Get "warning: ignoring #pragma" warnings when using gcc to compile libol-0.3.16 on HP-UX

[Jenny-Lou Sequeira]

If I just run
#./configure CC=gcc CFLAGS="-v
#make
It compiles fine. Looking at the log from make, the include path is:
 .
 /usr/local/include
 /usr/local/lib/gcc/ia64-hp-hpux11.23/3.4.3/include
 /usr/include

However, if I restrict the "Include" path to the following 

./configure CC=gcc CFLAGS="-v -nostdinc -O2" CPPFLAGS="-I/usr/local/include
-I/usr/local/lib/gc/ia64-hphpux11.23/3.4.3/include -I/usr/include"

"make" spews out warnings like:
/usr/local/lib/gcc/ia64-hp-hpux11.23/3.4.3/include/stdlib.h:30: warning:
ignorin
g #pragma builtin_milli abs
/usr/local/lib/gcc/ia64-hp-hpux11.23/3.4.3/include/stdlib.h:31: warning:
ignorin
g #pragma extern abs
/usr/local/lib/gcc/ia64-hp-hpux11.23/3.4.3/include/stdlib.h:65: warning:
ignorin
g #pragma builtin_milli div

/usr/include/sys/signal.h:174: warning: ignoring #pragma extern signal
/usr/include/sys/signal.h:191: warning: ignoring #pragma extern kill
/usr/include/sys/signal.h:192: warning: ignoring #pragma extern sigismember
/usr/include/sys/signal.h:193: warning: ignoring #pragma extern sigpending

Thanks,
Jenny-Lou