Test ignored-error storage across translation units

tests/err_ignore_multitu.c

@@ -0,0 +1,18 @@
+#include "akerror.h"
+#include "err_ignore_multitu.h"
+#include <stdio.h>
+
+int main(void)
+{
+    akerr_ErrorContext **main_address = &__akerr_last_ignored;
+    akerr_ErrorContext **helper_address = akerr_multitu_snapshot_address();
+
+    if ( main_address != helper_address ) {
+	fprintf(stderr,
+		"CHECK FAILED: ignored-error storage differs between translation units\n");
+	return 1;
+    }
+
+    fprintf(stderr, "err_ignore_multitu ok\n");
+    return 0;
+}

tests/err_ignore_multitu.h

@@ -0,0 +1,8 @@
+#ifndef AKERR_TEST_IGNORE_MULTITU_H
+#define AKERR_TEST_IGNORE_MULTITU_H
+
+#include "akerror.h"
+
+akerr_ErrorContext **akerr_multitu_snapshot_address(void);
+
+#endif

tests/err_ignore_multitu_helper.c

@@ -0,0 +1,6 @@
+#include "err_ignore_multitu.h"
+
+akerr_ErrorContext **akerr_multitu_snapshot_address(void)
+{
+    return &__akerr_last_ignored;
+}