RcppArmadillo 15.4.1-1 with Armadillo 15.4.1 (#508)

* Armadillo 15.4.1

* RcppArmadillo 15.4.1-1

* Tag release as github-only

Author: eddelbuettel

.github/workflows/ci.yaml

@@ -30,6 +30,11 @@ jobs:
       - name: Setup
         uses: eddelbuettel/github-actions/r-ci@master
 
+      - name: Setup ccache for R
+        uses: eddelbuettel/github-actions/ccache-with-R@master
+        with:
+          key: ${{ matrix.name }}-${{ matrix.openmp }}
+
       - name: Configure
         run: ./configure; cat src/Makevars
 

ChangeLog

@@ -1,3 +1,14 @@
+2026-07-09  Dirk Eddelbuettel  <edd@debian.org>
+
+	* DESCRIPTION (Version, Date): RcppArmadillo 15.4.1-1
+        * inst/NEWS.Rd: Idem
+        * configure.ac: Idem
+        * configure: Idem
+
+	* inst/include/armadillo_bits/: Armadillo 15.4.1
+
+	* .github/workflows/ci.yaml: Enable ccache in matrix
+
 2026-06-18  Dirk Eddelbuettel  <edd@debian.org>
 
 	* DESCRIPTION (Version, Date): RcppArmadillo 15.4.0-1

DESCRIPTION

@@ -1,8 +1,8 @@
 Package: RcppArmadillo
 Type: Package
 Title: 'Rcpp' Integration for the 'Armadillo' Templated Linear Algebra Library
-Version: 15.4.0-1
-Date: 2026-06-17
+Version: 15.4.1-1
+Date: 2026-07-09
 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 15.4.0-1.
+# Generated by GNU Autoconf 2.72 for RcppArmadillo 15.4.1-1.
 #
 # Report bugs to <edd@debian.org>.
 #
@@ -603,8 +603,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='RcppArmadillo'
 PACKAGE_TARNAME='rcpparmadillo'
-PACKAGE_VERSION='15.4.0-1'
-PACKAGE_STRING='RcppArmadillo 15.4.0-1'
+PACKAGE_VERSION='15.4.1-1'
+PACKAGE_STRING='RcppArmadillo 15.4.1-1'
 PACKAGE_BUGREPORT='edd@debian.org'
 PACKAGE_URL=''
 
@@ -1223,7 +1223,7 @@ 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 15.4.0-1 to adapt to many kinds of systems.
+'configure' configures RcppArmadillo 15.4.1-1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1285,7 +1285,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of RcppArmadillo 15.4.0-1:";;
+     short | recursive ) echo "Configuration of RcppArmadillo 15.4.1-1:";;
    esac
   cat <<\_ACEOF
 
@@ -1366,7 +1366,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-RcppArmadillo configure 15.4.0-1
+RcppArmadillo configure 15.4.1-1
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -1482,7 +1482,7 @@ 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 15.4.0-1, which was
+It was created by RcppArmadillo $as_me 15.4.1-1, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3946,7 +3946,7 @@ 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 15.4.0-1, which was
+This file was extended by RcppArmadillo $as_me 15.4.1-1, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -4001,7 +4001,7 @@ ac_cs_config_escaped=`printf "%s\n" "$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 15.4.0-1
+RcppArmadillo config.status 15.4.1-1
 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],[15.4.0-1],[edd@debian.org])
+AC_INIT([RcppArmadillo],[15.4.1-1],[edd@debian.org])
 
 ## Set R_HOME, respecting an environment variable if one is set
 : ${R_HOME=$(R RHOME)}

inst/NEWS.Rd

@@ -3,6 +3,16 @@
 \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 15.4.1-1 [github-only] (2026-07-09)}{
+  \itemize{
+    \item Upgraded to Armadillo release 15.4.1 (Medium Roast Agave)
+    \itemize{
+      \item Fix for rare infinite recursion bug in sparse version of \code{diagmat()}
+      \item More efficient checks for aliasing
+    }
+  }
+}
+
 \section{Changes in RcppArmadillo version 15.4.0-1 (2026-06-17)}{
   \itemize{
     \item Upgraded to Armadillo release 15.4.0 (Medium Roast Agave)

inst/include/armadillo_bits/Mat_bones.hpp

@@ -938,6 +938,12 @@ class Mat<eT>::fixed : public Mat<eT>
   arma_warn_unused arma_inline       eT* memptr();
   arma_warn_unused arma_inline const eT* memptr() const;
 
+  arma_inline       subview_row<eT> row(const uword row_num);
+  arma_inline const subview_row<eT> row(const uword row_num) const;
+  
+  arma_inline       subview_col<eT> col(const uword col_num);
+  arma_inline const subview_col<eT> col(const uword col_num) const;
+  
   arma_warn_unused arma_inline bool is_vec() const;
 
   inline const Mat<eT>& fill(const eT val);

inst/include/armadillo_bits/Mat_meat.hpp

@@ -10746,6 +10746,66 @@ Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::memptr() const
 
 
 
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+subview_row<eT>
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::row(const uword row_num)
+  {
+  arma_debug_sigprint();
+  
+  arma_conform_check_bounds( row_num >= fixed_n_rows, "Mat::row(): index out of bounds" );
+  
+  return subview_row<eT>(*this, row_num);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+const subview_row<eT>
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::row(const uword row_num) const
+  {
+  arma_debug_sigprint();
+  
+  arma_conform_check_bounds( row_num >= fixed_n_rows, "Mat::row(): index out of bounds" );
+  
+  return subview_row<eT>(*this, row_num);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+subview_col<eT>
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::col(const uword col_num)
+  {
+  arma_debug_sigprint();
+  
+  arma_conform_check_bounds( col_num >= fixed_n_cols, "Mat::col(): index out of bounds" );
+  
+  return subview_col<eT>(*this, col_num);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+const subview_col<eT>
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::col(const uword col_num) const
+  {
+  arma_debug_sigprint();
+  
+  arma_conform_check_bounds( col_num >= fixed_n_cols, "Mat::col(): index out of bounds" );
+  
+  return subview_col<eT>(*this, col_num);
+  }
+
+
+
 template<typename eT>
 template<uword fixed_n_rows, uword fixed_n_cols>
 arma_inline

inst/include/armadillo_bits/SpBase_bones.hpp

@@ -52,8 +52,6 @@ struct SpBase
   {
   arma_inline const derived& get_ref() const;
 
-  arma_inline bool is_alias(const SpMat<elem_type>& X) const;
-  
   arma_warn_unused inline const SpOp<derived,spop_htrans>  t() const;  //!< Hermitian transpose
   arma_warn_unused inline const SpOp<derived,spop_htrans> ht() const;  //!< Hermitian transpose
   arma_warn_unused inline const SpOp<derived,spop_strans> st() const;  //!< simple transpose

inst/include/armadillo_bits/SpBase_meat.hpp

@@ -31,16 +31,6 @@ SpBase<elem_type,derived>::get_ref() const
 
 
 
-template<typename elem_type, typename derived>
-arma_inline
-bool
-SpBase<elem_type,derived>::is_alias(const SpMat<elem_type>& X) const
-  {
-  return (*this).get_ref().is_alias(X);
-  }
-
-
-
 template<typename elem_type, typename derived>
 inline
 const SpOp<derived, spop_htrans>