Hello there,
I'm new to R and hoping, that someone can help me 
. After quite some research I havent found anyone facing a similar problem.
I'm facing trouble with installing certain packages, which are dependencies for tidyverse and ggplot, like stringi. I installed R via homebrew and I also installed gcc and xcode.
When I try to install stringi I get the following Error:
(I cant use reprex since it depends on stringi ...)
sessionInfo:
R version 3.5.3 (2019-03-11)
Platform: x86_64-apple-darwin18.2.0 (64-bit)
Running under: macOS Mojave 10.14.4
Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /usr/local/Cellar/openblas/0.3.5/lib/libopenblasp-r0.3.5.dylib
locale:
[1] de_DE.UTF-8/de_DE.UTF-8/de_DE.UTF-8/C/de_DE.UTF-8/de_DE.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.5.3 tools_3.5.3
Error:
* installing *source* package ‘stringi’ ...
** Paket ‘stringi’ erfolgreich entpackt und MD5 Summen überprüft
checking for R_HOME... /usr/local/Cellar/r/3.5.3/lib/R
checking for R... /usr/local/Cellar/r/3.5.3/lib/R/bin/R
checking for endianness... little
checking for R >= 3.1.0 for C++11 use... yes
checking for R < 3.4.0 for CXX1X flag use... no
checking for cat... /bin/cat
checking for local ICUDT_DIR... icu61/data
checking for gcc... clang
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 accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking how to run the C preprocessor... clang++ -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... rm: conftest.dSYM: is a directory
rm: conftest.dSYM: is a directory
yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking elf.h usability... no
checking elf.h presence... no
checking for elf.h... no
checking whether we are using the GNU C++ compiler... yes
checking whether clang++ -std=gnu++11 accepts -g... yes
checking whether the C++ compiler supports the long long type... yes
checking whether the compiler implements namespaces... yes
checking whether the compiler supports Standard Template Library... yes
checking whether std::map is available... yes
checking for pkg-config... no
*** pkg-config could not be found
*** Trying with "standard" fallback flags
checking whether we may build an ICU4C-based project... no
*** The available ICU4C cannot be used
checking whether we may compile src/icu61/common/putil.cpp... yes
checking whether we may compile src/icu61/i18n/number_affixutils.cpp... yes
checking whether we can fetch icudt... downloading the ICU data library (icudt)
output path: icu61/data/icudt61l.zip
trying URL 'http://www.ibspan.waw.pl/~gagolews/stringi/icudt61l.zip'
Content type 'application/zip' length 10791080 bytes (10.3 MB)
==================================================
downloaded 10.3 MB
icudt fetch successful
configure: creating ./config.status
config.status: creating src/Makevars
config.status: creating src/uconfig_local.h
config.status: creating src/install.libs.R
*** stringi configure summary:
ICU_FOUND=0
ICUDT_DIR=icu61/data
ICU_BUNDLE_VERSION=61
ICUDT_ENDIANNESS=little
STRINGI_CXXSTD=CXX_STD=CXX11
STRINGI_CFLAGS= -fPIC
STRINGI_CPPFLAGS=-I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG
STRINGI_CXXFLAGS= -fPIC
STRINGI_LDFLAGS=
STRINGI_LIBS=
*** compiler settings used:
CC=clang
CPP=clang++ -E
LD=clang++
CFLAGS=-g -O2 -fPIC
CPPFLAGS=-I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -UDEBUG -DNDEBUG
CXX=clang++ -std=gnu++11
CXXFLAGS=-g -O2 -fPIC
LDFLAGS=
LIBS=
** libs
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_brkiter.cpp -o stri_brkiter.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_collator.cpp -o stri_collator.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_common.cpp -o stri_common.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_compare.cpp -o stri_compare.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_container_base.cpp -o stri_container_base.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_container_bytesearch.cpp -o stri_container_bytesearch.o
clang++ -std=gnu++11 -I"/usr/local/Cellar/r/3.5.3/lib/R/include" -DNDEBUG -I. -Iicu61 -Iicu61/unicode -Iicu61/common -Iicu61/i18n -DU_STATIC_IMPLEMENTATION -DU_COMMON_IMPLEMENTATION -DU_I18N_IMPLEMENTATION -DUCONFIG_USE_LOCAL -UDEBUG -DNDEBUG -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include -fPIC -fPIC -g -O2 -c stri_container_listint.cpp -o stri_container_listint.o
make: *** [stri_container_listint.o] Interrupt: 2
ERROR: compilation failed for package ‘stringi’
* removing ‘/usr/local/lib/R/3.5/site-library/stringi’