Building log4cxx on linux2.4

Hello 
I am trying to build log4cxx on Linux 2.4.21-32.ELsmp and have installed 
apr-util-1.2.8 and  apr-1.2.9.
When I give make, I get the following error:

make[2]: Entering directory `/users/a24141/log4cxx-0.10.0/src/test'
Making all in cpp
make[3]: Entering directory `/users/a24141/log4cxx-0.10.0/src/test/cpp'
source='net/socketservertestcase.cpp' object='socketservertestcase.o'
libtool=no
 \
depfile='.deps/socketservertestcase.Po'
tmpdepfile='.deps/socketservertestcase.T
Po' \
depmode=gcc3 /bin/sh ../../../depcomp \
g++ -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
-DPACKAGE_
STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"log4cxx\"
-DVERSION=\"0.10.0\"
-DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1
-DHA
VE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
-DHAVE_ST
DINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DHAVE_UNISTD_H=1
-DHAVE_ALLOCA_H=1
 -I. -I. -I../../../src/main/include -I../../../src/main/include
-I/usr/local/in
clude -DLOG4CXX   -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE 
-I
/users/a24141/apr-1.2.9/include   -I/users/a24141/apr-util-1.2.8/include  
-g -O
2 -c -o socketservertestcase.o `test -f 'net/socketservertestcase.cpp' ||
echo '
./'`net/socketservertestcase.cpp
net/socketservertestcase.cpp: In constructor
   `ShortSocketServerLauncher::ShortSocketServerLauncher()':
net/socketservertestcase.cpp:116: `::fork' undeclared (first use here)
net/socketservertestcase.cpp:118: `::execl' undeclared (first use here)
net/socketservertestcase.cpp:125: `sleep' undeclared (first use this
function)
net/socketservertestcase.cpp:125: (Each undeclared identifier is reported
only
   once for each function it appears in.)
make[3]: *** [socketservertestcase.o] Error 1
make[3]: Leaving directory `/users/a24141/log4cxx-0.10.0/src/test/cpp'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/users/a24141/log4cxx-0.10.0/src/test'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/users/a24141/log4cxx-0.10.0/src'
make: *** [all-recursive] Error 1


Can anyone please let me know why I am getting the above stated error.
Regards
Manik Gupta.
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