After some tests. I found that without "--enable-dmalloc" PHP CLI runs OK.

No more realloc() errors on "make test". But appears a message saying that it found a possible PHP error.

I pasted the text below.

--
=====================================================================
FAILED TEST SUMMARY
---------------------------------------------------------------------
Error message handling (with ZendOptimizer) [tests/run-test/test008.phpt]
Convert warnings to exceptions [tests/lang/038.phpt]
Bug #32828 (Throwing exception in output_callback function with ob_start and ob_end_clean leads to segfault) [tests/lang/bug32828.phpt]
Bug #32290 (calling call_user_func_array() ends in infinite loop within child class) [Zend/tests/bug32290.phpt]
Bug #36268 (Object destructors called even after fatal errors) [Zend/tests/bug36268.phpt]
Bug #41421 (Uncaught exception from a stream wrapper segfaults) [Zend/tests/bug41421.phpt]
easter_date() [ext/calendar/tests/easter_date.phpt]
unixtojd() [ext/calendar/tests/unixtojd.phpt]
date OO cloning [ext/date/tests/oo_002.phpt]
Bug #38474 (getAttribute select attribute by order, even when prefixed) (OK to fail with libxml2 < 2.6.2x) [ext/dom/tests/bug38474.phpt]
Bug #42082 (NodeList length zero should be empty) [ext/dom/tests/bug42082.phpt]
iconv stream filter [ext/iconv/tests/iconv_stream_filter.phpt]
Bug #41567 (json_encode() double conversion is inconsistent with PHP) [ext/json/tests/bug41567.phpt]
SPL: spl_autoload() with methods [ext/spl/tests/spl_autoload_005.phpt]
SPL: spl_autoload() with inaccessible methods [ext/spl/tests/spl_autoload_007.phpt]
SPL: spl_autoload() with exceptions [ext/spl/tests/spl_autoload_008.phpt]
Test array_map() function [ext/standard/tests/array/array_map.phpt]
Test array_reverse() function : usage variations - assoc. array with diff. value for 'array' argument [ext/standard/tests/array/array_reverse_variation5.phpt]
Test array_unshift() function : usage variations - assoc. array with diff values for 'array' argument [ext/standard/tests/array/array_unshift_variation5.phpt]
Bug #35821 (array_map() segfaults when exception is throwed from the callback) [ext/standard/tests/array/bug35821.phpt]
Bug #38450 (constructor is not called for classes used in userspace stream wrappers) [ext/standard/tests/file/bug38450_2.phpt]
proc_open() regression test 1 (proc_open() leak) [ext/standard/tests/file/proc_open01.phpt]
register_shutdown_function() & __call [ext/standard/tests/general_functions/010.phpt]
Bug #32647 (Using register_shutdown_function() with invalid callback can crash PHP) [ext/standard/tests/general_functions/bug32647.phpt]
Bug #40398 (parent and self callback functions erroneously called statically) [ext/standard/tests/general_functions/bug40398.phpt]
Test is_callable() function [ext/standard/tests/general_functions/is_callable.phpt]
htmlentities() test 2 (setlocale / fr_FR.ISO-8859-15) [ext/standard/tests/strings/htmlentities02.phpt] (warn: possibly braindead libc)
htmlentities() test 4 (setlocale / ja_JP.EUC-JP) [ext/standard/tests/strings/htmlentities04.phpt] (warn: possibly braindead libc)
htmlentities() test 15 (setlocale / KOI8-R) [ext/standard/tests/strings/htmlentities15.phpt] (warn: possibly braindead libc)
Test vsprintf() function : usage variations - string formats with non-string values [ext/standard/tests/strings/vsprintf_variation8.phpt]
Bug #32001 (xml_parse*() goes into infinite loop when autodetection in effect), using UTF-* [ext/xml/tests/bug32001.phpt]
CLI long options [sapi/cli/tests/015.phpt]
=====================================================================

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Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows (zip):
 
  http://snaps.php.net/win32/php5.2-win32-latest.zip

For Windows (installer):

  http://snaps.php.net/win32/php5.2-win32-installer-latest.msi

And note: --enable-dmalloc is for debugging purposes only! Do not use if you don't really need it.

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".

I still get the exact same result trying to compile php 5.2.6 on centos 4.7 (RHEL clone). Runing configure with or without --enable-dmalloc does not change the outcome.

Bug #32001 (xml_parse*() goes into infinite loop when autodetection in effect), using UTF-* [ext/xml/tests/bug32001.phpt]