PHP-8.4.txt

'configure' configures PHP 8.4.0-dev to adapt to many kinds of systems.

Usage: ./configure [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit
      --help=short        display options specific to this package
      --help=recursive    display the short help of all the included packages
  -V, --version           display version information and exit
  -q, --quiet, --silent   do not print 'checking ...' messages
      --cache-file=FILE   cache test results in FILE [disabled]
  -C, --config-cache      alias for '--cache-file=config.cache'
  -n, --no-create         do not create output files
      --srcdir=DIR        find the sources in DIR [configure dir or '..']

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]
  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                          [PREFIX]

By default, 'make install' will install all the files in
'/usr/local/bin', '/usr/local/lib' etc.  You can specify
an installation prefix other than '/usr/local' using '--prefix',
for instance '--prefix=$HOME'.

For better control, use the options below.

Fine tuning of the installation directories:
  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --oldincludedir=DIR     C header files for non-gcc [/usr/include]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
  --infodir=DIR           info documentation [DATAROOTDIR/info]
  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
  --mandir=DIR            man documentation [DATAROOTDIR/man]
  --docdir=DIR            documentation root [DATAROOTDIR/doc/php]
  --htmldir=DIR           html documentation [DOCDIR]
  --dvidir=DIR            dvi documentation [DOCDIR]
  --pdfdir=DIR            pdf documentation [DOCDIR]
  --psdir=DIR             ps documentation [DOCDIR]

Program names:
  --program-prefix=PREFIX            prepend PREFIX to installed program names
  --program-suffix=SUFFIX            append SUFFIX to installed program names
  --program-transform-name=PROGRAM   run sed PROGRAM on installed program names

System types:
  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
  --target=TARGET   configure for building compilers for TARGET [HOST]

Optional Features and Packages:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
  --with-libdir=NAME      Look for libraries in .../NAME rather than .../lib
  --disable-rpath         Disable passing additional runtime library search
                          paths
  --enable-re2c-cgoto     Enable re2c -g flag to optimize conditional jumps
                          using computed goto extension, if supported by the
                          compiler

SAPI modules:
  --with-apxs2[=FILE]     Build shared Apache 2 handler module. FILE is the
                          optional pathname to the Apache apxs tool [apxs]
  --disable-cli           Disable building CLI version of PHP (this forces
                          --without-pear)
  --enable-embed[=TYPE]   Enable building of embedded SAPI library TYPE is
                          either 'shared' or 'static'. [TYPE=shared]
  --enable-fpm            Enable building of the fpm SAPI executable
  --with-fpm-user[=USER]  Set the user for php-fpm to run as. (default:
                          nobody)
  --with-fpm-group[=GRP]  Set the group for php-fpm to run as. For a system
                          user, this should usually be set to match the fpm
                          username (default: nobody)
  --with-fpm-systemd      Activate systemd integration
  --with-fpm-acl          Use POSIX Access Control Lists
  --with-fpm-apparmor     Support AppArmor confinement through libapparmor
  --with-fpm-selinux      Support SELinux policy library
  --enable-fuzzer         Build PHP as Clang fuzzing test module (for
                          developers)
  --enable-litespeed      Build PHP as litespeed module
  --disable-phpdbg        Disable building of phpdbg
  --enable-phpdbg-debug   Build phpdbg in debug mode to enable additional
                          diagnostic output for developing and troubleshooting
                          phpdbg itself
  --enable-phpdbg-readline
                          Enable readline support in phpdbg (depends on static
                          ext/readline)
  --disable-cgi           Disable building CGI version of PHP
  --with-valgrind         Enable Valgrind support

