undefined reference to `__ctype_tolower'

Hello,

I'm trying to compile ORBit v0.5 and I've this message :

make[3]: Entering directory `/root/src/ORBit-0.5.17/src/daemons'
Making all in interface_repository
make[4]: Entering directory 
`/root/src/ORBit-0.5.17/src/daemons/interface_repository'
/bin/sh ../../../libtool --mode=link gcc  -g -O2  -o orbit-ird -static 
interface_repository-skels.o interface_repository-impl.o 
../../../src/orb/libORBit.la   ../../../src/IIOP/libIIOP.la    
../../../src/ORBitutil/libORBitutil.la         -L/usr/lib/ -lglib      -lm
gcc -g -O2 -o orbit-ird interface_repository-skels.o 
interface_repository-impl.o  ../../../src/orb/.libs/libORBit.a 
-L/usr/lib ../../../src/IIOP/.libs/libIIOP.a 
../../../src/ORBitutil/.libs/libORBitutil.a -L/usr/lib/ 
/usr/lib/libglib.a -lm
/usr/lib/libglib.a(gstrfuncs.o)(.text+0x7c5): In function `g_strdown':
: undefined reference to `__ctype_tolower'
/usr/lib/libglib.a(gstrfuncs.o)(.text+0x81c): In function `g_strup':
: undefined reference to `__ctype_toupper'
/usr/lib/libglib.a(gstrfuncs.o)(.text+0xaa1): In function `g_strchug':
: undefined reference to `__ctype_b'
/usr/lib/libglib.a(gstrfuncs.o)(.text+0xb54): In function `g_strchomp':
: undefined reference to `__ctype_b'
/usr/lib/libglib.a(gstring.o)(.text+0xb55): In function `g_string_down':
: undefined reference to `__ctype_tolower'
/usr/lib/libglib.a(gstring.o)(.text+0xbb5): In function `g_string_up':
: undefined reference to `__ctype_toupper'
collect2: ld returned 1 exit status
make[4]: *** [orbit-ird] Error 1
make[4]: Leaving directory 
`/root/src/ORBit-0.5.17/src/daemons/interface_repository'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/root/src/ORBit-0.5.17/src/daemons'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/root/src/ORBit-0.5.17/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/src/ORBit-0.5.17'
make: *** [all-recursive-am] Error 2

I'm compiling with gcc v3.4.3 and glib v2.x.
Can you help me please ?

Thx,

Fab.