add win and update Rbuildignore

.Rbuildignore

@@ -1,9 +1,18 @@
 ^LICENSE\.md$
-.ccls-cache
-.DS_Store
-tmp
-.Rhistory
-.clangd
+^\.Rhistory$
+^\.clangd$
+^\.clang-format$
 ^README\.Rmd$
 ^cran-comments\.md$
 ^CRAN-SUBMISSION$
+\.github
+^Makefile
+^README.html
+.*\.tar\.gz$
+.*\.tbi$
+^.covrignore$
+^codecov.yaml$
+^\.github$
+^_pkgdown\.yml$
+^docs$
+^pkgdown$

configure.win

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+R_HOME=$(R RHOME)
+
+# Function to detect BLAS library
+detect_blas() {
+    blas_info=$(${R_HOME}/bin/R --slave -e "si <- sessionInfo(); cat(si\$BLAS, '\n', si\$LAPACK)")
+    if echo "$blas_info" | grep -iq "mkl"; then
+        echo "mkl"
+    elif echo "$blas_info" | grep -iq "openblas"; then
+        echo "openblas"
+    else
+        echo "default"
+    fi
+}
+
+# Detect BLAS
+BLAS_TYPE=$(detect_blas)
+
+# OPENBLAS seems sub-optimal
+case $BLAS_TYPE in
+    mkl)
+        echo "Using MKL"
+        BLAS_LAPACK_LIBS="-lmkl_rt"
+        USE_MKL=true
+        USE_OPENBLAS=false
+        USE_LAPACKE=true
+        ;;
+    *)
+        echo "Using default BLAS and LAPACK"
+        BLAS_LAPACK_LIBS="-lblas -llapack"
+        USE_MKL=false
+        USE_OPENBLAS=false
+        USE_LAPACKE=false
+        ;;
+esac
+
+# Create Makevars
+sed -e "s|@BLAS_LAPACK_LIBS@|$BLAS_LAPACK_LIBS|" \
+    -e "s|@USE_MKL@|$USE_MKL|" \
+    -e "s|@USE_OPENBLAS@|$USE_OPENBLAS|" \
+    -e "s|@USE_LAPACKE@|$USE_LAPACKE|" \
+    src/Makevars.in > src/Makevars.win

src/Makevars.in

@@ -1,10 +1,10 @@
 CXX_STD      = CXX17
 PKG_CPPFLAGS = -I../inst/include
+PKG_CXXFLAGS = -DNDEBUG -DEIGEN_PERMANENTLY_DISABLE_STUPID_WARNINGS
 
 ifeq (@USE_MKL@,true)
-	PKG_CXXFLAGS = -DNDEBUG -DEIGEN_PERMANENTLY_DISABLE_STUPID_WARNINGS -DEIGEN_USE_MKL_ALL
+	PKG_CXXFLAGS += -DEIGEN_USE_MKL_ALL
 	PKG_LIBS = @BLAS_LAPACK_LIBS@
 else
-	PKG_CXXFLAGS = -DNDEBUG -DEIGEN_PERMANENTLY_DISABLE_STUPID_WARNINGS
 	PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
 endif