diff -ur php-7.3.4/aclocal.m4 php-7.3.4+iPhone/aclocal.m4
--- php-7.3.4/aclocal.m4	2019-04-02 13:48:51.000000000 +0000
+++ php-7.3.4+iPhone/aclocal.m4	2019-05-01 14:53:45.935424715 +0000
@@ -2534,54 +2534,10 @@
 dnl Common setup macro for libxml
 dnl
 AC_DEFUN([PHP_SETUP_LIBXML], [
-  found_libxml=no
-
-  dnl First try to find xml2-config
-  AC_CACHE_CHECK([for xml2-config path], ac_cv_php_xml2_config_path,
-  [
-    for i in $PHP_LIBXML_DIR /usr/local /usr; do
-      if test -x "$i/bin/xml2-config"; then
-        ac_cv_php_xml2_config_path="$i/bin/xml2-config"
-        break
-      fi
-    done
-  ])
-
-  if test -x "$ac_cv_php_xml2_config_path"; then
-    XML2_CONFIG="$ac_cv_php_xml2_config_path"
-    libxml_full_version=`$XML2_CONFIG --version`
-    ac_IFS=$IFS
-    IFS="."
-    set $libxml_full_version
-    IFS=$ac_IFS
-    LIBXML_VERSION=`expr [$]1 \* 1000000 + [$]2 \* 1000 + [$]3`
-    if test "$LIBXML_VERSION" -ge "2006011"; then
-      found_libxml=yes
-      LIBXML_LIBS=`$XML2_CONFIG --libs`
-      LIBXML_INCS=`$XML2_CONFIG --cflags`
-    else
-      AC_MSG_ERROR([libxml2 version 2.6.11 or greater required.])
-    fi
-  fi
-
-  dnl If xml2-config fails, try pkg-config
-  if test "$found_libxml" = "no"; then
-    if test -z "$PKG_CONFIG"; then
-      AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-    fi
-
-    dnl If pkg-config is found try using it
-    if test -x "$PKG_CONFIG" && $PKG_CONFIG --exists libxml-2.0; then
-      if $PKG_CONFIG --atleast-version=2.6.11 libxml-2.0; then
-        found_libxml=yes
-        LIBXML_LIBS=`$PKG_CONFIG --libs libxml-2.0`
-        LIBXML_INCS=`$PKG_CONFIG --cflags-only-I libxml-2.0`
-      else
-        AC_MSG_ERROR([libxml2 version 2.6.11 or greater required.])
-      fi
-    fi
-  fi
+  found_libxml=yes
 
+  LIBXML_LIBS="-lxml2"
+  LIBXML_INCS="-I${PKG_ROOT:-/nonexist}/usr/include/libxml2"
   if test "$found_libxml" = "yes"; then
     PHP_EVAL_LIBLINE($LIBXML_LIBS, $1)
     PHP_EVAL_INCLINE($LIBXML_INCS)
diff -ur php-7.3.4/ext/fileinfo/config.m4 php-7.3.4+iPhone/ext/fileinfo/config.m4
--- php-7.3.4/ext/fileinfo/config.m4	2019-04-02 13:48:51.000000000 +0000
+++ php-7.3.4+iPhone/ext/fileinfo/config.m4	2019-05-01 13:34:15.528408824 +0000
@@ -14,39 +14,9 @@
     libmagic/buffer.c"
 
   AC_MSG_CHECKING([for strcasestr])
-  AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#include <string.h>
-#include <strings.h>
-#include <stdlib.h>
-
-int main(void)
-{
-        char *s0, *s1, *ret;
-
-        s0 = (char *) malloc(42);
-        s1 = (char *) malloc(8);
-
-        memset(s0, 'X', 42);
-        s0[24] = 'Y';
-        s0[26] = 'Z';
-        s0[41] = '\0';
-        memset(s1, 'x', 8);
-        s1[0] = 'y';
-        s1[2] = 'Z';
-        s1[7] = '\0';
-
-        ret = strcasestr(s0, s1);
-
-        return !(NULL != ret);
-}
-  ]])],[
-    dnl using the platform implementation
-    AC_MSG_RESULT(yes)
-  ],[
     AC_MSG_RESULT(no)
     AC_MSG_NOTICE(using libmagic strcasestr implementation)
     libmagic_sources="$libmagic_sources libmagic/strcasestr.c"
-  ],[AC_MSG_RESULT([skipped, cross-compiling])])
 
   PHP_NEW_EXTENSION(fileinfo, fileinfo.c $libmagic_sources, $ext_shared,,-I@ext_srcdir@/libmagic)
   PHP_ADD_BUILD_DIR($ext_builddir/libmagic)
diff -ur php-7.3.4/ext/iconv/config.m4 php-7.3.4+iPhone/ext/iconv/config.m4
--- php-7.3.4/ext/iconv/config.m4	2019-04-02 13:48:54.000000000 +0000
+++ php-7.3.4+iPhone/ext/iconv/config.m4	2019-05-01 13:34:15.528408824 +0000
@@ -13,7 +13,7 @@
 
   if test "$iconv_avail" != "no"; then
     if test -z "$ICONV_DIR"; then
-      for i in /usr/local /usr; do
+      for i in "${PKG_ROOT}/usr"; do
         if test -f "$i/include/iconv.h" || test -f "$i/include/giconv.h"; then
           PHP_ICONV_PREFIX="$i"
           break
diff -ur php-7.3.4/ext/readline/config.m4 php-7.3.4+iPhone/ext/readline/config.m4
--- php-7.3.4/ext/readline/config.m4	2019-04-02 13:48:52.000000000 +0000
+++ php-7.3.4+iPhone/ext/readline/config.m4	2019-05-01 13:40:52.160420030 +0000
@@ -12,7 +12,7 @@
 fi
 
 if test "$PHP_READLINE" && test "$PHP_READLINE" != "no"; then
-  for i in $PHP_READLINE /usr/local /usr; do
+  for i in $PHP_READLINE; do
     test -f $i/include/readline/readline.h && READLINE_DIR=$i && break
   done
 
