common: New file fwddecl.h.

* common/util.h (server_control_s, ctrl_t): Move to ...
* common/fwddecl.h: New file.
* common/call-gpg.h: Replace typedef by fwddecl.h.  Change include
protection macro name.
* common/Makefile.am (common_sources): Add fwddecl.h.
--

It seems some compilers do not grok a re-declaration.  Thus we factor
it out into a separate file and use the include protection macro to
protect against re-declaration.

GnuPG-bug-id: 2200
Signed-off-by: Werner Koch <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/common/fwddecl.h b/common/fwddecl.h
new file mode 100644
index 000000000..92f045389
--- /dev/null
+++ b/common/fwddecl.h
@@ -0,0 +1,39 @@
+/* fwddecl.h - Formward declarations
+ * Copyright (C) 2015 Werner Koch
+ *
+ * This file is part of GnuPG.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ *   - the GNU Lesser General Public License as published by the Free
+ *     Software Foundation; either version 3 of the License, or (at
+ *     your option) any later version.
+ *
+ * or
+ *
+ *   - the GNU General Public License as published by the Free
+ *     Software Foundation; either version 2 of the License, or (at
+ *     your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GNUPG_COMMON_FWDDECL_H
+#define GNUPG_COMMON_FWDDECL_H
+
+
+/*-- Forward declaration of the commonly used server control structure.  */
+struct server_control_s;
+typedef struct server_control_s *ctrl_t;
+
+
+#endif /*GNUPG_COMMON_FWDDECL_H*/