Cannot install on Homebrew PHP 7.2

[fgm]

Trying to do

• sudo pecl install memcache
• on macOS 10.14.6 Mojave
• PHP: PHP 7.2.23 (cli) (built: Oct 3 2019 19:49:50) ( NTS )

Expected

Extension installs

Observed

Failure because zlib cannot be located.

downloading memcache-4.0.5.2.tgz ...
Starting to download memcache-4.0.5.2.tgz (75,061 bytes)
.................done: 75,061 bytes
18 source files, building

Warning: preg_match(): Unknown modifier '7' in Builder.php on line 310

Warning: preg_match(): Unknown modifier '7' in /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Builder.php on line 310

Call Stack:
    0.0004     421224   1. {main}() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/peclcmd.php:0
    0.0021     496344   2. require_once('/usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/pearcmd.php') /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/peclcmd.php:31
    0.0370    2086784   3. PEAR_Command_Install->run() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/pearcmd.php:316
    0.0370    2086784   4. PEAR_Command_Install->doInstall() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Command/Common.php:270
    2.8958    5614936   5. PEAR_Installer->install() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Command/Install.php:713
    3.0049    5925200   6. PEAR_Installer->_compileSourceFiles() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Installer.php:1415
    3.0058    6007240   7. PEAR_Builder->build() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Installer.php:1519
    3.0062    6008424   8. preg_match() /usr/local/Cellar/php@7.2/7.2.23/share/php@7.2/pear/PEAR/Builder.php:310

running: phpize
Configuring for:
PHP Api Version:         20170718
Zend Module Api No:      20170718
Zend Extension Api No:   320170718
Enable memcache session handler support? [yes] :
building in /private/tmp/pear/temp/pear-build-rootaIqbJi/memcache-4.0.5.2
running: /private/tmp/pear/temp/memcache/configure --with-php-config=/usr/local/opt/php@7.2/bin/php-config --enable-memcache-session=yes
checking for grep that handles long lines and -e... /usr/bin/grep
// ...snip...
checking for PHP prefix... /usr/local/Cellar/php@7.2/7.2.23
checking for PHP includes... -I/usr/local/Cellar/php@7.2/7.2.23/include/php -I/usr/local/Cellar/php@7.2/7.2.23/include/php/main -I/usr/local/Cellar/php@7.2/7.2.23/include/php/TSRM -I/usr/local/Cellar/php@7.2/7.2.23/include/php/Zend -I/usr/local/Cellar/php@7.2/7.2.23/include/php/ext -I/usr/local/Cellar/php@7.2/7.2.23/include/php/ext/date/lib
checking for PHP extension directory... /usr/local/Cellar/php@7.2/7.2.23/pecl/20170718
checking for PHP installed headers prefix... /usr/local/Cellar/php@7.2/7.2.23/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for re2c... no
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
checking for gawk... no
checking for nawk... no
checking for awk... awk
checking if awk is broken... no
checking whether to enable memcache support... yes, shared
checking whether to enable memcache session handler support... yes
checking for the location of ZLIB... no
checking for the location of zlib... configure: error: memcache support requires ZLIB. Use --with-zlib-dir=<DIR> to specify prefix where ZLIB include and library are located
ERROR: `/private/tmp/pear/temp/memcache/configure --with-php-config=/usr/local/opt/php@7.2/bin/php-config --enable-memcache-session=yes' failed

Although it is actually present in the PHP configuration:

php -i | grep zlib 
Configure Command =>  './configure'  
  '--prefix=/usr/local/Cellar/php@7.2/7.2.23' 
  '--localstatedir=/usr/local/var' 
  '--sysconfdir=/usr/local/etc/php/7.2' 
   '--with-config-file-path=/usr/local/etc/php/7.2' 
   /* ...snip... */ 
   '--with-zlib=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr'

And the header exists:

ls -l /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/zlib*
-rw-r--r--  7 root  wheel  98288  3 nov 18:24 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/zlib.h