Problem installing libxml2 under Homebrew
You probably have a malconfigured homebrew installation of R. On MacOS it is recommended to use the CRAN version of R https://cran.r-project.org/bin/macosx/. The homebrew version depends on gcc compilers and does not support cran binary packages. If you really want to use the homebrew R try ruling out the following problems: - Check for conflicting compilers in your path (gcc, ccache, clang4). Unless you have good reasons not to, you should use the native xcode compilers to build R packages. - Comment out custom compilers/flags that you may have in your ~/.R/Makevars file. Use the following script to check why the configuration is failing: CPP=$(R CMD config CPP) CFLAGS=$(xml2-config --cflags) echo '#include <libxml/tree.h>' | $CPP $CFLAGS -E -xc - > /dev/null On Sat, Feb 17, 2018 at 8:53 AM, Peter Meilstrup
<peter.meilstrup at gmail.com> wrote:
i am trying to install xml2 from CRAN, and it is throwing an error that it cannot find the libxml2 library configuration. The thing is that pkg-config seems to be set up correctly: $ echo $PKG_CONFIG_PATH :/usr/local/opt/libxml2/lib/pkgconfig:/usr/local/opt/libxml2/lib/pkgconfig $ pkg-config --cflags --libs libxml-2.0 -I/usr/local/Cellar/libxml2/2.9.7/include/libxml2 -L/usr/local/Cellar/libxml2/2.9.7/lib -lx Output of install.packages:
install.packages("xml2")
--- Please select a CRAN mirror for use in this session --- trying URL 'https://cloud.r-project.org/src/contrib/xml2_1.2.0.tar.gz' Content type 'application/x-gzip' length 251614 bytes (245 KB) ================================================== downloaded 245 KB * installing *source* package ?xml2? ... ** package ?xml2? successfully unpacked and MD5 sums checked Found pkg-config cflags and libs! Using PKG_CFLAGS=-I/usr/include/libxml2 Using PKG_LIBS=-L/usr/lib -lxml2 -lz -lpthread -licucore -lm ------------------------- ANTICONF ERROR --------------------------- Configuration failed because libxml-2.0 was not found. Try installing: * deb: libxml2-dev (Debian, Ubuntu, etc) * rpm: libxml2-devel (Fedora, CentOS, RHEL) * csw: libxml2_dev (Solaris) If libxml-2.0 is already installed, check that 'pkg-config' is in your PATH and PKG_CONFIG_PATH contains a libxml-2.0.pc file. If pkg-config is unavailable you can set INCLUDE_DIR and LIB_DIR manually via: R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...' -------------------------------------------------------------------- ERROR: configuration failed for package ?xml2? Homebrew package info: dekkera:pkgconfig peter$ brew info libxml2 R libxml2: stable 2.9.7 (bottled), HEAD [keg-only] GNOME XML library http://xmlsoft.org /usr/local/Cellar/libxml2/2.9.7 (281 files, 10.4MB) Poured from bottle on 2018-02-16 at 22:42:54 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/libxml2.rb ==> Options --HEAD Install HEAD version ==> Caveats This formula is keg-only, which means it was not symlinked into /usr/local, because macOS already provides this software and installing another version in parallel can cause all kinds of trouble. If you need to have this software first in your PATH run: echo 'export PATH="/usr/local/opt/libxml2/bin:$PATH"' >> ~/.bash_profile For compilers to find this software you may need to set: LDFLAGS: -L/usr/local/opt/libxml2/lib CPPFLAGS: -I/usr/local/opt/libxml2/include For pkg-config to find this software you may need to set: PKG_CONFIG_PATH: /usr/local/opt/libxml2/lib/pkgconfig If you need Python to find bindings for this keg-only formula, run: echo /usr/local/opt/libxml2/lib/python2.7/site-packages >> /usr/local/lib/python2.7/site-packages/libxml2.pth mkdir -p /Users/peter/Library/Python/2.7/lib/python/site-packages echo 'import site; site.addsitedir("/usr/local/lib/python2.7/site-packages")' >> /Users/peter/Library/Python/2.7/lib/python/site-packages/homebrew.pth R: stable 3.4.3 (bottled) Software environment for statistical computing https://www.r-project.org/ /usr/local/Cellar/R/3.4.0_1 (2,246 files, 59.1MB) Poured from bottle on 2017-05-20 at 17:10:29 /usr/local/Cellar/R/3.4.1_2 (2,114 files, 55.3MB) Poured from bottle on 2017-09-19 at 03:23:33 /usr/local/Cellar/R/3.4.2 (2,111 files, 55.1MB) Poured from bottle on 2017-11-13 at 22:23:36 /usr/local/Cellar/R/3.4.3 (2,110 files, 55.1MB) Poured from bottle on 2017-12-02 at 23:20:16 /usr/local/Cellar/R/3.4.3_1 (3,773 files, 115.4MB) Built from source on 2018-02-08 at 22:01:49 with: --with-x11 --with-cairo --with-java From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/r.rb ==> Dependencies Build: pkg-config ? Required: gcc ?, gettext ?, jpeg ?, libpng ?, pcre ?, readline ?, xz ? Optional: openblas ? ==> Requirements Optional: java ? ==> Options --with-java Build with java support --with-openblas Build with openblas support
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