Description:
------------
The latest PECL xdiff, 1.5.1 beta, does not compile under PHP 5.4.0RC2. (The 
latest stable version, 1.4.1, is so old that it doesn't even run under PHP 5.3.)

libxdiff-0.23 is installed. The same procedure worked fine under PHP 5.3.4.

Is there anything we can do to help find/fix this bug? xdiff is essential to our 
application, we cannot move to PHP 5.4 because of this problem...

Expected result:
----------------
Successful "make".

Actual result:
--------------
[digicol@dcxcentosvmware intl]$ sudo pecl install xdiff-beta
downloading xdiff-1.5.1.tgz ...
Starting to download xdiff-1.5.1.tgz (9,147 bytes)
.....done: 9,147 bytes
4 source files, building
running: phpize
Configuring for:
PHP Api Version:         20100412
Zend Module Api No:      20100525
Zend Extension Api No:   220100525
libxdiff library installation dir? [autodetect] : 
building in /tmp/pear/temp/pear-build-rootYV6Dsp/xdiff-1.5.1
running: /tmp/pear/temp/xdiff/configure --with-xdiff
checking for egrep... grep -E
checking for a sed that does not truncate output... /bin/sed
checking for cc... cc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ANSI C... none needed
checking how to run the C preprocessor... cc -E
checking for icc... no
checking for suncc... no
checking whether cc understands -c and -o together... yes
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking for PHP prefix... /usr/local
checking for PHP includes... -I/usr/local/include/php -
I/usr/local/include/php/main -I/usr/local/include/php/TSRM -
I/usr/local/include/php/Zend -I/usr/local/include/php/ext -
I/usr/local/include/php/ext/date/lib
checking for PHP extension directory... /usr/local/lib/php/extensions/no-debug-
non-zts-20100525
checking for PHP installed headers prefix... /usr/local/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for re2c... no
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate 
PHP parsers.
checking for gawk... gawk
checking for xdiff support... yes, shared
checking for xdiff files in default path... found in /usr/local
checking for dlopen in -ldl... yes
checking for xdl_diff in -lxdiff... yes
checking if XDL_PATCH_IGNOREBSPACE is defined... yes
checking for xdl_set_allocator in -lxdiff... yes
checking for xdl_rabdiff in -lxdiff... yes
checking for ld used by cc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for /usr/bin/ld option to reload object files... -r
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
checking how to recognize dependent libraries... pass_all
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking dlfcn.h usability... yes
checking dlfcn.h presence... yes
checking for dlfcn.h... yes
checking the maximum length of command line arguments... 98304
checking command to parse /usr/bin/nm -B output from cc object... ok
checking for objdir... .libs
checking for ar... ar
checking for ranlib... ranlib
checking for strip... strip
checking if cc supports -fno-rtti -fno-exceptions... no
checking for cc option to produce PIC... -fPIC
checking if cc PIC flag -fPIC works... yes
checking if cc static flag -static works... yes
checking if cc supports -c -o file.o... yes
checking whether the cc linker (/usr/bin/ld -m elf_x86_64) supports shared 
libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no

creating libtool
appending configuration tag "CXX" to libtool
configure: creating ./config.status
config.status: creating config.h
running: make
/bin/sh /tmp/pear/temp/pear-build-rootYV6Dsp/xdiff-1.5.1/libtool --mode=compile 
cc  -I. -I/tmp/pear/temp/xdiff -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-
rootYV6Dsp/xdiff-1.5.1/include -I/tmp/pear/temp/pear-build-rootYV6Dsp/xdiff-
1.5.1/main -I/tmp/pear/temp/xdiff -I/usr/local/include/php -
I/usr/local/include/php/main -I/usr/local/include/php/TSRM -
I/usr/local/include/php/Zend -I/usr/local/include/php/ext -
I/usr/local/include/php/ext/date/lib -I/usr/local/include  -DHAVE_CONFIG_H  -g -
O2   -c /tmp/pear/temp/xdiff/xdiff.c -o xdiff.lo
mkdir .libs
 cc -I. -I/tmp/pear/temp/xdiff -DPHP_ATOM_INC -I/tmp/pear/temp/pear-build-
rootYV6Dsp/xdiff-1.5.1/include -I/tmp/pear/temp/pear-build-rootYV6Dsp/xdiff-
1.5.1/main -I/tmp/pear/temp/xdiff -I/usr/local/include/php -
I/usr/local/include/php/main -I/usr/local/include/php/TSRM -
I/usr/local/include/php/Zend -I/usr/local/include/php/ext -
I/usr/local/include/php/ext/date/lib -I/usr/local/include -DHAVE_CONFIG_H -g -O2 
-c /tmp/pear/temp/xdiff/xdiff.c  -fPIC -DPIC -o .libs/xdiff.o
/tmp/pear/temp/xdiff/xdiff.c:93: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘xdiff_functions’
/tmp/pear/temp/xdiff/xdiff.c:123: error: ‘xdiff_functions’ undeclared here (not 
in a function)
make: *** [xdiff.lo] Error 1
ERROR: `make' failed