS"
+ LDFLAGS="$SAVE_LDFLAGS"
+
+ if test -d $dir/include; then
+ CPPFLAGS="$CPPFLAGS -I$dir/include"
+ CFLAGS="$CFLAGS -I$dir/include"
+ fi
+ if test -d $dir/lib; then
+ LDFLAGS="$LDFLAGS -L$dir/lib"
+ fi
+
+ # XXX
+ unset ac_cv_header__iconv_h_ ac_cv_header_iconv_h || true
+
+ AC_CHECK_HEADERS(iconv.h,
+ [
+ LIBS="$LIBS -liconv"
+ AC_MSG_CHECKING(for iconv in -liconv)
+ AC_TRY_LINK(
+ [
+ #include <stdlib.h>
+ #include <iconv.h>
+ ],
+ [
+ iconv_t cd = iconv_open("", "");
+ iconv(cd, NULL, NULL, NULL, NULL);
+ iconv_close(cd);
+ ],
+ [
+ echo "yes"
+ has_iconv=true
+ AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
+ ],
+ [
+ has_iconv=false
+ ])
+ ])
+ fi
+ done
+fi
+
+if test x$has_iconv = xtrue; then
+ # (1) Some implementations of iconv won't convert from UTF-8 to UTF-8.
+ # (2) In glibc-2.1.2 and earlier there is a bug that messes up ob and
+ # obl when args 2 and 3 are 0 (fixed in glibc-2.1.3).
+ #
+ AC_CACHE_CHECK([whether this iconv is good enough], ac_iconv_good,
+ AC_TRY_RUN(
+ [
+ #include <iconv.h>
+ int main() {
+ iconv_t cd;
+ changequote(, )dnl
+ char buf[4];
+ changequote([, ])dnl
+ char *ob;
+ size_t obl;
+ ob = buf, obl = sizeof(buf);
+ return ((cd = iconv_open("UTF-8", "UTF-8")) != (iconv_t)(-1) &&
+ (iconv(cd, 0, 0, &ob, &obl) ||
+ !(ob == buf && obl == sizeof(buf)) ||
+ iconv_close(cd)));
+ }
+ ],
+ [
+ ac_iconv_good=yes
+ ],
+ [
+ ac_iconv_good=no
+ ],
+ [
+ ac_iconv_good=yes
+ ])