Warnings when installing R package with Rcpp - rcpp

Question

I am tring to build an R package with Rcpp using Rstudio. When I click "install and restart", Rstudio outputs hundreds of warning information and I cannot easily find the error information. I tried to find out reason to avoid the warning information but failed. It seems the warnings are from Rcpp package. BTW, the package can still work.
The below is the additional options for R CMD INSTALL
--no-multiarch --with-keep.source
The information can be replicated using the below commands
library(devtools) # author version: 2.3.0, use install.packages("devtools") first
install_github("GeneticAnalysisinBiobanks/GRAB", INSTALL_opts=c("--no-multiarch")) # The INSTALL_opts is required in Windows OS.
My working environment:
> sessionInfo()
R version 4.1.0 (2021-05-18)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19042)
Matrix products: default
locale:
[1] LC_COLLATE=Chinese (Simplified)_China.936 LC_CTYPE=Chinese (Simplified)_China.936
[3] LC_MONETARY=Chinese (Simplified)_China.936 LC_NUMERIC=C
[5] LC_TIME=Chinese (Simplified)_China.936
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] devtools_2.4.2 usethis_2.0.1
loaded via a namespace (and not attached):
[1] rstudioapi_0.13 magrittr_2.0.1 pkgload_1.2.1 R6_2.5.0
[5] rlang_0.4.11 fastmap_1.1.0 tools_4.1.0 pkgbuild_1.2.0
[9] sessioninfo_1.1.1 cli_3.0.0 withr_2.4.2 ellipsis_0.3.2
[13] remotes_2.4.0 rprojroot_2.0.2 lifecycle_1.0.0 crayon_1.4.1
[17] processx_3.5.2 purrr_0.3.4 callr_3.7.0 fs_1.5.0
[21] ps_1.6.0 curl_4.3.1 testthat_3.0.4 memoise_2.0.0
[25] glue_1.4.2 cachem_1.0.5 compiler_4.1.0 desc_1.3.0
[29] prettyunits_1.1.1
The below include the warning information when I install and restart the package.
In file included from C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/RcppCommon.h:118,
from C:/Users/wenjianb/Documents/R/win-library/4.1/RcppArmadillo/include/RcppArmadilloForward.h:26,
from C:/Users/wenjianb/Documents/R/win-library/4.1/RcppArmadillo/include/RcppArmadillo.h:31,
from RcppExports.cpp:4:
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h: In function 'const char* Rcpp::type2name(SEXP)':
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:70:73: warning: cast between incompatible function types from 'DL_FUNC' {aka 'void* (*)()'} to 'Fun' {aka 'const char* (*)(SEXPREC*)'} [-Wcast-function-type]
#define GET_CALLABLE(__FUN__) (Fun) R_GetCCallable( "Rcpp", __FUN__ )
^
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:74:26: note: in expansion of macro 'GET_CALLABLE'
static Fun fun = GET_CALLABLE("type2name");
^~~~~~~~~~~~
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h: In function 'long unsigned int Rcpp::internal::enterRNGScope()':
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:70:73: warning: cast between incompatible function types from 'DL_FUNC' {aka 'void* (*)()'} to 'Fun' {aka 'long unsigned int (*)()'} [-Wcast-function-type]
#define GET_CALLABLE(__FUN__) (Fun) R_GetCCallable( "Rcpp", __FUN__ )
^
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:81:30: note: in expansion of macro 'GET_CALLABLE'
static Fun fun = GET_CALLABLE("enterRNGScope");
^~~~~~~~~~~~
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h: In function 'long unsigned int Rcpp::internal::exitRNGScope()':
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:70:73: warning: cast between incompatible function types from 'DL_FUNC' {aka 'void* (*)()'} to 'Fun' {aka 'long unsigned int (*)()'} [-Wcast-function-type]
#define GET_CALLABLE(__FUN__) (Fun) R_GetCCallable( "Rcpp", __FUN__ )
^
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:87:30: note: in expansion of macro 'GET_CALLABLE'
static Fun fun = GET_CALLABLE("exitRNGScope");
^~~~~~~~~~~~
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h: In function 'long unsigned int Rcpp::internal::beginSuspendRNGSynchronization()':
C:/Users/wenjianb/Documents/R/win-library/4.1/Rcpp/include/Rcpp/routines.h:70:73: warning: cast between incompatible function types from 'DL_FUNC' {aka 'void* (*)()'} to 'Fun' {aka 'long unsigned int (*)()'} [-Wcast-function-type]
#define GET_CALLABLE(__FUN__) (Fun) R_GetCCallable( "Rcpp", __FUN__ )
^
The other warnings are all similar to the above.
Thank you all in advance.
Wenjian