General settings:
  --enable-gcov           Enable GCOV code coverage - FOR DEVELOPERS ONLY!!
  --enable-debug          Compile with debugging symbols
  --enable-debug-assertions
                          Compile with debug assertions even in release mode
  --enable-zts            Enable thread safety
  --enable-rtld-now       Use dlopen with RTLD_NOW instead of RTLD_LAZY
  --with-layout=TYPE      Set how installed files will be laid out. Type can
                          be either PHP or GNU [PHP]
  --with-config-file-path=PATH
                          Set the path in which to look for php.ini
                          [PREFIX/lib]
  --with-config-file-scan-dir=PATH
                          Set the path where to scan for configuration files
  --enable-sigchild       Enable PHP's own SIGCHLD handler
  --enable-libgcc         Enable explicitly linking against libgcc
  --disable-short-tags    Disable the short-form <? start tag by default
  --enable-dmalloc        Enable dmalloc
  --disable-ipv6          Disable IPv6 support
  --enable-dtrace         Enable DTrace support
  --enable-fd-setsize     Set size of descriptor sets
  --enable-werror         Enable -Werror
  --enable-memory-sanitizer
                          Enable memory sanitizer (clang only)
  --enable-address-sanitizer
                          Enable address sanitizer
  --enable-undefined-sanitizer
                          Enable undefined sanitizer

Extensions:
  --with-EXTENSION=[shared[,PATH]]

    NOTE: Not all extensions can be built as 'shared'.

    Example: --with-foobar=shared,/usr/local/foobar/

      o Builds the foobar extension as shared extension.
      o foobar package install prefix is /usr/local/foobar/

