--- configure.ac.orig	2018-01-02 22:35:55 UTC
+++ configure.ac
@@ -102,6 +102,7 @@ int zend_sprintf(char *buffer, const char *format, ...
 
 #undef PTHREADS
 
+#include <ext/php_config.h>
 #endif /* PHP_CONFIG_H */
 ])
 
@@ -339,7 +340,6 @@ sinclude(TSRM/tsrm.m4)
 dnl .
 dnl -------------------------------------------------------------------------
 
-PTHREADS_CHECK
 PHP_HELP_SEPARATOR([SAPI modules:])
 PHP_SHLIB_SUFFIX_NAMES
 PHP_BUILD_PROGRAM
@@ -370,15 +370,9 @@ else
   AC_MSG_RESULT([none])
 fi
 
-dnl Exit early
-if test -z "$PHP_INSTALLED_SAPIS"; then
-  AC_MSG_ERROR([Nothing to build.])
-fi
-
 dnl force ZTS
 if test "$enable_maintainer_zts" = "yes"; then
   PTHREADS_ASSIGN_VARS
-  PTHREADS_FLAGS
 fi
 
 dnl Starting system checks.
@@ -682,7 +676,7 @@ nanosleep \
 )
 
 dnl Some systems (like OpenSolaris) do not have nanosleep in libc
-PHP_CHECK_FUNC_LIB(nanosleep, rt)
+PHP_CHECK_FUNC(nanosleep, rt)
 
 dnl Check for getaddrinfo, should be a better way, but...
 dnl Also check for working getaddrinfo
@@ -1235,7 +1229,7 @@ EXPANDED_SYSCONFDIR=`eval echo $sysconfdir`
 EXPANDED_DATADIR=$datadir
 EXPANDED_PHP_CONFIG_FILE_PATH=`eval echo "$PHP_CONFIG_FILE_PATH"`
 EXPANDED_PHP_CONFIG_FILE_SCAN_DIR=`eval echo "$PHP_CONFIG_FILE_SCAN_DIR"`
-INCLUDE_PATH=.:$EXPANDED_PEAR_INSTALLDIR
+INCLUDE_PATH=.:${prefix}/share/pear
 
 exec_prefix=$old_exec_prefix
 libdir=$old_libdir
@@ -1434,7 +1428,7 @@ PHP_SUBST(all_targets)
 PHP_SUBST(install_targets)
 PHP_SUBST(install_binary_targets)
 
-PHP_INSTALL_HEADERS([Zend/ TSRM/ include/ main/ main/streams/])
+PHP_INSTALL_HEADERS([Zend/ TSRM/ main/ main/streams/])
 
 PHP_ADD_SOURCES(TSRM, TSRM.c tsrm_strtok_r.c, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)