In file included from /private/tmp/pear/install/intl/php_intl.c:25:

I/private/tmp/pear/install/intl -DPHP_ATOM_INC -I/private/tmp/pear/install/pear-build-cwirkusZ8im1T/intl-3.0.0/include -I/private/tmp/pear/install/pear-build-cwirkusZ8im1T/intl-3.0.0/main -I/private/tmp/pear/install/intl -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -I/usr/local/Cellar/icu4c/61.1/include -DHAVE_CONFIG_H -g -O2 -c /private/tmp/pear/install/intl/php_intl.c -fno-common -DPIC -o. I/private/tmp/pear/install/intl -DPHP_ATOM_INC -I/private/tmp/pear/install/pear-build-cwirkusZ8im1T/intl-3.0.0/include -I/private/tmp/pear/install/pear-build-cwirkusZ8im1T/intl-3.0.0/main -I/private/tmp/pear/install/intl -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -I/usr/local/Cellar/icu4c/61.1/include -DHAVE_CONFIG_H -g -O2 -c /private/tmp/pear/install/intl/php_intl.c -o php_intl.loД¬c -I/usr/local/Cellar/icu4c/61.1/include -Wno-write-strings -I. bin/sh /private/tmp/pear/install/pear-build-cwirkusZ8im1T/intl-3.0.0/libtool -mode=compile cc -I/usr/local/Cellar/icu4c/61.1/include -Wno-write-strings -I.

Specify where ICU libraries and headers can be found : /usr/local/opt/icu4c Christian dot wirkus at sport1 dot de homebrew-php is deprecated and the problem persists

Xampp install php intl