  --disable-all           Disable all extensions which are enabled by default
  --without-libxml        Build without LIBXML support
  --with-openssl          Include OpenSSL support (requires OpenSSL >= 1.1.1)
  --with-system-ciphers   OPENSSL: Use system default cipher list instead of
                          hardcoded value
  --with-openssl-legacy-provider
                          OPENSSL: Load legacy algorithm provider in addition
                          to default provider
  --with-openssl-argon2   OPENSSL: Enable argon2 password hashing
  --with-external-pcre    Use external library for PCRE support
  --without-pcre-jit      Disable PCRE JIT functionality
  --without-sqlite3       Do not include SQLite3 support.
  --with-zlib             Include ZLIB support (requires zlib library)
  --enable-bcmath         Enable bc style precision math functions
  --with-bz2[=DIR]        Include BZip2 support
  --enable-calendar       Enable support for calendar conversion
  --disable-ctype         Disable ctype functions
  --with-curl             Include cURL support
  --enable-dba            Build DBA with bundled modules. To build shared DBA
                          extension use --enable-dba=shared
  --with-qdbm[=DIR]       DBA: QDBM support
  --with-gdbm[=DIR]       DBA: GDBM support
  --with-ndbm[=DIR]       DBA: NDBM support
  --with-db4[=DIR]        DBA: Oracle Berkeley DB 4.x or 5.x support
  --with-db3[=DIR]        DBA: Oracle Berkeley DB 3.x support
  --with-db2[=DIR]        DBA: Oracle Berkeley DB 2.x support
  --with-db1[=DIR]        DBA: Oracle Berkeley DB 1.x support/emulation
  --with-dbm[=DIR]        DBA: DBM support
  --with-tcadb[=DIR]      DBA: Tokyo Cabinet abstract DB support
  --with-lmdb[=DIR]       DBA: Lightning memory-mapped database support
  --without-cdb[=DIR]     DBA: CDB support (bundled)
  --disable-inifile       DBA: INI support (bundled)
  --disable-flatfile      DBA: FlatFile support (bundled)
  --enable-dl-test        Enable dl_test extension
  --disable-dom           Disable DOM support
  --with-enchant          Include Enchant support
  --enable-exif           Enable EXIF (metadata from images) support
  --with-ffi              Include FFI support
  --disable-fileinfo      Disable fileinfo support
  --disable-filter        Disable input filter support
  --enable-ftp            Enable FTP support
  --with-ftp-ssl          Explicitly enable FTP over SSL support when building
                          without openssl extension or when using phpize. If
                          the openssl extension is enabled at the configure
                          step (--with-openssl), FTP-SSL is enabled implicitly
                          regardless of this option.
  --enable-gd             Include GD support
  --with-external-gd      Use external libgd
  --with-avif             GD: Enable AVIF support (only for bundled libgd)
  --with-webp             GD: Enable WEBP support (only for bundled libgd)
  --with-jpeg             GD: Enable JPEG support (only for bundled libgd)
  --with-xpm              GD: Enable XPM support (only for bundled libgd)
  --with-freetype         GD: Enable FreeType 2 support (only for bundled
                          libgd)
  --enable-gd-jis-conv    GD: Enable JIS-mapped Japanese font support (only
                          for bundled libgd)
  --with-gettext[=DIR]    Include GNU gettext support
  --with-gmp[=DIR]        Include GNU MP support. Use PKG_CONFIG_PATH (or
                          GMP_CFLAGS and GMP_LIBS) environment variables, or
                          alternatively the optional DIR argument to customize
                          where to look for the GNU MP library.
  --with-mhash            Include mhash support
  --without-iconv[=DIR]   Exclude iconv support
  --enable-intl           Enable internationalization support
  --with-ldap[=DIR]       Include LDAP support
  --with-ldap-sasl        LDAP: Build with Cyrus SASL support
  --enable-mbstring       Enable multibyte string support
  --disable-mbregex       MBSTRING: Disable multibyte regex support
  --with-mysqli           Include MySQLi support. The MySQL native driver will
                          be used
  --with-mysql-sock[=SOCKPATH]
                          MySQLi/PDO_MYSQL: Location of the MySQL Unix socket
                          pointer. If unspecified, the default locations are
                          searched
  --with-odbcver[=HEX]    Force support for the passed ODBC version. A hex
                          number is expected, default 0x0350. Use the special
                          value of 0 to prevent an explicit ODBCVER to be
                          defined.
  --with-adabas[=DIR]     Include Adabas D support [/usr/local]
  --with-sapdb[=DIR]      Include SAP DB support [/usr/local]
  --with-solid[=DIR]      Include Solid support [/usr/local/solid]
  --with-ibm-db2[=DIR]    Include IBM DB2 support [/home/db2inst1/sqllib]
  --with-empress[=DIR]    Include Empress support $EMPRESSPATH (Empress
                          Version >= 8.60 required)
  --with-empress-bcs[=DIR]
                          Include Empress Local Access support $EMPRESSPATH
                          (Empress Version >= 8.60 required)
  --with-custom-odbc[=DIR]
                          Include user defined ODBC support. DIR is ODBC
                          install base directory [/usr/local]. Make sure to
                          define CUSTOM_ODBC_LIBS and have some odbc.h in your
                          include dirs. For example, you should define
                          following for Sybase SQL Anywhere 5.5.00 on QNX,
                          prior to running this configure script:
                          CPPFLAGS="-DODBC_QNX -DSQLANY_BUG" LDFLAGS=-lunix
