Comment 3 for bug 579909

I'm not sure it's the compiler, here's the point where it fails, first is my try, second is the try I found on a clean installed karmic on the efikamx:

set -ex; \
        for file in ../include/mysql/plugin.h ../include/mysql.h; do \
                 gcc -E -nostdinc -dI \
                          -I../include \
                          -I../include/mysql \
                          -I../sql \
                          -I./include \
                          -I./include/mysql \
                          -I./sql \
                                         $file 2>/dev/null | \
                          /bin/sed -e '/^# /d' \
                                    -e '/^[ ]*$/d' \
                                    -e '/^#pragma GCC set_debug_pwd/d' \
                                    -e '/^#ident/d' > \
                                               ./abi_check.out; \
                          /usr/bin/diff -w $file.pp ./abi_check.out; \
                          /bin/rm ./abi_check.out; \
        done
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql/plugin.h
+ /usr/bin/diff -w ../include/mysql/plugin.h.pp ./abi_check.out
+ /bin/rm ./abi_check.out
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'
+ /usr/bin/diff -w ../include/mysql.h.pp ./abi_check.out
2,674d1
< typedef char my_bool;
< typedef int my_socket;
< #include "mysql_version.h"
< #include "mysql_com.h"
< enum enum_server_command

..........

set -ex; \
        for file in ../include/mysql/plugin.h ../include/mysql.h; do \
                 gcc -E -nostdinc -dI \
                          -I../include \
                          -I../include/mysql \
                          -I../sql \
                          -I./include \
                          -I./include/mysql \
                          -I./sql \
                                         $file 2>/dev/null | \
                          /bin/sed -e '/^# /d' \
                                    -e '/^[ ]*$/d' \
                                    -e '/^#pragma GCC set_debug_pwd/d' \
                                    -e '/^#ident/d' > \
                                               ./abi_check.out; \
                          /usr/bin/diff -w $file.pp ./abi_check.out; \
                          /bin/rm ./abi_check.out; \
        done
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql/plugin.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'
+ /usr/bin/diff -w ../include/mysql/plugin.h.pp ./abi_check.out
+ /bin/rm ./abi_check.out
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'
+ /usr/bin/diff -w ../include/mysql.h.pp ./abi_check.out
+ /bin/rm ./abi_check.out
make[3]: Leaving directory `/home/markos/mysql-dfsg-5.1-5.1.37/builddir'
make[2]: Leaving directory `/home/markos/mysql-dfsg-5.1-5.1.37/builddir'
Making all in include
make[2]: Entering directory `/home/markos/mysql-dfsg-5.1-5.1.37/builddir/include'
/usr/bin/make all-am

................

See the difference? himt, this is what breaks the build:
(mine)
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql/plugin.h

(original)
+ for file in ../include/mysql/plugin.h ../include/mysql.h
+ gcc -E -nostdinc -dI -I../include -I../include/mysql -I../sql -I./include -I./include/mysql -I./sql ../include/mysql/plugin.h
+ /bin/sed -e '/^# /d' -e '/^[ ]*$/d' -e '/^#pragma GCC set_debug_pwd/d' -e '/^#ident/d'

I'll look into it a bit more.