* using log directory 'd:/Rcompile/CRANpkg/local/4.6/ManifoldOptim.Rcheck'
* using R version 4.6.0 beta (2026-04-16 r89899 ucrt)
* using platform: x86_64-w64-mingw32
* R was compiled by
    gcc.exe (GCC) 14.3.0
    GNU Fortran (GCC) 14.3.0
* running under: Windows Server 2022 x64 (build 20348)
* using session charset: UTF-8
* current time: 2026-04-17 15:12:43 UTC
* checking for file 'ManifoldOptim/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'ManifoldOptim' version '1.0.1'
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'ManifoldOptim' can be installed ... ERROR
Installation failed.
See 'd:/Rcompile/CRANpkg/local/4.6/ManifoldOptim.Rcheck/00install.out' for details.
* DONE
The installation logfile:
* installing *source* package 'ManifoldOptim' ...
** this is package 'ManifoldOptim' version '1.0.1'
** package 'ManifoldOptim' successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: 'g++.exe (GCC) 14.3.0'
make[1]: Entering directory '/d/temp/2026_04_17_01_50_00_1722/Rtmp0aDAE9/R.INSTALL52984db31fb3/ManifoldOptim/src'
g++ -std=gnu++20  -I"D:/RCompile/recent/R/include" -DNDEBUG -I../inst/include -IManifolds -IManifolds/Euclidean -IManifolds/Grassmann -IManifolds/L2Sphere -IManifolds/LowRank -IManifolds/Oblique -IManifolds/OrthGroup -IManifolds/PreShapeCurves -IManifolds/Sphere -IManifolds/Stiefel -IManifolds/SPDTensor -IManifolds/CpxNStQOrth -IOthers -IProblems -IProblems/ElasticCurvesRO -IProblems/EucFrechetMean -IProblems/EucQuadratic -IProblems/GrassRQ -IProblems/ObliqueTestSparsePCA -IProblems/PreShapePathStraighten -IProblems/SPDMean -IProblems/SPDTensorDL -IProblems/StieBrockett -IProblems/StieSoftICA -IProblems/StieSumBrockett -IProblems/WeightedLowrank -ISolvers -IManifoldOptim -DR_BUILD -DARMA_DONT_USE_BLAS -DARMA_DONT_USE_LAPACK -fpermissive -std=c++0x -Wno-unused-variable -Wno-unused-function -Wno-sign-compare -Wno-uninitialized -Wno-unused-but-set-variable -Wno-sequence-point -DARMA_DONT_USE_CXX11  -I'D:/RCompile/CRANpkg/lib/4.6/Rcpp/include' -I'D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include'   -I"d:/rtools45/x86_64-w64-mingw32.static.posix/include"      -pedantic -O2 -Wall  -mfpmath=sse -msse2 -mstackrealign    -c MyRcppExports.cpp -o MyRcppExports.o
In file included from D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/RcppArmadillo.h:29,
                 from MyRcppExports.cpp:2:
D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/RcppArmadillo/version/arma.h:66:199: note: '#pragma message: Using fallback compilation with Armadillo 14.6.3. Please consider defining -DARMA_USE_CURRENT and also removing C++11 compilation directive. See GitHub issue #475 for more.'
   66 |         #pragma message("Using fallback compilation with Armadillo 14.6.3. Please consider defining -DARMA_USE_CURRENT and also removing C++11 compilation directive. See GitHub issue #475 for more.")
      |                                                                                                                                                                                                       ^
In file included from D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/legacy/armadillo:27,
                 from D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/RcppArmadillo/interface/RcppArmadilloForward.h:80,
                 from D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/RcppArmadillo.h:32:
D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/legacy/armadillo_bits/compiler_check.hpp:77:65: note: '#pragma message: WARNING: option ARMA_DONT_USE_CXX11 ignored'
   77 |   #pragma message ("WARNING: option ARMA_DONT_USE_CXX11 ignored")
      |                                                                 ^
In file included from D:/RCompile/CRANpkg/lib/4.6/Rcpp/include/Rcpp.h:49,
                 from D:/RCompile/CRANpkg/lib/4.6/RcppArmadillo/include/RcppArmadillo.h:35:
D:/RCompile/CRANpkg/lib/4.6/Rcpp/include/Rcpp/Function.h: In constructor 'Rcpp::Function_Impl<StoragePolicy>::Function_Impl(const std::string&, const std::string&)':
D:/RCompile/CRANpkg/lib/4.6/Rcpp/include/Rcpp/Function.h:75:65: error: 'R_NamespaceRegistry' was not declared in this scope
   75 |             Shield<SEXP> env(R_getVarEx(Rf_install(ns.c_str()), R_NamespaceRegistry, FALSE, R_UnboundValue));
      |                                                                 ^~~~~~~~~~~~~~~~~~~
make[1]: *** [D:/RCompile/recent/R/etc/x64/Makeconf:304: MyRcppExports.o] Error 1
make[1]: Leaving directory '/d/temp/2026_04_17_01_50_00_1722/Rtmp0aDAE9/R.INSTALL52984db31fb3/ManifoldOptim/src'
ERROR: compilation failed for package 'ManifoldOptim'
* removing 'd:/Rcompile/CRANpkg/lib/4.6/ManifoldOptim'
* restoring previous 'd:/Rcompile/CRANpkg/lib/4.6/ManifoldOptim'