                          CUSTOM_ODBC_LIBS="-ldblib -lodbc"
  --with-iodbc            Include iODBC support
  --with-esoob[=DIR]      Include Easysoft OOB support
                          [/usr/local/easysoft/oob/client]
  --with-unixODBC[=DIR]   Include unixODBC support. Use PKG_CONFIG_PATH (or
                          ODBC_CFLAGS and ODBC_LIBS) environment variables, or
                          alternatively the optional DIR argument to customize
                          where to look for the unixODBC library.
  --with-dbmaker[=DIR]    Include DBMaker support
  --disable-opcache       Disable Zend OPcache support
  --disable-huge-code-pages
                          Disable copying PHP CODE pages into HUGE PAGES
  --disable-opcache-jit   Disable JIT
  --with-capstone         Support opcache JIT disassembly through Capstone
  --enable-pcntl          Enable pcntl support (CLI/CGI only)
  --disable-pdo           Disable PHP Data Objects support
  --with-pdo-dblib[=DIR]  PDO: DBLIB-DB support. DIR is the FreeTDS home
                          directory
  --with-pdo-firebird[=DIR]
                          PDO: Firebird support. DIR is the Firebird base
                          install directory [/opt/firebird]
  --with-pdo-mysql[=DIR]  PDO: MySQL support. DIR is the MySQL base directory.
                          If no value or mysqlnd is passed as DIR, the MySQL
                          native driver will be used
  --with-pdo-odbc=flavour,dir
                          PDO: Support for 'flavour' ODBC driver. The
                          'flavour' part determines what driver or driver
                          manager to use; it can be either ibm-db2, iODBC,
                          unixODBC, or generic. The include and lib dirs are
                          looked for under 'dir'. You may attempt to use an
                          otherwise unsupported driver using the 'generic'
                          flavour. The syntax for generic ODBC support is:
                          --with-pdo-odbc=generic,dir,libname,ldflags,cflags.
                          When built as 'shared' the extension filename is
                          always 'pdo_odbc.so'. For unixODBC and iODBC, the
                          'dir' part is ignored and can be omitted, as
                          pkg-config will be searched instead. For ibm-db2, it
                          will search for the DB2 driver at that path.
  --with-pdo-pgsql[=DIR]  PDO: PostgreSQL support. Optional DIR is the
                          PostgreSQL base install directory or the path to
                          pg_config. Also, the PGSQL_CFLAGS and PGSQL_LIBS
                          environment variables can be used instead of the DIR
                          argument to customize the libpq paths.
  --without-pdo-sqlite    PDO: sqlite 3 support.
  --with-pgsql[=DIR]      Include PostgreSQL support. Optional DIR is the
                          PostgreSQL base install directory or the path to
                          pg_config. Also, the PGSQL_CFLAGS and PGSQL_LIBS
                          environment variables can be used instead of the DIR
                          argument to customize the libpq paths.
  --disable-phar          Disable phar support
  --disable-posix         Disable POSIX-like functions
  --with-libedit          Include libedit readline replacement (CLI/CGI only)
  --with-readline[=DIR]   Include readline support (CLI/CGI only)
  --disable-session       Disable session support
  --with-mm[=DIR]         SESSION: Include mm support for session storage
  --enable-shmop          Enable shmop support
  --disable-simplexml     Disable SimpleXML support
  --with-snmp[=DIR]       Include SNMP support. Use PKG_CONFIG_PATH (or
                          SNMP_CFLAGS and SNMP_LIBS) environment variables, or
                          alternatively the optional DIR argument to customize
                          where to look for the net-snmp-config utility of the
                          NET-SNMP library.
  --enable-soap           Enable SOAP support
  --enable-sockets        Enable sockets support
  --with-sodium           Include sodium support
  --with-external-libcrypt
                          Use external libcrypt or libxcrypt
  --with-password-argon2  Include Argon2 support in password_*
  --enable-sysvmsg        Enable sysvmsg support
  --enable-sysvsem        Enable System V semaphore support
  --enable-sysvshm        Enable the System V shared memory support
  --with-tidy[=DIR]       Include TIDY support
  --disable-tokenizer     Disable tokenizer support
  --disable-xml           Disable XML support
  --with-expat            XML: use Expat library instead of libxml2 in the xml
                          extension
  --disable-xmlreader     Disable XMLReader support
  --disable-xmlwriter     Disable XMLWriter support
  --with-xsl              Build with XSL support
  --enable-zend-test      Enable zend_test extension
  --with-zip              Include Zip read/write support
  --enable-mysqlnd        Enable mysqlnd explicitly, will be done implicitly
                          when required by other extensions
  --with-mysqlnd-ssl      Explicitly enable extended SSL support in the
                          mysqlnd extension when building without openssl
                          extension or when using phpize. If the openssl
                          extension is enabled at the configure step
                          (--with-openssl), extended SSL is enabled implicitly
                          regardless of this option.
  --disable-mysqlnd-compression-support
                          Disable support for the MySQL compressed protocol in
                          mysqlnd

