php-src/ext/standard/config.m4

dnl
dnl Check if flush should be called explicitly after buffered io
dnl
AC_CACHE_CHECK([whether flush should be called explicitly after a buffered io], ac_cv_flush_io,[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
	char *filename = tmpnam(NULL);
	char buffer[64];
	int result = 0;

	FILE *fp = fopen(filename, "wb");
	if (NULL == fp)
		return 0;
	fputs("line 1\n", fp);
	fputs("line 2\n", fp);
	fclose(fp);

	fp = fopen(filename, "rb+");
	if (NULL == fp)
		return 0;
	fgets(buffer, sizeof(buffer), fp);
	fputs("line 3\n", fp);
	rewind(fp);
	fgets(buffer, sizeof(buffer), fp);
	if (0 != strcmp(buffer, "line 1\n"))
		result = 1;
	fgets(buffer, sizeof(buffer), fp);
	if (0 != strcmp(buffer, "line 3\n"))
		result = 1;
	fclose(fp);
	unlink(filename);

	exit(result);
}
]])],[
  ac_cv_flush_io=no
],[
  ac_cv_flush_io=yes
],[
  ac_cv_flush_io=no
])])
if test "$ac_cv_flush_io" = "yes"; then
  AC_DEFINE(HAVE_FLUSHIO, 1, [Define if flush should be called explicitly after a buffered io.])
fi

dnl
dnl Check for crypt() capabilities
dnl
if test "$ac_cv_func_crypt" = "no"; then
  AC_CHECK_LIB(crypt, crypt, [
    LIBS="-lcrypt $LIBS -lcrypt"
    AC_DEFINE(HAVE_CRYPT, 1, [ ])
  ])
fi

AC_CACHE_CHECK(for standard DES crypt, ac_cv_crypt_des,[
  AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char *encrypted = crypt("rasmuslerdorf","rl");
	exit(!encrypted || strcmp(encrypted,"rl.3StKT.4T8M"));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_des=yes
],[
  ac_cv_crypt_des=no
],[
  ac_cv_crypt_des=yes
])])

AC_CACHE_CHECK(for extended DES crypt, ac_cv_crypt_ext_des,[
  AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char *encrypted = crypt("rasmuslerdorf","_J9..rasm");
	exit(!encrypted || strcmp(encrypted,"_J9..rasmBYk8r9AiWNc"));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_ext_des=yes
],[
  ac_cv_crypt_ext_des=no
],[
  ac_cv_crypt_ext_des=no
])])

AC_CACHE_CHECK(for MD5 crypt, ac_cv_crypt_md5,[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char salt[15], answer[40];
	char *encrypted;

	salt[0]='$'; salt[1]='1'; salt[2]='$';
	salt[3]='r'; salt[4]='a'; salt[5]='s';
	salt[6]='m'; salt[7]='u'; salt[8]='s';
	salt[9]='l'; salt[10]='e'; salt[11]='$';
	salt[12]='\0';
	strcpy(answer,salt);
	strcat(answer,"rISCgZzpwk3UhDidwXvin0");
	encrypted = crypt("rasmuslerdorf",salt);
	exit(!encrypted || strcmp(encrypted,answer));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_md5=yes
],[
  ac_cv_crypt_md5=no
],[
  ac_cv_crypt_md5=no
])])

AC_CACHE_CHECK(for Blowfish crypt, ac_cv_crypt_blowfish,[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char salt[30], answer[70];
	char *encrypted;

	salt[0]='$'; salt[1]='2'; salt[2]='a'; salt[3]='$'; salt[4]='0'; salt[5]='7'; salt[6]='$'; salt[7]='\0';
	strcat(salt,"rasmuslerd............");
	strcpy(answer,salt);
	strcpy(&answer[29],"nIdrcHdxcUxWomQX9j6kvERCFjTg7Ra");
	encrypted = crypt("rasmuslerdorf",salt);
	exit(!encrypted || strcmp(encrypted,answer));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_blowfish=yes
],[
  ac_cv_crypt_blowfish=no
],[
  ac_cv_crypt_blowfish=no
])])

AC_CACHE_CHECK(for SHA512 crypt, ac_cv_crypt_sha512,[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char salt[21], answer[21+86];
	char *encrypted;

	strcpy(salt,"\$6\$rasmuslerdorf\$");
	strcpy(answer, salt);
	strcat(answer, "EeHCRjm0bljalWuALHSTs1NB9ipEiLEXLhYeXdOpx22gmlmVejnVXFhd84cEKbYxCo.XuUTrW.RLraeEnsvWs/");
	encrypted = crypt("rasmuslerdorf",salt);
	exit(!encrypted || strcmp(encrypted,answer));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_sha512=yes
],[
  ac_cv_crypt_sha512=no
],[
  ac_cv_crypt_sha512=no
])])

