[PATCH] Fix a compilation failure in Perl bindings

With some settings I'm getting compilation failure in Perl bindings.

cd /var/tmp/portage/dev-util/subversion-1.5_pre27184/work/subversion-1.5_pre27184/subversion/bindings/swig/perl/native; make
make[1]: Entering directory `/var/tmp/portage/dev-util/subversion-1.5_pre27184/work/subversion-1.5_pre27184/subversion/bindings/swig/perl/native'
i686-pc-linux-gnu-gcc -c  -I/usr/include/apr-1   -I/usr/include/apr-1 -I/usr/include/db4.6  -I../../../../../subversion/bindings/swig/perl/libsvn_swig_perl  -I../../../../../subversion/include  -I../../../../../subversion  -I../../../../../subversion/bindings/swig -g -fno-strict-aliasing -pipe -Wdeclaration-after-statement -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -march=athlon64 -msse3 -pipe -O2   -DVERSION=\"\" -DXS_VERSION=\"\" -fPIC "-I/usr/lib/perl5/5.8.8/i686-linux/CORE"   core.c
In file included from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:38,
                 from core.c:1562:
../../../../../subversion/svn_private_config.h:156:1: warning: "_" redefined
In file included from /usr/lib/perl5/5.8.8/i686-linux/CORE/perl.h:37,
                 from core.c:703:
/usr/lib/perl5/5.8.8/i686-linux/CORE/config.h:3808:1: warning: this is the location of the previous definition
In file included from /usr/include/apr-1/apr_pools.h:38,
                 from ../../../../../subversion/include/svn_time.h:26,
                 from core.c:1559:
/usr/include/apr-1/apr.h:284: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘apr_off_t’
In file included from ../../../../../subversion/include/svn_string.h:72,
                 from ../../../../../subversion/include/svn_props.h:31,
                 from ../../../../../subversion/include/svn_error_codes.h:49,
                 from ../../../../../subversion/include/svn_error.h:49,
                 from ../../../../../subversion/include/svn_time.h:29,
                 from core.c:1559:
/usr/include/apr-1/apr_strings.h:299: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
/usr/include/apr-1/apr_strings.h:315: error: expected ‘)’ before ‘*’ token
/usr/include/apr-1/apr_strings.h:351: error: expected ‘)’ before ‘size’
In file included from /usr/include/apr-1/apr_file_io.h:30,
                 from ../../../../../subversion/include/svn_io.h:31,
                 from ../../../../../subversion/include/svn_delta.h:36,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:36,
                 from core.c:1563:
/usr/include/apr-1/apr_file_info.h:204: error: expected specifier-qualifier-list before ‘apr_off_t’
In file included from ../../../../../subversion/include/svn_io.h:31,
                 from ../../../../../subversion/include/svn_delta.h:36,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:36,
                 from core.c:1563:
/usr/include/apr-1/apr_file_io.h:632: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
/usr/include/apr-1/apr_file_io.h:857: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
In file included from ../../../../../subversion/include/svn_delta.h:36,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:36,
                 from core.c:1563:
../../../../../subversion/include/svn_io.h:1123: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
In file included from ../../../../../subversion/include/svn_wc.h:47,
                 from ../../../../../subversion/include/svn_client.h:39,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:37,
                 from core.c:1563:
../../../../../subversion/include/svn_ra.h:181: error: expected ‘)’ before ‘progress’
../../../../../subversion/include/svn_ra.h:416: error: expected specifier-qualifier-list before ‘svn_ra_progress_notify_func_t’
In file included from ../../../../../subversion/include/svn_client.h:39,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:37,
                 from core.c:1563:
../../../../../subversion/include/svn_wc.h:1721: error: expected specifier-qualifier-list before ‘apr_off_t’
In file included from ../../../../../subversion/include/svn_client.h:45,
                 from ../../../../../subversion/bindings/swig/perl/libsvn_swig_perl/swigutil_pl.h:37,
                 from core.c:1563:
../../../../../subversion/include/svn_diff.h:221: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
../../../../../subversion/include/svn_diff.h:222: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
../../../../../subversion/include/svn_diff.h:223: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
../../../../../subversion/include/svn_diff.h:224: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
../../../../../subversion/include/svn_diff.h:225: error: expected declaration specifiers or ‘...’ before ‘apr_off_t’
...

I have found that it is caused by Makefile.PL.in not respecting CPPFLAGS, while some other files respect CPPFLAGS.
I'm attaching a patch.

[[[
Respect CPPFLAGS in Perl bindings.

* subversion/bindings/swig/perl/native/Makefile.PL.in: Set cppflags to CPPFLAGS, and use cppflags in config.

Patch by: arfrever
]]]

-- 
Arfrever Frehtes Taifersar Arahesis