PEAR:
  --with-pear[=DIR]       Install PEAR in DIR [PREFIX/lib/php]

Zend:
  --disable-fiber-asm     Disable the use of boost fiber assembly files
  --disable-gcc-global-regs
                          Disable GCC global register variables
  --disable-zend-signals  Disable Zend signal handling
  --enable-zend-max-execution-timers
                          Enable Zend max execution timers; when building with
                          thread safety (--enable-zts), they are automatically
                          enabled by default based on the system support

Libtool:
  --enable-shared=PKGS    Build shared libraries default=yes
  --enable-static=PKGS    Build static libraries default=yes
  --enable-fast-install=PKGS
                          Optimize for fast installation default=yes
  --with-gnu-ld           Assume the C compiler uses GNU ld default=no
  --disable-libtool-lock  Avoid locking (might break parallel builds)
  --with-pic              Try to use only PIC/non-PIC objects default=use both
  --with-tags=TAGS        Include additional configurations automatic

Some influential environment variables:
  PHP_EXTRA_VERSION
              Extra PHP version label suffix, e.g. '-dev', 'rc1', '-acme'
  PKG_CONFIG  path to pkg-config utility
  PKG_CONFIG_PATH
              directories to add to pkg-config's search path
  PKG_CONFIG_LIBDIR
              path overriding pkg-config's built-in search path
  CC          C compiler command
  CFLAGS      C compiler flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
  LIBS        libraries to pass to the linker, e.g. -l<library>
  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
              you have headers in a nonstandard directory <include dir>
  CPP         C preprocessor
  SYSTEMD_CFLAGS
              C compiler flags for SYSTEMD, overriding pkg-config
  SYSTEMD_LIBS
              linker flags for SYSTEMD, overriding pkg-config
  APPARMOR_CFLAGS
              C compiler flags for APPARMOR, overriding pkg-config
  APPARMOR_LIBS
              linker flags for APPARMOR, overriding pkg-config
  SELINUX_CFLAGS
              C compiler flags for SELINUX, overriding pkg-config
  SELINUX_LIBS
              linker flags for SELINUX, overriding pkg-config
  CXX         C++ compiler command
  CXXFLAGS    C++ compiler flags
  CXXCPP      C++ preprocessor
  VALGRIND_CFLAGS
              C compiler flags for VALGRIND, overriding pkg-config
  VALGRIND_LIBS
              linker flags for VALGRIND, overriding pkg-config
  LIBXML_CFLAGS
              C compiler flags for LIBXML, overriding pkg-config
  LIBXML_LIBS linker flags for LIBXML, overriding pkg-config
  OPENSSL_CFLAGS
              C compiler flags for OPENSSL, overriding pkg-config
  OPENSSL_LIBS
              linker flags for OPENSSL, overriding pkg-config
  PCRE2_CFLAGS
              C compiler flags for PCRE2, overriding pkg-config
  PCRE2_LIBS  linker flags for PCRE2, overriding pkg-config
  SQLITE_CFLAGS
              C compiler flags for SQLITE, overriding pkg-config
  SQLITE_LIBS linker flags for SQLITE, overriding pkg-config
  ZLIB_CFLAGS C compiler flags for ZLIB, overriding pkg-config
  ZLIB_LIBS   linker flags for ZLIB, overriding pkg-config
  CURL_CFLAGS C compiler flags for CURL, overriding pkg-config
  CURL_LIBS   linker flags for CURL, overriding pkg-config
  CURL_FEATURES
              value of supported_features for libcurl, overriding pkg-config
  ENCHANT2_CFLAGS
              C compiler flags for ENCHANT2, overriding pkg-config
  ENCHANT2_LIBS
              linker flags for ENCHANT2, overriding pkg-config
  ENCHANT_CFLAGS
              C compiler flags for ENCHANT, overriding pkg-config
  ENCHANT_LIBS
              linker flags for ENCHANT, overriding pkg-config
  FFI_CFLAGS  C compiler flags for FFI, overriding pkg-config
  FFI_LIBS    linker flags for FFI, overriding pkg-config
  PNG_CFLAGS  C compiler flags for PNG, overriding pkg-config