AC_CACHE_CHECK(for SHA256 crypt, ac_cv_crypt_sha256,[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if HAVE_CRYPT_H
#include <crypt.h>
#endif

int main() {
#if HAVE_CRYPT
	char salt[21], answer[21+43];
	char *encrypted;

	strcpy(salt,"\$5\$rasmuslerdorf\$");
	strcpy(answer, salt);
	strcat(answer, "cFAm2puLCujQ9t.0CxiFIIvFi4JyQx5UncCt/xRIX23");
	encrypted = crypt("rasmuslerdorf",salt);
	exit(!encrypted || strcmp(encrypted,answer));
#else
	exit(1);
#endif
}]])],[
  ac_cv_crypt_sha256=yes
],[
  ac_cv_crypt_sha256=no
],[
  ac_cv_crypt_sha256=no
])])


dnl
dnl If one of them is missing, use our own implementation, portable code is then possible
dnl
if test "$ac_cv_crypt_blowfish" = "no" || test "$ac_cv_crypt_des" = "no" || test "$ac_cv_crypt_ext_des" = "no" || test "$ac_cv_crypt_md5" = "no" || test "$ac_cv_crypt_sha512" = "no" || test "$ac_cv_crypt_sha256" = "no" || test "x$php_crypt_r" = "x0"; then

  dnl
  dnl Check for __alignof__ support in the compiler
  dnl
  AC_CACHE_CHECK(whether the compiler supports __alignof__, ac_cv_alignof_exists,[
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  ]],[[
    int align = __alignof__(int);
  ]])],[
    ac_cv_alignof_exists=yes
  ],[
    ac_cv_alignof_exists=no
  ])])
  if test "$ac_cv_alignof_exists" = "yes"; then
    AC_DEFINE([HAVE_ALIGNOF], 1, [whether the compiler supports __alignof__])
  fi

  AC_DEFINE_UNQUOTED(PHP_USE_PHP_CRYPT_R, 1, [Whether PHP has to use its own crypt_r for blowfish, des, ext des and md5])

  PHP_ADD_SOURCES(PHP_EXT_DIR(standard), crypt_freesec.c crypt_blowfish.c crypt_sha512.c crypt_sha256.c php_crypt_r.c)
else
  AC_DEFINE_UNQUOTED(PHP_USE_PHP_CRYPT_R, 0, [Whether PHP has to use its own crypt_r for blowfish, des and ext des])
fi

dnl
dnl Check for __attribute__ ((__aligned__)) support in the compiler
dnl
AC_CACHE_CHECK(whether the compiler supports aligned attribute, ac_cv_attribute_aligned,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
]],[[
  unsigned char test[32] __attribute__ ((__aligned__ (__alignof__ (int))));
]])],[
  ac_cv_attribute_aligned=yes
],[
  ac_cv_attribute_aligned=no
])])
if test "$ac_cv_attribute_aligned" = "yes"; then
  AC_DEFINE([HAVE_ATTRIBUTE_ALIGNED], 1, [whether the compiler supports __attribute__ ((__aligned__))])
fi

dnl
dnl Check for available functions
dnl
dnl log2 could be used to improve the log function, however it requires C99. The
dnl check for log2 should be turned on, as soon as we support C99.
AC_CHECK_FUNCS(asinh acosh atanh log1p hypot)
AC_FUNC_FNMATCH

dnl
dnl Check if there is a support means of creating a new process and defining
dnl which handles it receives
dnl
AC_CHECK_FUNCS(fork CreateProcess, [
  php_can_support_proc_open=yes
  break
],[
  php_can_support_proc_open=no
])
AC_MSG_CHECKING([if your OS can spawn processes with inherited handles])
if test "$php_can_support_proc_open" = "yes"; then
  AC_MSG_RESULT(yes)
  AC_DEFINE(PHP_CAN_SUPPORT_PROC_OPEN,1, [Define if your system has fork/vfork/CreateProcess])
else
  AC_MSG_RESULT(no)
fi

PHP_ENABLE_CHROOT_FUNC=no
case "$PHP_SAPI" in
  embed)
    PHP_ENABLE_CHROOT_FUNC=yes
  ;;

  none)
    for PROG in $PHP_BINARIES; do
      case "$PROG" in
        cgi|cli|phpdbg)
          PHP_ENABLE_CHROOT_FUNC=yes
        ;;

        *)
          PHP_ENABLE_CHROOT_FUNC=no
          break
        ;;
      esac
   done
  ;;
esac

if test "$PHP_ENABLE_CHROOT_FUNC" = "yes"; then
  AC_DEFINE(ENABLE_CHROOT_FUNC, 1, [Whether to enable chroot() function])
fi

dnl
dnl Detect library functions needed by php dns_xxx functions
dnl ext/standard/php_dns.h will collect these in a single define
dnl HAVE_FULL_DNS_FUNCS
dnl
PHP_CHECK_FUNC(res_nsearch, resolv, bind, socket)
PHP_CHECK_FUNC(res_ndestroy, resolv, bind, socket)
PHP_CHECK_FUNC(dns_search, resolv, bind, socket)
PHP_CHECK_FUNC(dn_expand, resolv, bind, socket)
PHP_CHECK_FUNC(dn_skipname, resolv, bind, socket)

