Uwe, I set the variable with single backslashes, but the output remains the same. The last part reads:
"gcc -m64 -shared -s -static-libgcc -o RMySQL.dll tmp.def RS-DBI.o RS-MySQL.o C:\Program Files\MySQL\MySQL Server 5.5/bin/libmysql.dll -Ld:/RCompile/CRANpkg/extralibs64/local/lib/x64 -Ld:/Rcompile/CRANpkg/extralibs64/local/lib -LC:/PROGRA~1/R/R-215~1.1/BIN/X64 -lR gcc.exe: error: C:\Program Files\MySQL\MySQL Server 5.5/bin/libmySQL.dll: No such file or directory ERROR: compilation failed for package 'RMySQL' * removing 'C:/Users/Acer/Documents/R/win-library/2.15/RMySQL' " -- View this message in context: http://r.789695.n4.nabble.com/RMySQL-install-on-windows-tp4645629p4649590.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.