我尝试了以下教程以及其他教程：
http://akyl.net/how-install-xhprof-profiler-ubuntu
http://erichogue.ca/2011/03/linux/profiling-a-php-application/
我不断收到以下错误消息：
running: make
/bin/bash /tmp/pear/install/pear-build-fieldnation1Iqjyy/xhprof-0.9.2/libtool --mode=compile cc -I. -I/tmp/pear/install/xhprof/extension -DPHP_ATOM_INC -I/tmp/pear/install/pear-build-fieldnation1Iqjyy/xhprof-0.9.2/include -I/tmp/pear/install/pear-build-fieldnation1Iqjyy/xhprof-0.9.2/main -I/tmp/pear/install/xhprof/extension -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DHAVE_CONFIG_H -g -O2 -c /tmp/pear/install/xhprof/extension/xhprof.c -o xhprof.lo
libtool: compile: cc -I. -I/tmp/pear/install/xhprof/extension -DPHP_ATOM_INC -I/tmp/pear/install/pear-build-fieldnation1Iqjyy/xhprof-0.9.2/include -I/tmp/pear/install/pear-build-fieldnation1Iqjyy/xhprof-0.9.2/main -I/tmp/pear/install/xhprof/extension -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DHAVE_CONFIG_H -g -O2 -c /tmp/pear/install/xhprof/extension/xhprof.c -fPIC -DPIC -o .libs/xhprof.o
In file included from /usr/include/php5/main/php.h:33:0,
from /tmp/pear/install/xhprof/extension/xhprof.c:27:
/usr/include/php5/main/php_config.h:2396:0: warning: "_GNU_SOURCE" redefined [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:24:0: note: this is the location of the previous definition
/tmp/pear/install/xhprof/extension/xhprof.c:236:1: warning: 'visibility' attribute ignored [-Wattributes]
/tmp/pear/install/xhprof/extension/xhprof.c:240:28: warning: 'visibility' attribute ignored [-Wattributes]
/tmp/pear/install/xhprof/extension/xhprof.c: In function 'hp_get_function_name':
/tmp/pear/install/xhprof/extension/xhprof.c:898:10: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:909:13: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:911:13: warning: assignment discards 'const' qualifier from pointer target type [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:930:34: error: 'znode_op' has no member named 'u'
/tmp/pear/install/xhprof/extension/xhprof.c:963:9: warning: passing argument 1 of 'hp_get_base_filename' discards 'const' qualifier from pointer target type [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:856:14: note: expected 'char *' but argument is of type 'const char *'
/tmp/pear/install/xhprof/extension/xhprof.c: In function 'hp_execute_internal':
/tmp/pear/install/xhprof/extension/xhprof.c:1650:24: error: 'znode_op' has no member named 'u'
/tmp/pear/install/xhprof/extension/xhprof.c:1651:59: error: 'struct <anonymous>' has no member named 'return_reference'
/tmp/pear/install/xhprof/extension/xhprof.c:1652:25: error: 'znode_op' has no member named 'u'
/tmp/pear/install/xhprof/extension/xhprof.c: In function 'hp_compile_file':
/tmp/pear/install/xhprof/extension/xhprof.c:1683:3: warning: passing argument 1 of 'hp_get_base_filename' discards 'const' qualifier from pointer target type [enabled by default]
/tmp/pear/install/xhprof/extension/xhprof.c:856:14: note: expected 'char *' but argument is of type 'const char *'
make: *** [xhprof.lo] Error 1
ERROR: `make' failed
基本上，'make' 无法运行。我该如何度过这个难关？