I experienced similar issues on Mac and was able to fix by adding PKG_CPPFLAGS=-I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include to my .R/Makevars
My understanding is that Mac no longer uses the /usr/local/include so you need to point it to the usr/include in the Developer SDK folder On Sun, May 3, 2020 at 8:59 AM Paul Fishwick <metaph...@gmail.com> wrote: > > > System: Mac OSX 11 (Catalina), Rstudio with R version 3.6.3 (but have also > tried 4.0 and 3.3), > Xcode version 11.4.1 > > Went to: http://adv-r.had.co.nz/Rcpp.html#rcpp-intro > > and tried library(rcpp) which worked fine because I previously had > installed the rcpp package. > > The following yields an error in finding config.h. I did a "find" on > config.h and sure enough it is not > in the clang++ -I directory references. Here is what I have tried: > > Installing Xcode's command line tools (which were installed using > xcode-select --install) > Also, downloaded and installed the version of clang8 and gfortran6.1 from: > > https://cran.r-project.org/bin/macosx/tools/ > > The following error occurs when I try this rcpp example from Hadley but it > also happens whenever > I try to install an R package from source. The compile fails due to not > finding some include file. > > I would have thought that installing clang8 would have also included the > proper include (.h) file directories > with their contents needed by R. > > Is there something I am missing below? Thank you. > > > library(Rcpp) > > cppFunction('int add(int x, int y, int z) { > + int sum = x + y + z; > + return sum; > + }') > In file included from fileb6e52d3a23c3.cpp:1: > In file included from > /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp.h:27: > In file included from > /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/RcppCommon.h:29: > In file included from > /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp/r/headers.h:67: > In file included from > /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp/platform/compiler.h:100: > In file included from > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:304: > In file included from /usr/local/include/math.h:8: > In file included from /usr/local/include/features.h:10: > /usr/local/include/forwards.h:10:10: fatal error: 'config.h' file not found > #include "config.h" > ^~~~~~~~~~ > 1 error generated. > make: *** [fileb6e52d3a23c3.o] Error 1 > clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" > -DNDEBUG > -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" > -I"/private/var/folders/bt/1gd00p5s6n19m_bgh9b04gxc0000gp/T/RtmpRRyaky/sourceCpp-x86_64-apple-darwin15.6.0-1.0.4" > -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk > -I/usr/local/include -fPIC -Wall -g -O2 -c fileb6e52d3a23c3.cpp -o > fileb6e52d3a23c3.o > Error in sourceCpp(code = code, env = env, rebuild = rebuild, cacheDir = > cacheDir, : > Error 1 occurred building shared library. > > > _______________________________________________ > Rcpp-devel mailing list > Rcpp-devel@lists.r-forge.r-project.org > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
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