[2980] Take account of differences in DLL naming

On Ubuntu, DLLs have the suffix .so: on OSX, the suffix is .dylib

src/lib/hooks/tests/test_libraries.h.in

@@ -15,39 +15,60 @@
 #ifndef TEST_LIBRARIES_H
 #define TEST_LIBRARIES_H
 
+#include <config.h>
+
 namespace {
 
+
+// Take carse of differences in DLL naming between operating systems.
+
+#ifdef OS_BSD
+#define DLL_SUFFIX ".dylib"
+
+#else
+#define DLL_SUFFIX ".so"
+
+#endif
+
+
 // Names of the libraries used in these tests.  These libraries are built using
 // libtool, so we need to look in the hidden ".libs" directory to locate the
 // .so file.  Note that we access the .so file - libtool creates this as a
 // like to the real shared library.
 
 // Basic library with context_create and three "standard" callouts.
-static const char* BASIC_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libbcl.so";
+static const char* BASIC_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libbcl"
+                                           DLL_SUFFIX;
 
 // Library with context_create and three "standard" callouts, as well as
 // load() and unload() functions.
-static const char* FULL_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libfcl.so";
+static const char* FULL_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libfcl"
+                                          DLL_SUFFIX;
 
 // Library where the version() function returns an incorrect result.
-static const char* INCORRECT_VERSION_LIBRARY = "@abs_builddir@/.libs/libivl.so";
+static const char* INCORRECT_VERSION_LIBRARY = "@abs_builddir@/.libs/libivl"
+                                               DLL_SUFFIX;
 
 // Library where some of the callout registration is done with the load()
 // function.
-static const char* LOAD_CALLOUT_LIBRARY = "@abs_builddir@/.libs/liblcl.so";
+static const char* LOAD_CALLOUT_LIBRARY = "@abs_builddir@/.libs/liblcl"
+                                          DLL_SUFFIX;
 
 // Library where the load() function returns an error.
 static const char* LOAD_ERROR_CALLOUT_LIBRARY =
-    "@abs_builddir@/.libs/liblecl.so";
+    "@abs_builddir@/.libs/liblecl" DLL_SUFFIX;
 
 // Name of a library which is not present.
-static const char* NOT_PRESENT_LIBRARY = "@abs_builddir@/.libs/libnothere.so";
+static const char* NOT_PRESENT_LIBRARY = "@abs_builddir@/.libs/libnothere"
+                                         DLL_SUFFIX;
 
 // Library that does not include a version function.
-static const char* NO_VERSION_LIBRARY = "@abs_builddir@/.libs/libnvl.so";
+static const char* NO_VERSION_LIBRARY = "@abs_builddir@/.libs/libnvl"
+                                        DLL_SUFFIX;
 
 // Library where there is an unload() function.
-static const char* UNLOAD_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libucl.so";
+static const char* UNLOAD_CALLOUT_LIBRARY = "@abs_builddir@/.libs/libucl"
+                                            DLL_SUFFIX;
 
 } // anonymous namespace