Hello all - first time poster long time reader, I'm currently working on a package, and was interested to compare performance with and without gcc/g++ -O based optimization. I can turn the -O flags off with a ~.R/Makevars file, but when I do something odd happens. The package installs fine when gcc is fed -O2 or -O3
*install with* R CMD INSTALL --configure-args="CFLAGS=-g CXXFLAGS=-g --disable-openmp" package.tar.gz /NB: I have opnemp switched off here as it's not supported by Apple's GCC (4.2.1). When the code runs on a linux cluster it compiles with openmp and runs no problem./ *makevars file* CC = gcc -arch x86_64 -std=gnu99 CFLAGS = -g -O2 $(LTO) /# with -O2 we compile fine / CPICFLAGS = -fPIC CPPFLAGS = -I/usr/local/include CXX = g++ -arch x86_64 CXXCPP = g++ -arch x86_64 -E CXXFLAGS = -g $(LTO) CXXPICFLAGS = -fPIC ... compiles and installs no problem. However, if I remove the -O (or use -O0, -O1) it fails with the following error ** preparing package for lazy loading ** help *** installing help indices ** building package indices ** testing if installed package can be loaded Error in dyn.load(file, DLLpath = DLLpath, ...) : unable to load shared object '/Users/alex/Library/R/2.15/library/citpp/libs/x86_64/citpp.so': dlopen(/Users/alex/Library/R/2.15/library/citpp/libs/x86_64/citpp.so, 6): Symbol not found: _mymax Referenced from: /Users/alex/Library/R/2.15/library/citpp/libs/x86_64/citpp.so Expected in: flat namespace in /Users/alex/Library/R/2.15/library/citpp/libs/x86_64/citpp.so Error: loading failed Execution halted ERROR: loading failed * removing ‘/Users/alex/Library/R/2.15/library/citpp’ * restoring previous ‘/Users/alex/Library/R/2.15/library/citpp’ This isn't a huge problem (for me, right now), but I don't understand why changing the compiler optimization level to less optimization would cause a dyn.load error? I can remove the optimization flag from g++ no problem. Any advice or ideas would be appreciated! -- View this message in context: http://r.789695.n4.nabble.com/Lack-of-O2-or-O-gcc-compiler-flag-causes-package-installation-failure-tp4632723.html Sent from the R devel mailing list archive at Nabble.com. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
