Add version script versioning for libwraster

Enable symbol-versioning for libwraster and stop exporting public
symbols.

configure.ac

@@ -837,6 +837,8 @@ if test "$enableval" = yes; then
 fi
 )
 
+gl_LD_VERSION_SCRIPT
+
 AC_OUTPUT(Makefile po/Makefile util/Makefile util/po/Makefile \
 	WINGs/Makefile WINGs/WINGs/Makefile WINGs/Documentation/Makefile \
 	WINGs/Examples/Makefile WINGs/Resources/Makefile WINGs/Tests/Makefile \

wrlib/Makefile.am

@@ -10,6 +10,10 @@ lib_LTLIBRARIES = libwraster.la
 
 libwraster_la_LDFLAGS = -version-info @WRASTER_VERSION@
 
+if HAVE_LD_VERSION_SCRIPT
+libwraster_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libwraster.map
+endif
+
 bin_SCRIPTS = get-wraster-flags
 
 include_HEADERS = wraster.h

wrlib/libwraster.map

@@ -0,0 +1,100 @@
+/* libwraster.map - libtool symbol version script for libwraster
+ * Copyright (c) 2010 Andreas Metzler
+ *
+ * This file is part of the Raster graphics library
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+LIBWRASTER3
+{
+  global:
+    RBevelImage;
+    RBlurImage;
+    RClearImage;
+    RCloneImage;
+    RCombineArea;
+    RCombineAreaWithOpaqueness;
+    RCombineImages;
+    RCombineImagesWithOpaqueness;
+    RCombineImageWithColor;
+    RConvertImage;
+    RConvertImageMask;
+    RCopyArea;
+    RCreateContext;
+    RCreateImage;
+    RCreateImageFromDrawable;
+    RCreateImageFromXImage;
+    RCreateXImage;
+    RDestroyXImage;
+    RDrawLine;
+    RDrawLines;
+    RDrawSegments;
+    RErrorCode;
+    RFillImage;
+    RGetClosestXColor;
+    RGetImageFileFormat;
+    RGetImageFromXPMData;
+    RGetPixel;
+    RGetSubImage;
+    RGetXImage;
+    RHSVtoRGB;
+    RLoadImage;
+    RMakeCenteredImage;
+    RMakeTiledImage;
+    RMessageForError;
+    ROperateLine;
+    ROperateLines;
+    ROperatePixel;
+    ROperatePixels;
+    ROperateSegments;
+    RPutPixel;
+    RPutPixels;
+    RPutXImage;
+    RReleaseImage;
+    RRenderGradient;
+    RRenderInterwovenGradient;
+    RRenderMultiGradient;
+    RRetainImage;
+    RRGBtoHSV;
+    RRotateImage;
+    RSaveImage;
+    RScaleImage;
+    RSmoothScaleImage;
+    RSupportedFileFormats;
+
+  local:
+# _edata
+# _end
+# _fini
+# _init
+# __bss_start
+# calculateCombineArea
+# contrib
+# R_CreateXImageMappedPixmap
+# RLoadGIF
+# RLoadJPEG
+# RLoadPNG
+# RLoadPPM
+# RLoadTIFF
+# RLoadXPM
+# RSaveXPM
+# _wraster_change_filter
+# WRasterLibVersion
+# x86_check_mmx
+# x86_mmx_TrueColor_24_to_16
+# x86_mmx_TrueColor_32_to_16
+# x86_PseudoColor_32_to_8
+    *;
+};