在为4.0.2。安装吸墨纸时遇到困难。

我运行以下代码：

require(devtools)
install_github("braverock/blotter") 
install_github("braverock/quantstrat")

我收到以下错误消息：

  Failed to install 'blotter' from GitHub:
  (converted from warning) installation of package ‘/var/folders/7f/fzwn25053j3bp0yd_7swzf540000gn/T//Rtmp5kiwSh/file14db938bb63bf/blotter_0.15.0.tar.gz’ had non-zero exit status

我已经成功安装了xts，PerformanceAnalytics和FinancialInstrument。我还安装了开发工具Clang 8.0（尽管我相信R 4.0和更高版本中不再需要此工具。）

感谢您的帮助。预先感谢。

编辑-全部输出：

clang -I"/library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c calcPosAvgCost.c -o calcPosAvgCost.o
calcPosAvgCost.c:31:12: warning: using integer absolute value function 'abs' when argument is of floating point type [-wabsolute-value]
        if(abs(d_PrevPosQty) > abs(d_PosQty[i])){
           ^
calcPosAvgCost.c:31:12: note: use function 'fabs' instead
        if(abs(d_PrevPosQty) > abs(d_PosQty[i])){
           ^~~
           fabs
calcPosAvgCost.c:31:32: warning: using integer absolute value function 'abs' when argument is of floating point type [-wabsolute-value]
        if(abs(d_PrevPosQty) > abs(d_PosQty[i])){
                               ^
calcPosAvgCost.c:31:32: note: use function 'fabs' instead
        if(abs(d_PrevPosQty) > abs(d_PosQty[i])){
                               ^~~
                               fabs
2 warnings generated.
clang -I"/library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/usr/local/include   -fPIC  -Wall -g -O2  -c init.c -o init.o
clang -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o blotter.so calcPosAvgCost.o init.o -F/library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
installing to /library/Frameworks/R.framework/Versions/4.0/Resources/library/00LOCK-blotter/00new/blotter/libs
** R
** data
*** moving datasets to lazyload DB
** demo
** byte-compile and prepare package for lazy loading
Error: (converted from warning) package ‘xts’ was built under R version 4.0.2
Execution halted
ERROR: lazy loading failed for package ‘blotter’
* removing ‘/library/Frameworks/R.framework/Versions/4.0/Resources/library/blotter’
Error: Failed to install 'blotter' from GitHub:
  (converted from warning) installation of package ‘/var/folders/7f/fzwn25053j3bp0yd_7swzf540000gn/T//Rtmp5kiwSh/file14db956d7f3bb/blotter_0.15.0.tar.gz’ had non-zero exit status