@@ -76,7 +76,7 @@
 
 elif test "$PHP_LIBEDIT" != "no"; then
 
-  for i in $PHP_LIBEDIT /usr/local /usr; do
+  for i in $PHP_LIBEDIT; do
     test -f $i/include/editline/readline.h && LIBEDIT_DIR=$i && break
   done
 
diff -ur php-7.3.4/ext/xml/config.m4 php-7.3.4+iPhone/ext/xml/config.m4
--- php-7.3.4/ext/xml/config.m4	2019-04-02 13:48:59.000000000 +0000
+++ php-7.3.4+iPhone/ext/xml/config.m4	2019-05-01 13:37:46.820400693 +0000
@@ -34,7 +34,7 @@
   dnl Check for expat only if --with-libexpat-dir is used.
   dnl
   if test "$PHP_LIBEXPAT_DIR" != "no"; then
-    for i in $PHP_XML $PHP_LIBEXPAT_DIR /usr /usr/local; do
+    for i in $PHP_XML $PHP_LIBEXPAT_DIR; do
       if test -f "$i/$PHP_LIBDIR/libexpat.a" || test -f "$i/$PHP_LIBDIR/libexpat.$SHLIB_SUFFIX_NAME"; then
         EXPAT_DIR=$i
         break
diff -ur php-7.3.4/ext/xsl/config.m4 php-7.3.4+iPhone/ext/xsl/config.m4
--- php-7.3.4/ext/xsl/config.m4	2019-04-02 13:48:57.000000000 +0000
+++ php-7.3.4+iPhone/ext/xsl/config.m4	2019-05-01 13:34:15.532408824 +0000
@@ -14,49 +14,16 @@
     AC_MSG_ERROR([XSL extension requires DOM extension, add --enable-dom])
   fi
 
-  for i in $PHP_XSL /usr/local /usr; do
-    if test -x "$i/bin/xslt-config"; then
-      XSLT_CONFIG=$i/bin/xslt-config
-      break
-    fi
-  done
-
-  if test -z "$XSLT_CONFIG"; then
-    AC_MSG_ERROR([xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution])
-  else
-    libxslt_full_version=`$XSLT_CONFIG --version`
-    ac_IFS=$IFS
-    IFS="."
-    set $libxslt_full_version
-    IFS=$ac_IFS
-    LIBXSLT_VERSION=`expr [$]1 \* 1000000 + [$]2 \* 1000 + [$]3`
-    if test "$LIBXSLT_VERSION" -ge "1001000"; then
-      XSL_LIBS=`$XSLT_CONFIG --libs`
-      XSL_INCS=`$XSLT_CONFIG --cflags`
-      PHP_EVAL_LIBLINE($XSL_LIBS, XSL_SHARED_LIBADD)
-      PHP_EVAL_INCLINE($XSL_INCS)
-
-      AC_MSG_CHECKING([for EXSLT support])
-      for i in $PHP_XSL /usr/local /usr; do
-        if test -r "$i/include/libexslt/exslt.h"; then
+        XSL_LIBS=-lxslt
+        XSL_INCS="${PKG_ROOT}"/usr/include/libxslt
+        if test -r "${PKG_ROOT}/usr/include/libexslt/exslt.h" || test -r "$PHP_XSL/usr/include/libexslt/exslt.h"; then
           PHP_XSL_EXSL_DIR=$i
           break
         fi
-      done
-      if test -z "$PHP_XSL_EXSL_DIR"; then
-        AC_MSG_RESULT(not found)
-      else
         AC_MSG_RESULT(found)
         PHP_ADD_LIBRARY_WITH_PATH(exslt, $PHP_XSL_EXSL_DIR/$PHP_LIBDIR, XSL_SHARED_LIBADD)
         PHP_ADD_INCLUDE($PHP_XSL_EXSL_DIR/include)
         AC_DEFINE(HAVE_XSL_EXSLT,1,[ ])
-      fi
-    else
-      AC_MSG_ERROR([libxslt version 1.1.0 or greater required.])
-    fi
-
-
-  fi
 
   AC_DEFINE(HAVE_XSL,1,[ ])
   PHP_NEW_EXTENSION(xsl, php_xsl.c xsltprocessor.c, $ext_shared)
diff -ur php-7.3.4/ext/zlib/config0.m4 php-7.3.4+iPhone/ext/zlib/config0.m4
--- php-7.3.4/ext/zlib/config0.m4	2019-04-02 13:48:52.000000000 +0000
+++ php-7.3.4+iPhone/ext/zlib/config0.m4	2019-05-01 13:39:49.992411350 +0000
@@ -19,7 +19,7 @@
       ZLIB_INCDIR=$ZLIB_DIR/include
     fi
   else
-    for i in /usr/local /usr $PHP_ZLIB_DIR; do
+    for i in $PHP_ZLIB_DIR; do
       if test -f $i/include/zlib/zlib.h; then
         ZLIB_DIR=$i
         ZLIB_INCDIR=$i/include/zlib