a question about compiling ogr!

Hi
I tried to install Georg beyerle's ogr but some
problems arised;
I installed RTAI-24.1.10 on redhat 9 kernel 2.4.19 but
 I got some errors on mathcalls,
anybody have an idea?

the error is :
In file included from
/home/rtai-24.1.10/include/math.h:63,
                 from w_acos.c:21:
/usr/include/bits/mathcalls.h:55: syntax error before
"extern"
/usr/include/bits/mathcalls.h:89: syntax error before
"extern"
/usr/include/bits/mathcalls.h:101: syntax error before
"extern"
/usr/include/bits/mathcalls.h:129: syntax error before
"extern"
/usr/include/bits/mathcalls.h:154: syntax error before
"extern"
/usr/include/bits/mathcalls.h:163: syntax error before
"extern"
/usr/include/bits/mathcalls.h:179: syntax error before
"extern"
/usr/include/bits/mathcalls.h:202: syntax error before
"extern"
In file included from
/home/rtai-24.1.10/include/math.h:82,
                 from w_acos.c:21:
/usr/include/bits/mathcalls.h:55: syntax error before
"extern"
/usr/include/bits/mathcalls.h:89: syntax error before
"extern"
/usr/include/bits/mathcalls.h:101: syntax error before
"extern"
/usr/include/bits/mathcalls.h:129: syntax error before
"extern"
/usr/include/bits/mathcalls.h:154: syntax error before
"extern"
/usr/include/bits/mathcalls.h:163: syntax error before
"extern"
/usr/include/bits/mathcalls.h:179: syntax error before
"extern"
/usr/include/bits/mathcalls.h:202: syntax error before
"extern"
In file included from
/home/rtai-24.1.10/include/math.h:99,
                 from w_acos.c:21:
/usr/include/bits/mathcalls.h:55: syntax error before
"extern"
/usr/include/bits/mathcalls.h:89: syntax error before
"extern"
/usr/include/bits/mathcalls.h:101: syntax error before
"extern"
/usr/include/bits/mathcalls.h:129: syntax error before
"extern"
/usr/include/bits/mathcalls.h:154: syntax error before
"extern"
/usr/include/bits/mathcalls.h:163: syntax error before
"extern"
/usr/include/bits/mathcalls.h:179: syntax error before
"extern"
/usr/include/bits/mathcalls.h:202: syntax error before
"extern"
make[1]: *** [w_acos.o] Error 1
make[1]: Leaving directory `/home/rtai-24.1.10/libm'
make: *** [_mod_libm] Error 2

regards


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