KWSys 2021-06-28 (0648cb1a)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 0648cb1ac5c91430b190f32319c528345b280dc3 (master).

Upstream Shortlog
-----------------

Ben Boeckel (2):
      df91e5f1 EncodingC: use NULL for pointers
      ab959cd2 SystemInformation: fix typo in comment

Björn Esser (2):
      b4a2a03c testDynamicLoader: Use LIBDL_SO macro if defined.
      b954dd54 testDynamicLoader: Use LIBC_SO if LIBDL_SO is not defined by glibc anymore.

EncodingC.c

@@ -60,7 +60,7 @@ size_t kwsysEncoding_wcstombs(char* dest, const wchar_t* str, size_t n)
 char* kwsysEncoding_DupToNarrow(const wchar_t* str)
 {
   char* ret = NULL;
-  size_t length = kwsysEncoding_wcstombs(0, str, 0) + 1;
+  size_t length = kwsysEncoding_wcstombs(NULL, str, 0) + 1;
   if (length > 0) {
     ret = (char*)malloc(length);
     if (ret) {

SystemInformation.cxx

@@ -1383,7 +1383,7 @@ void SymbolProperties::Initialize(void* address)
   }
 #  else
 // second fallback use builtin backtrace_symbols
-// to decode the bactrace.
+// to decode the backtrace.
 #  endif
 }
 #endif // don't define this class if we're not using it

testDynamicLoader.cxx

@@ -8,6 +8,25 @@
 #  include <be/kernel/OS.h> /* disable_debugger() API. */
 #endif
 
+// Needed for __GLIBC__ test macro.
+#ifdef __linux__
+#  include <features.h>
+#endif
+
+// Will define LIBDL_SO macro on systems with glibc.
+#ifdef __GLIBC__
+#  include <gnu/lib-names.h>
+// Define to LIBC_SO, if not defined by above header.
+#  ifndef LIBDL_SO
+#    define LIBDL_SO LIBC_SO
+#  endif
+#endif
+
+// Define the LIBDL_SO macro, if not defined above.
+#ifndef LIBDL_SO
+#  define LIBDL_SO "libdl.so"
+#endif
+
 // Work-around CMake dependency scanning limitation.  This must
 // duplicate the above list of headers.
 #if 0
@@ -107,8 +126,8 @@ int testDynamicLoader(int argc, char* argv[])
   // This one is actually fun to test, since dlopen is by default
   // loaded...wonder why :)
   res += TestDynamicLoader("foobar.lib", "dlopen", 0, 1, 0);
-  res += TestDynamicLoader("libdl.so", "dlopen", 1, 1, 1);
-  res += TestDynamicLoader("libdl.so", "TestDynamicLoader", 1, 0, 1);
+  res += TestDynamicLoader(LIBDL_SO, "dlopen", 1, 1, 1);
+  res += TestDynamicLoader(LIBDL_SO, "TestDynamicLoader", 1, 0, 1);
 #endif
   // Now try on the generated library
   std::string libname = GetLibName(KWSYS_NAMESPACE_STRING "TestDynload");