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When I try to compile a C++ script in R using Rcpp, I got the following error message:

Error in dyn.load("/private/var/folders/46/1tz_54_n3glfmgftvqsspwrr0000gn/T/RtmprF007X/sourceCpp-x86_64-apple-darwin17.0-1.0.6/sourcecpp_438303cc5b8/sourceCpp_4.so") : 
  unable to load shared object '/private/var/folders/46/1tz_54_n3glfmgftvqsspwrr0000gn/T/RtmprF007X/sourceCpp-x86_64-apple-darwin17.0-1.0.6/sourcecpp_438303cc5b8/sourceCpp_4.so':
  dlopen(/private/var/folders/46/1tz_54_n3glfmgftvqsspwrr0000gn/T/RtmprF007X/sourceCpp-x86_64-apple-darwin17.0-1.0.6/sourcecpp_438303cc5b8/sourceCpp_4.so, 6): Symbol not found: ___addtf3
  Referenced from: /usr/local/lib/libquadmath.0.dylib
  Expected in: /usr/local/lib/libgcc_s_x86_64.1.dylib
 in /usr/local/lib/libquadmath.0.dylib

The problem looks just related to compiling a script, since a simple command as Rcpp::evalCpp("1 + 1") works.

My system is MacOS 10.15.7, the Xcode version is 11.4 and when I type gcc --version it returns

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 11.0.3 (clang-1103.0.32.29)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
Andrea Sottosanti
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  • Please check all the documentation for macOS as just suggested [in this SO question days ago](https://stackoverflow.com/questions/67911457/rstudio-on-my-macos-big-sur-cant-install-r-package-from-source-or-cant-open-a). Using `evalCpp()` is a good first step, next maybe try to build and install a small known-working package. It may still be a linker or setup issue at your end. – Dirk Eddelbuettel Jun 16 '21 at 12:01

0 Answers0