+ AC_MSG_RESULT(Using NSS MPI as MP library.)
+fi
+
+# iconv support
+#
+AC_ARG_WITH(iconv,
+ [ --with-iconv[=PATH] Search for libiconv in DIR/include and DIR/lib],
+ [
+ for dir in `echo "$withval" | tr : ' '`; do
+ 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$dir/lib"
+ fi
+ done
+ ])
+
+AC_CHECK_HEADER(iconv.h,
+ [
+ AC_DEFINE(HAVE_ICONV_H, 1, [Define if you have the iconv.h header.])
+ AC_CHECK_FUNC(iconv, ac_iconv_found=1,
+ [
+ LIBS="$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.])
+ ])
+ ])
+ ])
+
+if test x$ac_iconv_found = x1; then
+
+ # (1) Some implementations of iconv won't convert from UTF-8 to UTF-8.
+ # (2) In glibc-2.1.2 and earlier there is a bug that messes up ob and
+ # obl when args 2 and 3 are 0 (fixed in glibc-2.1.3).
+ #
+ AC_CACHE_CHECK([whether this iconv is good enough], ac_iconv_good,
+ AC_TRY_RUN(
+ [
+ #include <iconv.h>
+ int main() {
+ iconv_t cd;
+ changequote(, )dnl
+ char buf[4];
+ changequote([, ])dnl
+ char *ob;
+ size_t obl;
+ ob = buf, obl = sizeof(buf);
+ return ((cd = iconv_open("UTF-8", "UTF-8")) != (iconv_t)(-1) &&
+ (iconv(cd, 0, 0, &ob, &obl) ||
+ !(ob == buf && obl == sizeof(buf)) ||
+ iconv_close(cd)));
+ }
+ ],
+ [
+ ac_iconv_good=yes
+ ],
+ [
+ ac_iconv_good=no
+ ],
+ [
+ ac_iconv_good=yes
+ ])
+ )
+
+ if test x$ac_iconv_good = xno; then
+ AC_MSG_ERROR(Try using libiconv instead.)
+ fi