install.packages("Rglpk") Installing package into '/private/var/folders/wv/ts_skhj91nqg7cdxdggxgj_m0000gn/T/RtmpHpie9Q/downloaded_packages' (as 'lib' is unspecified) Package which is only available in source form, and may need compilation of C/C++/Fortran: 'Rglpk' Do you want to attempt to install these from sources? y/n: y installing the source package 'Rglpk'
trying URL 'https://cran.rstudio.com/src/contrib/Rglpk_0.6-3.tar.gz'
Content type 'application/x-gzip' length 20892 bytes (20 KB)
downloaded 20 KB
During startup - Warning messages: 1: Setting LC_CTYPE failed, using "C" 2: Setting LC_TIME failed, using "C" 3: Setting LC_MESSAGES failed, using "C" 4: Setting LC_MONETARY failed, using "C" Warning in strptime(xx, f <- "%Y-%m-%d %H:%M:%OS", tz = tz) : unknown timezone 'zone/tz/2017c.1.0/zoneinfo/Asia/Hong_Kong' * installing source package 'Rglpk' ... ** package 'Rglpk' successfully unpacked and MD5 sums checked ** libs xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun ERROR: compilation failed for package 'Rglpk' * removing '/private/var/folders/wv/ts_skhj91nqg7cdxdggxgj_m0000gn/T/RtmpHpie9Q/downloaded_packages/Rglpk' Warning in install.packages : installation of package 'Rglpk' had non-zero exit status
The downloaded source packages are in '/private/var/folders/wv/ts_skhj91nqg7cdxdggxgj_m0000gn/T/RtmpHpie9Q/downloaded_packages'
I already tried using homebrew to install glpk. Still, I get this error message.
