RcppArmadillo 15.2.2-0 with Armadillo 15.2.2

ChangeLog

@@ -1,3 +1,15 @@
+2025-11-20  Dirk Eddelbuettel  <edd@debian.org>
+
+	* DESCRIPTION (Version, Date): RcppArmadillo 15.2.2-0
+        * inst/NEWS.Rd: Idem
+        * configure.ac: Idem
+        * configure: Idem
+
+	* inst/include/current/: Sync with Armadillo 15.2.2
+
+	* inst/tinytest/test_Rlapack.R: Skip this test involving complex
+	algebra if on macOS as the LAPACK switch by R affects it
+
 2025-11-13  Dirk Eddelbuettel  <edd@debian.org>
 
 	* R/inline.R (inlineCxxPlugin): No longer special-case macOS for

DESCRIPTION

@@ -1,8 +1,8 @@
 Package: RcppArmadillo
 Type: Package
 Title: 'Rcpp' Integration for the 'Armadillo' Templated Linear Algebra Library
-Version: 15.2.1-0
-Date: 2025-10-28
+Version: 15.2.2-0
+Date: 2025-11-20
 Authors@R: c(person("Dirk", "Eddelbuettel", role = c("aut", "cre"), email = "edd@debian.org",
                     comment = c(ORCID = "0000-0001-6419-907X")),
              person("Romain", "Francois", role = "aut",

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for RcppArmadillo 15.2.1-0.
+# Generated by GNU Autoconf 2.72 for RcppArmadillo 15.2.2-0.
 #
 # Report bugs to <edd@debian.org>.
 #
@@ -603,8 +603,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='RcppArmadillo'
 PACKAGE_TARNAME='rcpparmadillo'
-PACKAGE_VERSION='15.2.1-0'
-PACKAGE_STRING='RcppArmadillo 15.2.1-0'
+PACKAGE_VERSION='15.2.2-0'
+PACKAGE_STRING='RcppArmadillo 15.2.2-0'
 PACKAGE_BUGREPORT='edd@debian.org'
 PACKAGE_URL=''
 
@@ -1221,7 +1221,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures RcppArmadillo 15.2.1-0 to adapt to many kinds of systems.
+'configure' configures RcppArmadillo 15.2.2-0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1283,7 +1283,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of RcppArmadillo 15.2.1-0:";;
+     short | recursive ) echo "Configuration of RcppArmadillo 15.2.2-0:";;
    esac
   cat <<\_ACEOF
 
@@ -1364,7 +1364,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-RcppArmadillo configure 15.2.1-0
+RcppArmadillo configure 15.2.2-0
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -1480,7 +1480,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by RcppArmadillo $as_me 15.2.1-0, which was
+It was created by RcppArmadillo $as_me 15.2.2-0, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3862,7 +3862,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by RcppArmadillo $as_me 15.2.1-0, which was
+This file was extended by RcppArmadillo $as_me 15.2.2-0, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -3917,7 +3917,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-RcppArmadillo config.status 15.2.1-0
+RcppArmadillo config.status 15.2.2-0
 configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -11,7 +11,7 @@
 AC_PREREQ([2.69])
 
 ## Process this file with autoconf to produce a configure script.
-AC_INIT([RcppArmadillo],[15.2.1-0],[edd@debian.org])
+AC_INIT([RcppArmadillo],[15.2.2-0],[edd@debian.org])
 
 ## Set R_HOME, respecting an environment variable if one is set
 : ${R_HOME=$(R RHOME)}

inst/NEWS.Rd

@@ -3,6 +3,19 @@
 \newcommand{\ghpr}{\href{https://github.com/RcppCore/RcppArmadillo/pull/#1}{##1}}
 \newcommand{\ghit}{\href{https://github.com/RcppCore/RcppArmadillo/issues/#1}{##1}}
 
+\section{Changes in RcppArmadillo version 15.2.2-0 (2025-11-20) (GitHub Only)}{
+  \itemize{
+    \item Upgraded to Armadillo release 15.2.2 (Medium Roast Deluxe)
+    \itemize{
+      \item Improved reproducibility of random number generation when using OpenMP
+    }
+    \item Skip a unit test file under macOS as complex algebra seems to fail
+    under newer macOS LAPACK setting
+    \item Further OpenMP detection rework for macOS
+    \item Define ARMA_CRIPPLED_LAPACK on Windows only if 'LEGACY' Armadillo selected
+  }
+}
+
 \section{Changes in RcppArmadillo version 15.2.1-0 (2025-10-28) (GitHub Only)}{
   \itemize{
     \item Upgraded to Armadillo release 15.2.1 (Medium Roast Deluxe)

inst/include/current/armadillo_bits/arma_rng.hpp

@@ -26,6 +26,9 @@
 #undef  ARMA_USE_THREAD_LOCAL
 #define ARMA_USE_THREAD_LOCAL
 
+#undef  ARMA_USE_THREAD_UNIQUE_RNG_SEED
+#define ARMA_USE_THREAD_UNIQUE_RNG_SEED
+
 #if (defined(ARMA_RNG_ALT) || defined(ARMA_DONT_USE_CXX11_RNG))
   #undef ARMA_USE_CXX11_RNG
 #endif
@@ -34,6 +37,10 @@
   #undef ARMA_USE_THREAD_LOCAL
 #endif
 
