Check for utf8 local support before testing it.

Check for utf8 local support and if not found, do not attempt to run the
utf8 tests.  Suggested by djm@

Makefile.in

@@ -580,6 +580,7 @@ tests interop-tests t-exec: regress-prep regress-binaries $(TARGETS)
 	TEST_SSH_PUTTYGEN="puttygen"; \
 	TEST_SSH_CONCH="conch"; \
 	TEST_SSH_IPV6="@TEST_SSH_IPV6@" ; \
+	TEST_SSH_UTF8="@TEST_SSH_UTF8@" ; \
 	TEST_SSH_ECC="@TEST_SSH_ECC@" ; \
 	cd $(srcdir)/regress || exit $$?; \
 	$(MAKE) \
@@ -604,6 +605,7 @@ tests interop-tests t-exec: regress-prep regress-binaries $(TARGETS)
 		TEST_SSH_PUTTYGEN="$${TEST_SSH_PUTTYGEN}" \
 		TEST_SSH_CONCH="$${TEST_SSH_CONCH}" \
 		TEST_SSH_IPV6="$${TEST_SSH_IPV6}" \
+		TEST_SSH_UTF8="$${TEST_SSH_UTF8}" \
 		TEST_SSH_ECC="$${TEST_SSH_ECC}" \
 		TEST_SHELL="${TEST_SHELL}" \
 		EXEEXT="$(EXEEXT)" \

configure.ac

@@ -1776,6 +1776,23 @@ CFLAGS="$CFLAGS -D_XOPEN_SOURCE"
 AC_CHECK_FUNCS([mblen mbtowc nl_langinfo wcwidth])
 CFLAGS="$saved_CFLAGS"
 
+TEST_SSH_UTF8=yes
+AC_MSG_CHECKING([for utf8 locale support])
+AC_RUN_IFELSE(
+	[AC_LANG_PROGRAM([[
+#include <locale.h>
+	]], [[
+	char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
+	if (loc != NULL)
+		exit(0);
+	exit(1);
+	]])],
+	AC_MSG_RESULT(yes),
+	[AC_MSG_RESULT(no)
+	 TEST_SSH_UTF8=no],
+	AC_MSG_WARN([cross compiling: assuming yes])
+)
+
 AC_LINK_IFELSE(
         [AC_LANG_PROGRAM(
            [[ #include <ctype.h> ]],
@@ -5009,6 +5026,7 @@ else
 fi
 AC_CHECK_DECL([BROKEN_GETADDRINFO],  [TEST_SSH_IPV6=no])
 AC_SUBST([TEST_SSH_IPV6], [$TEST_SSH_IPV6])
+AC_SUBST([TEST_SSH_UTF8], [$TEST_SSH_UTF8])
 AC_SUBST([TEST_MALLOC_OPTIONS], [$TEST_MALLOC_OPTIONS])
 AC_SUBST([UNSUPPORTED_ALGORITHMS], [$unsupported_algorithms])
 

regress/Makefile

@@ -225,5 +225,7 @@ unit:
 		$$V ${.OBJDIR}/unittests/hostkeys/test_hostkeys \
 			-d ${.CURDIR}/unittests/hostkeys/testdata ; \
 		$$V ${.OBJDIR}/unittests/match/test_match ; \
+		if test "x${TEST_SSH_UTF8}" = "xyes"  ; then \
 			$$V ${.OBJDIR}/unittests/utf8/test_utf8 ; \
+		fi \
 	fi