[#771] Do not run dlclose/musl part

configure.ac

@@ -281,6 +281,13 @@ case "$host" in
 esac
 KEA_CXXFLAGS="$KEA_CXXFLAGS $MULTITHREADING_FLAG"
 
+dumpmachine=`$CXX -dumpmachine`
+case "$dumpmachine" in
+*-musl)
+        AC_DEFINE([LIBC_MUSL], [1], [Define to 1 if libc is musl])
+        ;;
+esac
+
 # Disable -Werror by default. Only use it if specifically enabled.
 # The usage of this flag is:
 #

src/lib/hooks/tests/library_manager_unittest.cc

@@ -731,8 +731,11 @@ TEST_F(LibraryManagerTest, libraryLoggerSetup) {
 
     // After unloading the library, the messages should be unregistered.
     EXPECT_TRUE(lib_manager.unloadLibrary());
+    // The musl libc does not implement dlclose
+#ifndef LIBC_MUSL
     EXPECT_TRUE(dict->getText("BCL_LOAD_START").empty());
     EXPECT_TRUE(dict->getText("BCL_LOAD_END").empty());
+#endif
 }
 
 } // Anonymous namespace