+#if defined(ARMA_DONT_USE_THREAD_UNIQUE_RNG_SEED)
+  #undef ARMA_USE_THREAD_UNIQUE_RNG_SEED
+#endif
+
 
 // NOTE: ARMA_WARMUP_PRODUCER enables a workaround 
 // NOTE: for thread_local issue on macOS 11 and/or AppleClang 12.0
@@ -129,24 +136,42 @@ arma_rng::get_producer()
   {
   #if defined(ARMA_USE_THREAD_LOCAL)
 
-    // use a thread-safe RNG, with each thread having its own unique starting seed
-
-    static std::atomic<std::size_t> mt19937_64_producer_counter(0);
-
-    static thread_local std::mt19937_64 mt19937_64_producer( std::mt19937_64::default_seed + mt19937_64_producer_counter++ );
+    // thread-safe RNG
 
-    arma_rng::warmup_producer(mt19937_64_producer);
+    #if defined(ARMA_USE_THREAD_UNIQUE_RNG_SEED)
+
+      // each thread has unique starting seed
+
+      #if defined(ARMA_USE_OPENMP)
+
+        static thread_local std::mt19937_64 mt19937_64_producer( std::mt19937_64::default_seed + arma_rng::seed_type(omp_get_thread_num()) );
+
+      #else
+
+        static std::atomic<std::size_t> mt19937_64_producer_counter(0);
+
+        static thread_local std::mt19937_64 mt19937_64_producer( std::mt19937_64::default_seed + mt19937_64_producer_counter++ );
+
+      #endif
+
+    #else
+
+      // each thread has the same starting seed
+
+      static thread_local std::mt19937_64 mt19937_64_producer( std::mt19937_64::default_seed );
+
+    #endif
 
   #else
 
-    // use a plain RNG in case we don't have thread_local
+    // plain RNG in case we don't have thread_local
 
     static std::mt19937_64 mt19937_64_producer( std::mt19937_64::default_seed );
 
-    arma_rng::warmup_producer(mt19937_64_producer);
-
   #endif
 
+  arma_rng::warmup_producer(mt19937_64_producer);
+
   return mt19937_64_producer;
   }
 
@@ -226,9 +251,45 @@ arma_rng::set_seed(const arma_rng::seed_type val)
     }
   #elif defined(ARMA_USE_CXX11_RNG)
     {
-    arma_rng::lock_producer();
-    arma_rng::get_producer().seed(val);
-    arma_rng::unlock_producer();
+    #if defined(ARMA_USE_OPENMP) && defined(ARMA_USE_THREAD_LOCAL)
+      {
+      arma_rng::lock_producer();
+
+      #if defined(ARMA_USE_THREAD_UNIQUE_RNG_SEED)
+        constexpr bool thread_unique_rng_seed = true;
+      #else
+        constexpr bool thread_unique_rng_seed = false;
+      #endif
+
+      // if we're already in a parallel region, assume the user is setting the seed for each thread
+
+      if( (thread_unique_rng_seed == false) || bool(omp_in_parallel()) )
+        {
+        arma_rng::get_producer().seed(val);
+        }
+      else
+        {
+        const int n_threads = int( (std::max)( int(1), int(omp_get_max_threads()) ) );
+
+        #pragma omp parallel for ordered schedule(static) num_threads(n_threads)
+        for(int t=0; t < n_threads; ++t)
+          {
+          #pragma omp ordered
+            {
+            arma_rng::get_producer().seed(val + arma_rng::seed_type(omp_get_thread_num()));
+            }
+          }
+        }
+
+      arma_rng::unlock_producer();
+      }
+    #else
+      {
+      arma_rng::lock_producer();
+      arma_rng::get_producer().seed(val);
+      arma_rng::unlock_producer();
+      }
+    #endif
     }
   #else
     {

inst/include/current/armadillo_bits/arma_version.hpp

@@ -23,7 +23,7 @@
 
 #define ARMA_VERSION_MAJOR 15
 #define ARMA_VERSION_MINOR 2
-#define ARMA_VERSION_PATCH 1
+#define ARMA_VERSION_PATCH 2
 #define ARMA_VERSION_NAME  "Medium Roast Deluxe"
 
 

inst/tinytest/test_Rlapack.R

@@ -20,6 +20,8 @@
 
 library(RcppArmadillo)
 
+if (Sys.info()['sysname'] == "Darwin") exit_file("Skip on macOS")
+
 if (isFALSE(tryCatch({svd(matrix(complex(1, 1, 1),1,1)); TRUE}, error=function(e) FALSE)))
     exit_file("Skipping for lack of Fortran complex functions in this R build")