R version 4.0.2 (2020-06-22) -- "Taking Off Again"
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Platform: x86_64-apple-darwin17.0 (64-bit)

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> .libPaths("/Library/Frameworks/R.Framework/Packages")
> remove.packages(c("Rcpp", "RcppArmadillo"))
Removing packages from ‘/Library/Frameworks/R.framework/Packages’
(as ‘lib’ is unspecified)
> install.packages(c("Rcpp", "RcppArmadillo"), type = "source")
Installing packages into ‘/Library/Frameworks/R.framework/Packages’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/src/contrib/Rcpp_1.0.5.tar.gz'
Content type 'application/x-gzip' length 2950521 bytes (2.8 MB)
==================================================
downloaded 2.8 MB

trying URL 'https://cran.rstudio.com/src/contrib/RcppArmadillo_0.9.900.2.0.tar.gz'
Content type 'application/x-gzip' length 1645254 bytes (1.6 MB)
==================================================
downloaded 1.6 MB

* installing *source* package ‘Rcpp’ ...
** package ‘Rcpp’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c api.cpp -o api.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c attributes.cpp -o attributes.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c barrier.cpp -o barrier.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c date.cpp -o date.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c module.cpp -o module.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I../inst/include/  -I/usr/local/include   -fPIC  -Wall -g -O2  -c rcpp_init.cpp -o rcpp_init.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o Rcpp.so api.o attributes.o barrier.o date.o module.o rcpp_init.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
installing to /Library/Frameworks/R.framework/Packages/00LOCK-Rcpp/00new/Rcpp/libs
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
** checking absolute paths in shared objects and dynamic libraries
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (Rcpp)
* installing *source* package ‘RcppArmadillo’ ...
** package ‘RcppArmadillo’ successfully unpacked and MD5 sums checked
** using staged installation
checking whether the C++ compiler works... yes
checking for C++ compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler... yes
checking whether clang++ -mmacosx-version-min=10.13 -std=gnu++11 accepts -g... yes
checking how to run the C++ preprocessor... clang++ -mmacosx-version-min=10.13 -std=gnu++11 -E
checking whether we are using the GNU C++ compiler... (cached) yes
checking whether clang++ -mmacosx-version-min=10.13 -std=gnu++11 accepts -g... (cached) yes
checking whether we have a suitable tempdir... /var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T
checking whether R CMD SHLIB can already compile programs using OpenMP... no
checking whether g++ version is sufficient... almost
configure: WARNING: Compiler self-identifies as being compliant with GNUC extensions but is not g++.
checking for macOS... found
checking for macOS Apple compiler... not found
checking for clang compiler... found
checking for OpenMP compatible version of clang... not found
configure: WARNING: OpenMP unavailable and turned off.
checking LAPACK_LIBS... R-supplied partial LAPACK found
configure: WARNING: Some complex-valued LAPACK functions may not be available
configure: creating ./config.status
config.status: creating inst/include/RcppArmadilloConfigGenerated.h
config.status: creating src/Makevars
** libs
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Library/Frameworks/R.framework/Packages/Rcpp/include' -I/usr/local/include  -I../inst/include  -fPIC  -Wall -g -O2  -c RcppArmadillo.cpp -o RcppArmadillo.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Library/Frameworks/R.framework/Packages/Rcpp/include' -I/usr/local/include  -I../inst/include  -fPIC  -Wall -g -O2  -c RcppExports.cpp -o RcppExports.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Library/Frameworks/R.framework/Packages/Rcpp/include' -I/usr/local/include  -I../inst/include  -fPIC  -Wall -g -O2  -c fastLm.cpp -o fastLm.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o RcppArmadillo.so RcppArmadillo.o RcppExports.o fastLm.o -L/Library/Frameworks/R.framework/Resources/lib -lRlapack -L/Library/Frameworks/R.framework/Resources/lib -lRblas -L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin18/8.2.0 -L/usr/local/gfortran/lib -lgfortran -lquadmath -lm -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
installing to /Library/Frameworks/R.framework/Packages/00LOCK-RcppArmadillo/00new/RcppArmadillo/libs
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
** checking absolute paths in shared objects and dynamic libraries
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (RcppArmadillo)