dnl
dnl These are old deprecated functions
dnl

PHP_CHECK_FUNC(res_search, resolv, bind, socket)

dnl
dnl Check for strptime()
dnl
AC_CACHE_CHECK(whether strptime() declaration fails, ac_cv_strptime_decl_fails,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <time.h>
]],[[
#ifndef HAVE_STRPTIME
#error no strptime() on this platform
#else
/* use invalid strptime() declaration to see if it fails to compile */
int strptime(const char *s, const char *format, struct tm *tm);
#endif
]])],[
  ac_cv_strptime_decl_fails=no
],[
  ac_cv_strptime_decl_fails=yes
])])
if test "$ac_cv_strptime_decl_fails" = "yes"; then
  AC_DEFINE([HAVE_STRPTIME_DECL_FAILS], 1, [whether strptime() declaration fails])
fi

dnl
dnl Check for i18n capabilities
dnl
AC_CHECK_HEADERS([wchar.h])
AC_CHECK_FUNCS([mblen])
AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
]],[[
mbstate_t a;
]])],[
  ac_cv_type_mbstate_t=yes
],[
  ac_cv_type_mbstate_t=no
])])
if test "$ac_cv_type_mbstate_t" = "yes"; then
  AC_DEFINE([HAVE_MBSTATE_T], 1, [Define if your system has mbstate_t in wchar.h])
fi

dnl
dnl Check for atomic operation API availability in Solaris
dnl
AC_CHECK_HEADERS([atomic.h])

dnl
dnl Check for arc4random on BSD systems
dnl
AC_CHECK_DECLS([arc4random_buf])

dnl
dnl Check for argon2
dnl
PHP_ARG_WITH([password-argon2],
  [for Argon2 support],
  [AS_HELP_STRING([[--with-password-argon2[=DIR]]],
    [Include Argon2 support in password_*. DIR is the Argon2 shared library
    path])])

if test "$PHP_PASSWORD_ARGON2" != "no"; then
  AC_MSG_CHECKING([for Argon2 library])
  for i in $PHP_PASSWORD_ARGON2 /usr /usr/local ; do
    if test -r $i/include/argon2.h; then
      ARGON2_DIR=$i;
      AC_MSG_RESULT(found in $i)
      break
    fi
  done

  if test -z "$ARGON2_DIR"; then
    AC_MSG_RESULT([not found])
    AC_MSG_ERROR([Please ensure the argon2 header and library are installed])
  fi

  PHP_ADD_LIBRARY_WITH_PATH(argon2, $ARGON2_DIR/$PHP_LIBDIR)
  PHP_ADD_INCLUDE($ARGON2_DIR/include)

  AC_CHECK_LIB(argon2, argon2id_hash_raw, [
    LIBS="$LIBS -largon2"
    AC_DEFINE(HAVE_ARGON2LIB, 1, [ Define to 1 if you have the <argon2.h> header file ])
  ], [
    AC_MSG_ERROR([Problem with libargon2.(a|so). Please verify that Argon2 header and libraries >= 20161029 are installed])
  ])
fi

dnl
dnl net_get_interfaces
dnl
AC_CHECK_HEADERS([net/if.h],[], [],
[
  #ifdef HAVE_SYS_SOCKET_H
  #include <sys/socket.h>
  #endif
  #include <net/if.h>
])
AC_MSG_CHECKING([for usable getifaddrs])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
  #include <sys/types.h>
  #include <ifaddrs.h>
]],[[
  struct ifaddrs *interfaces;
  if (!getifaddrs(&interfaces)) {
      freeifaddrs(interfaces);
  }
]])], [ac_have_getifaddrs=yes], [ac_have_getifaddrs=no])
if test "$ac_have_getifaddrs" = "yes" ; then
  AC_DEFINE(HAVE_GETIFADDRS, 1, [whether getifaddrs is present and usable])
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

dnl
dnl Setup extension sources
dnl
PHP_NEW_EXTENSION(standard, array.c base64.c basic_functions.c browscap.c crc32.c crypt.c \
                            cyr_convert.c datetime.c dir.c dl.c dns.c exec.c file.c filestat.c \
                            flock_compat.c formatted_print.c fsock.c head.c html.c image.c \
                            info.c iptc.c lcg.c link.c mail.c math.c md5.c metaphone.c \
                            microtime.c pack.c pageinfo.c quot_print.c rand.c mt_rand.c \
                            soundex.c string.c scanf.c syslog.c type.c uniqid.c url.c \
                            var.c versioning.c assert.c strnatcmp.c levenshtein.c \
                            incomplete_class.c url_scanner_ex.c ftp_fopen_wrapper.c \
                            http_fopen_wrapper.c php_fopen_wrapper.c credits.c css.c \
                            var_unserializer.c ftok.c sha1.c user_filters.c uuencode.c \
                            filters.c proc_open.c streamsfuncs.c http.c password.c \
                            random.c net.c hrtime.c,,,
			    -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

PHP_ADD_MAKEFILE_FRAGMENT
PHP_INSTALL_HEADERS([ext/standard/])