Introduce gnucash-guile shared library

This (currently empty) library is intented to become
the standard api library for guile code that wants
to use the libgnucash functionality.

CMakeLists.txt

@@ -868,7 +868,7 @@ configure_file(
 add_custom_target(uninstall
         COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
 
-set(_MODULES gnc-core-utils gnc-module gnc-backend-xml-utils)
+set(_MODULES gnc-core-utils gnc-module gnc-backend-xml-utils gnucash-guile)
 
 if (WITH_SQL)
   list(APPEND _MODULES gnc-backend-sql)

bindings/guile/CMakeLists.txt

@@ -1,7 +1,23 @@
 add_subdirectory(test)
 
-set(GUILE_DEPENDS      scm-core-utils scm-gnc-module gncmod-engine)
+set(guile_HEADERS )
+
+set(guile_SOURCES
+    gnc-guile-bindings.c)
+set(guile_bindings_ALL_INCLUDES
+    ${CMAKE_BINARY_DIR}/common
+    ${CMAKE_CURRENT_SOURCE_DIR})
 
+add_library(gnucash-guile SHARED ${guile_SOURCES} ${guile_HEADERS})
+target_include_directories(gnucash-guile PUBLIC ${guile_bindings_ALL_INCLUDES})
+
+install(TARGETS gnucash-guile
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+
+set(GUILE_DEPENDS      scm-core-utils scm-gnc-module gncmod-engine)
 
 gnc_add_scheme_targets(scm-scm
   "utilities.scm"
@@ -18,7 +34,9 @@ gnc_add_scheme_targets(price-quotes
   FALSE)
 
 
-set_local_dist(guile_DIST_local CMakeLists.txt utilities.scm price-quotes.scm)
+set_local_dist(guile_DIST_local CMakeLists.txt utilities.scm price-quotes.scm
+    ${guile_SOURCES} ${guile_HEADERS}
+)
 set(guile_DIST ${guile_DIST_local} ${test_guile_DIST} PARENT_SCOPE)
 
 

bindings/guile/gnc-guile-bindings.c

@@ -0,0 +1,43 @@
+/*********************************************************************
+ * gnc-guile-bindings.c
+ * library to enable guile bindings for libgnucash
+ *
+ * Copyright (c) 2019 GnuCash Development Team
+ *********************************************************************/
+/********************************************************************\
+ * This program is free software; you can redistribute it and/or    *
+ * modify it under the terms of 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.              *
+ *                                                                  *
+ * This program 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, contact:                        *
+ *                                                                  *
+ * Free Software Foundation           Voice:  +1-617-542-5942       *
+ * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
+ * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
+ *                                                                  *
+\********************************************************************/
+
+
+#include <config.h>
+#include <libguile.h>
+
+void gnc_guile_bindings_init(void);
+
+static int is_initialized = 0;
+
+void
+gnc_guile_bindings_init(void)
+{
+    if (!is_initialized)
+    {
+        /* Do what's necessary to initialize the bindings */
+        is_initialized = 1;
+    }
+}

po/POTFILES.in

@@ -1,5 +1,6 @@
 # This is a list of files which contain translatable strings.
 # This file was autogenerated by cmake.
+bindings/guile/gnc-guile-bindings.c
 bindings/guile/price-quotes.scm
 bindings/guile/utilities.scm
 borrowed/goffice/go-charmap-sel.c