The downloaded source packages are in
	‘/private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/downloaded_packages’
> Rcpp::evalCpp("1 + 1", verbose = TRUE)

Generated code for function definition: 
--------------------------------------------------------

#include <Rcpp.h>

using namespace Rcpp;

// [[Rcpp::export]]
SEXP get_value(){ return wrap( 1 + 1 ) ; }

Generated extern "C" functions 
--------------------------------------------------------


#include <Rcpp.h>
// get_value
SEXP get_value();
RcppExport SEXP sourceCpp_1_get_value() {
BEGIN_RCPP
    Rcpp::RObject rcpp_result_gen;
    Rcpp::RNGScope rcpp_rngScope_gen;
    rcpp_result_gen = Rcpp::wrap(get_value());
    return rcpp_result_gen;
END_RCPP
}

Generated R functions 
-------------------------------------------------------

`.sourceCpp_1_DLLInfo` <- dyn.load('/private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/sourceCpp-x86_64-apple-darwin17.0-1.0.5/sourcecpp_275a2a9c550c/sourceCpp_2.so')

get_value <- Rcpp:::sourceCppFunction(function() {}, FALSE, `.sourceCpp_1_DLLInfo`, 'sourceCpp_1_get_value')

rm(`.sourceCpp_1_DLLInfo`)

Building shared library
--------------------------------------------------------

DIR: /private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/sourceCpp-x86_64-apple-darwin17.0-1.0.5/sourcecpp_275a2a9c550c

/Library/Frameworks/R.framework/Resources/bin/R CMD SHLIB -o 'sourceCpp_2.so' 'file275a5799aeb2.cpp' 
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I"/Library/Frameworks/R.framework/Packages/Rcpp/include" -I"/private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/sourceCpp-x86_64-apple-darwin17.0-1.0.5" -I/usr/local/include   -fPIC  -Wall -g -O2  -c file275a5799aeb2.cpp -o file275a5799aeb2.o
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Library/Frameworks/R.framework/Resources/lib -L/usr/local/lib -o sourceCpp_2.so file275a5799aeb2.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
[1] 2
> Rcpp::sourceCpp('/Users/itpetersen/Desktop/helloworld.cpp', verbose = TRUE)

Generated extern "C" functions 
--------------------------------------------------------


#include <Rcpp.h>

Generated R functions 
-------------------------------------------------------

`.sourceCpp_3_DLLInfo` <- dyn.load('/private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/sourceCpp-x86_64-apple-darwin17.0-1.0.5/sourcecpp_275a7d939cae/sourceCpp_4.so')


rm(`.sourceCpp_3_DLLInfo`)

Building shared library
--------------------------------------------------------

DIR: /private/var/folders/p5/tkdpnffs2_g5ybr2t1yq1nd0rq_9pt/T/Rtmp3PiDrA/sourceCpp-x86_64-apple-darwin17.0-1.0.5/sourcecpp_275a7d939cae

/Library/Frameworks/R.framework/Resources/bin/R CMD SHLIB -o 'sourceCpp_4.so' 'helloworld.cpp' 
clang++ -mmacosx-version-min=10.13 -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I"/Library/Frameworks/R.framework/Packages/Rcpp/include" -I"/Users/itpetersen/Desktop" -I/usr/local/include   -fPIC  -Wall -g -O2  -c helloworld.cpp -o helloworld.o
helloworld.cpp:1:10: fatal error: 'RcppArmadillo.h' file not found
#include <RcppArmadillo.h>   
         ^~~~~~~~~~~~~~~~~
1 error generated.
make: *** [helloworld.o] Error 1
Error in Rcpp::sourceCpp("/Users/itpetersen/Desktop/helloworld.cpp", verbose = TRUE) : 
  Error 1 occurred building shared library.
> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Catalina 10.15.6

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_4.0.2 tools_4.0.2    Rcpp_1.0.5