Problem with flex?

[Christer Solskogen]

I'm compiling gcc-4.7 (from subversion) on a Debian stable and I'm 
bumping my head with an error I cant seem to figure out:

gcc -c   -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual 
-Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute 
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings 
-Wold-style-definition -Wc++-compat  -Wno-error -DHAVE_CONFIG_H 
-DGENERATOR_FILE -I. -Ibuild -I/home/solskogen/src/gcc/gcc 
-I/home/solskogen/src/gcc/gcc/build 
-I/home/solskogen/src/gcc/gcc/../include 
-I/home/solskogen/src/gcc/gcc/../libcpp/include 
-I/home/solskogen/obj/tools.staging/include 
-I/home/solskogen/src/gcc/gcc/../libdecnumber 
-I/home/solskogen/src/gcc/gcc/../libdecnumber/bid -I../libdecnumber    \
         -o build/gengtype-lex.o gengtype-lex.c
gengtype-lex.c:309: error: expected specifier-qualifier-list before 
‘flex_int32_t’
gengtype-lex.c:311: warning: struct has no members
gengtype-lex.c:312: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_accept’
gengtype-lex.c:364: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:366: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_ec’
gengtype-lex.c:396: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:398: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_meta’
gengtype-lex.c:407: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:409: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_base’
gengtype-lex.c:466: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:468: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_def’
gengtype-lex.c:525: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:527: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_nxt’
gengtype-lex.c:695: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c:697: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘yy_chk’
gengtype-lex.c:865: warning: ISO C does not allow extra ‘;’ outside of a 
function
gengtype-lex.c: In function ‘yylex’:
gengtype-lex.c:1173: error: ‘yy_ec’ undeclared (first use in this function)
gengtype-lex.c:1173: error: (Each undeclared identifier is reported only 
once
gengtype-lex.c:1173: error: for each function it appears in.)
gengtype-lex.c:1174: error: ‘yy_accept’ undeclared (first use in this 
function)
gengtype-lex.c:1179: error: ‘yy_chk’ undeclared (first use in this function)
gengtype-lex.c:1179: error: ‘yy_base’ undeclared (first use in this 
function)
gengtype-lex.c:1181: error: ‘yy_def’ undeclared (first use in this function)
gengtype-lex.c:1183: error: ‘yy_meta’ undeclared (first use in this 
function)
gengtype-lex.c:1185: error: ‘yy_nxt’ undeclared (first use in this function)
gengtype-lex.c: In function ‘yy_get_next_buffer’:
gengtype-lex.c:1824: warning: comparison between signed and unsigned 
integer expressions
gengtype-lex.c: In function ‘yy_get_previous_state’:
gengtype-lex.c:1878: error: ‘yy_ec’ undeclared (first use in this function)
gengtype-lex.c:1879: error: ‘yy_accept’ undeclared (first use in this 
function)
gengtype-lex.c:1884: error: ‘yy_chk’ undeclared (first use in this function)
gengtype-lex.c:1884: error: ‘yy_base’ undeclared (first use in this 
function)
gengtype-lex.c:1886: error: ‘yy_def’ undeclared (first use in this function)
gengtype-lex.c:1888: error: ‘yy_meta’ undeclared (first use in this 
function)
gengtype-lex.c:1890: error: ‘yy_nxt’ undeclared (first use in this function)
gengtype-lex.c: In function ‘yy_try_NUL_trans’:
gengtype-lex.c:1907: error: ‘yy_accept’ undeclared (first use in this 
function)
gengtype-lex.c:1912: error: ‘yy_chk’ undeclared (first use in this function)
gengtype-lex.c:1912: error: ‘yy_base’ undeclared (first use in this 
function)
gengtype-lex.c:1914: error: ‘yy_def’ undeclared (first use in this function)
gengtype-lex.c:1916: error: ‘yy_meta’ undeclared (first use in this 
function)
gengtype-lex.c:1918: error: ‘yy_nxt’ undeclared (first use in this function)
make[2]: *** [build/gengtype-lex.o] Error 1
make[2]: Leaving directory `/home/solskogen/obj/gcc.tools.staging.1/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/home/solskogen/obj/gcc.tools.staging.1'
make: *** [all] Error 2


Hints, anyone? I have flex installed.