无法安装RMySQL包，错误c:/Rtools/mingw_32/bin/gcc:找不到

Question

我使用的是Windows10，将MySQL安装在"C:\Program Files\MySQL\MySQL Server5.7“下，将R安装在"D:\R\R-3.3.2”下，将Rtools安装在"D:\Rtools“下，将RStudio安装在"D:\RStudio”下。然后，我按照以下步骤安装RMySQL包：

1:在我的环境变量中增加了MYSQL_HOME = C:\Program Files\MySQL\MySQL Server5.7\。

2:在"D:\R\R-3.3.2\etc“下创建Renviron.site文件，内容为: MYSQL_HOME=C:/Program Files/MySQL/MySQL Server 5.7/

3:已验证我的环境变量->系统变量下的PATH值是否执行contain:D:\Rtools\bin;D:\Rtools\mingw_32\bin;...

4:在RStudio上运行install.packages("RMySQL"，type = "source")。

但我收到以下错误消息：

> install.packages("RMySQL", type = "source")
trying URL 'https://cran.rstudio.com/src/contrib/RMySQL_0.10.9.tar.gz'
Content type 'application/x-gzip' length 54012 bytes (52 KB)
downloaded 52 KB

* installing *source* package 'RMySQL' ...
** 成功将'RMySQL'程序包解包并MD5和检查
** libs

*** arch - i386
rm -f RMySQL-init.o connection.o db-apply.o driver.o exception.o fields.o result.o utils.o RMySQL.dll
"D:/R/R-3.3.2/bin/i386/Rscript.exe" "../tools/winlibs.R"
c:/Rtools/mingw_32/bin/gcc  -I"D:/R/R-3.3.2/include" -DNDEBUG -I../windows/libmariadbclient-2.1.0/include    -I"d:/Compiler/gcc-4.9.3/local330/include"     -O3 -Wall  -std=gnu99 -mtune=core2 -c RMySQL-init.c -o RMySQL-init.o
c:/Rtools/mingw_32/bin/gcc: not found
make: *** [RMySQL-init.o] Error 127
Warning: 运行命令'make -f "Makevars.win" -f "D:/R/R-3.3.2/etc/i386/Makeconf" -f "D:/R/R-3.3.2/share/make/winshlib.mk" SHLIB="RMySQL.dll" OBJECTS="RMySQL-init.o connection.o db-apply.o driver.o exception.o fields.o result.o utils.o"' had status 2
ERROR: compilation failed for package 'RMySQL'
* removing 'D:/R/R-3.3.2/library/RMySQL'
Warning in install.packages :
  running command '"D:/R/R-3.3.2/bin/x64/R" CMD INSTALL -l "D:\R\R-3.3.2\library" C:\Users\Xuan\AppData\Local\Temp\RtmpkjaBSm/downloaded_packages/RMySQL_0.10.9.tar.gz' had status 1
Warning in install.packages :
  installation of package ‘RMySQL’ had non-zero exit status

The downloaded source packages are in
    ‘C:\Users\Xuan\AppData\Local\Temp\RtmpkjaBSm\downloaded_packages’

我看到错误消息说"c:/ RTools /mingw_32/bin/gcc:找不到“，这可能是因为我在D盘下安装了RTools。我可以成功安装其他R包(这意味着可以在R中使用Rtools )，但是我不知道为什么这个安装得到了错误的路径。有人能帮助解决这个问题吗？非常感谢!

Answer 1

已通过将整个Rtools文件夹复制到C驱动器修复此问题。R可以正确加载RMySQL包，虽然这消耗了我的系统驱动器相当多的空间。