--- configure	2024-10-11 10:50:25.000000000 +0800
+++ configure	2024-11-02 04:49:39.000000000 +0800
@@ -113,8 +113,8 @@
     printf "%s" "* checking if R installation supports OpenMP with \"-Xclang -fopenmp\" ... "
     if CPPFLAGS="${CPPFLAGS} -Xclang -fopenmp" PKG_LIBS="-lomp" "${R_HOME}/bin/R" CMD SHLIB test-omp.c >> config.log 2>&1; then
       echo "yes"
-      export PKG_CFLAGS="${PKG_CFLAGS} -Xclang -fopenmp"
-      export PKG_LIBS="${PKG_LIBS} -lomp"
+      export PKG_CFLAGS="${PKG_CFLAGS} -I@PREFIX@/include/libomp -Xclang -fopenmp"
+      export PKG_LIBS="${PKG_LIBS} -L@PREFIX@/lib/libomp -lomp"
       export R_OPENMP_ENABLED=1
       return
     else
@@ -132,27 +132,6 @@
       echo "no"
     fi
 
-    if [ "$(uname -m)" = "arm64" ]; then
-      HOMEBREW_PREFIX=/opt/homebrew
-    else
-      HOMEBREW_PREFIX=/usr/local
-    fi
-
-    if [ -e "${HOMEBREW_PREFIX}/opt/libomp" ]; then
-      printf "%s" "* checking if libomp installation at ${HOMEBREW_PREFIX}/opt/libomp can be used... "
-      LIBOMP_INCLUDE="-I${HOMEBREW_PREFIX}/opt/libomp/include -Xclang -fopenmp"
-      LIBOMP_LINK="-L${HOMEBREW_PREFIX}/opt/libomp/lib -lomp"
-      if ${CC} ${CFLAGS} ${LIBOMP_INCLUDE} ${LIBOMP_LINK} test-omp.c >> config.log 2>&1; then
-        echo "yes"
-        export PKG_CFLAGS="${PKG_CFLAGS} ${LIBOMP_INCLUDE}"
-        export PKG_LIBS="${PKG_LIBS} ${LIBOMP_LINK}"
-        export R_OPENMP_ENABLED=1
-        return
-      else
-        echo "no"
-      fi
-    fi
-
   fi # uname=Darwin
 
   # No support for OpenMP available