  PNG_LIBS    linker flags for PNG, overriding pkg-config
  AVIF_CFLAGS C compiler flags for AVIF, overriding pkg-config
  AVIF_LIBS   linker flags for AVIF, overriding pkg-config
  WEBP_CFLAGS C compiler flags for WEBP, overriding pkg-config
  WEBP_LIBS   linker flags for WEBP, overriding pkg-config
  JPEG_CFLAGS C compiler flags for JPEG, overriding pkg-config
  JPEG_LIBS   linker flags for JPEG, overriding pkg-config
  XPM_CFLAGS  C compiler flags for XPM, overriding pkg-config
  XPM_LIBS    linker flags for XPM, overriding pkg-config
  FREETYPE2_CFLAGS
              C compiler flags for FREETYPE2, overriding pkg-config
  FREETYPE2_LIBS
              linker flags for FREETYPE2, overriding pkg-config
  GDLIB_CFLAGS
              C compiler flags for GDLIB, overriding pkg-config
  GDLIB_LIBS  linker flags for GDLIB, overriding pkg-config
  GMP_CFLAGS  C compiler flags for GMP, overriding pkg-config
  GMP_LIBS    linker flags for GMP, overriding pkg-config
  ICU_CFLAGS  C compiler flags for ICU, overriding pkg-config
  ICU_LIBS    linker flags for ICU, overriding pkg-config
  SASL_CFLAGS C compiler flags for SASL, overriding pkg-config
  SASL_LIBS   linker flags for SASL, overriding pkg-config
  ONIG_CFLAGS C compiler flags for ONIG, overriding pkg-config
  ONIG_LIBS   linker flags for ONIG, overriding pkg-config
  ODBC_CFLAGS C compiler flags for ODBC, overriding pkg-config
  ODBC_LIBS   linker flags for ODBC, overriding pkg-config
  CAPSTONE_CFLAGS
              C compiler flags for CAPSTONE, overriding pkg-config
  CAPSTONE_LIBS
              linker flags for CAPSTONE, overriding pkg-config
  PDO_ODBC_CFLAGS
              C compiler flags for PDO_ODBC, overriding pkg-config
  PDO_ODBC_LIBS
              linker flags for PDO_ODBC, overriding pkg-config
  PGSQL_CFLAGS
              C compiler flags for PGSQL, overriding pkg-config
  PGSQL_LIBS  linker flags for PGSQL, overriding pkg-config
  EDIT_CFLAGS C compiler flags for EDIT, overriding pkg-config
  EDIT_LIBS   linker flags for EDIT, overriding pkg-config
  SNMP_CFLAGS C compiler flags for SNMP, overriding pkg-config
  SNMP_LIBS   linker flags for SNMP, overriding pkg-config
  LIBSODIUM_CFLAGS
              C compiler flags for LIBSODIUM, overriding pkg-config
  LIBSODIUM_LIBS
              linker flags for LIBSODIUM, overriding pkg-config
  ARGON2_CFLAGS
              C compiler flags for ARGON2, overriding pkg-config
  ARGON2_LIBS linker flags for ARGON2, overriding pkg-config
  EXPAT_CFLAGS
              C compiler flags for EXPAT, overriding pkg-config
  EXPAT_LIBS  linker flags for EXPAT, overriding pkg-config
  XSL_CFLAGS  C compiler flags for XSL, overriding pkg-config
  XSL_LIBS    linker flags for XSL, overriding pkg-config
  EXSLT_CFLAGS
              C compiler flags for EXSLT, overriding pkg-config
  EXSLT_LIBS  linker flags for EXSLT, overriding pkg-config
  LIBZIP_CFLAGS
              C compiler flags for LIBZIP, overriding pkg-config
  LIBZIP_LIBS linker flags for LIBZIP, overriding pkg-config
  EXTENSION_DIR
              Default directory for dynamically loadable PHP extensions. If
              left empty, it is determined automatically. Can be overridden
              using the PHP 'extension_dir' INI directive.
  PHP_UNAME   System information (defaults to the 'uname -a' output)
  PHP_BUILD_SYSTEM
              The system that PHP was built on (defaults to the 'uname -a'
              output)
  PHP_BUILD_PROVIDER
              The PHP build provider information
  PHP_BUILD_COMPILER
              Information about the compiler used for the PHP build
  PHP_BUILD_ARCH
              The build architecture

Use these variables to override the choices made by 'configure' or to help
it to find libraries and programs with nonstandard names/locations.

Report bugs to <https://github.com/php/php-src/issues>.
PHP home page: <https://www.php.net>.