librhash: Build the library within CMake

Update `ustd.h` to include KWSys Large File Support configuration so
that consistent stream libraries are used (on AIX with XL).

Add a `cm_rhash.h` header to include the CMake-provided copy of the
`rhash.h` header from CMake sources.

3 files changed, 39 insertions, 0 deletions

diff --git a/Utilities/cm_rhash.h b/Utilities/cm_rhash.h
new file mode 100644
index 0000000..23d5409
--- /dev/null
+++ b/Utilities/cm_rhash.h
@@ -0,0 +1,8 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cm_rhash_h
+#define cm_rhash_h
+
+#include <cmlibrhash/librhash/rhash.h>
+
+#endif
diff --git a/Utilities/cmlibrhash/CMakeLists.txt b/Utilities/cmlibrhash/CMakeLists.txt
new file mode 100644
index 0000000..47d069a
--- /dev/null
+++ b/Utilities/cmlibrhash/CMakeLists.txt
@@ -0,0 +1,28 @@
+project(librhash C)
+
+set(librhash_sources
+  librhash/algorithms.c
+  librhash/algorithms.h
+  librhash/byte_order.c
+  librhash/byte_order.h
+  librhash/hex.c
+  librhash/hex.h
+  librhash/md5.c
+  librhash/md5.h
+  librhash/rhash.c
+  librhash/rhash.h
+  librhash/sha1.c
+  librhash/sha1.h
+  librhash/sha256.c
+  librhash/sha256.h
+  librhash/sha512.c
+  librhash/sha512.h
+  librhash/ustd.h
+  librhash/util.h
+  )
+
+include_directories(
+  ${KWSYS_HEADER_ROOT}
+  )
+
+add_library(cmlibrhash ${librhash_sources})
diff --git a/Utilities/cmlibrhash/librhash/ustd.h b/Utilities/cmlibrhash/librhash/ustd.h
index 94f1ae2..38c4e3e 100644
--- a/Utilities/cmlibrhash/librhash/ustd.h
+++ b/Utilities/cmlibrhash/librhash/ustd.h
@@ -2,6 +2,9 @@
 #ifndef LIBRHASH_USTD_H
 #define LIBRHASH_USTD_H
 
+/* Include KWSys Large File Support configuration. */
+#include <cmsys/Configure.h>
+
 #if _MSC_VER >= 1300
 
 # define int64_t __int64