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diff --git a/src/configure b/src/configure
index 80653dc..1e62ce7 100755
--- a/src/configure
+++ b/src/configure
@@ -6165,6 +6165,53 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
fi
+ # Justified and Ancient (see #1093)
+ if test "1" = 1; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports -std=gnu89" >&5
+$as_echo_n "checking if $CC supports -std=gnu89... " >&6; }
+fi
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ ac_saved_cflags="$CFLAGS"
+ CFLAGS="-Werror -std=gnu89"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ if test "1" = 1; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+fi
+ CFLAGS_EX="$CFLAGS_EX -std=gnu89"
+
+else
+ if test "1" = 1; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$ac_saved_cflags"
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
for i in "$CFLAGS_EX"; do
jtr_list_add_dupe=0
diff --git a/src/configure.ac b/src/configure.ac
index 5a3b1c7..0ea18f3 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -200,6 +200,8 @@ fi
JTR_FLAG_CHECK([-Wno-format-extra-args], 1)
#JTR_FLAG_CHECK([-Wno-unneeded-internal-declaration], 1)
AS_IF([test "x$JTR_FLAG_Q_CHECK_WORKS" = xyes], [JTR_FLAG_CHECK([-Qunused-arguments],1)])
+ # Justified and Ancient (see #1093)
+ JTR_FLAG_CHECK([-std=gnu89], 1)
JTR_LIST_ADD(CFLAGS_EXTRA, ["$CFLAGS_EX"])
],[dnl
AC_MSG_NOTICE([Unable to validate $CC command line arguments. CFLAGS may need to be passed to ./configure for proper build])
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