[help-GIFT] gift will not compile

[Gregg Morris]

After configure, during "make"  I get these errors and program exits.
====
In file included from 
../../libInvertedFile/include/CIDRelevanceLevelPairList.h:49,
                 from ../../libInvertedFile/include/CAcHierarchy.h:33,
                 from CAcHierarchy.cc:25:
../../libInvertedFile/include/CIDRelevanceLevelPair.h: In method `bool 
CSortByID_IRLP::operator() 
(const CIDRelevanceLevelPair &, const CIDRelevanceLevelPair &)':
../../libInvertedFile/include/CIDRelevanceLevelPair.h:131: `fabs' undeclared 
(first use this function)
../../libInvertedFile/include/CIDRelevanceLevelPair.h:131: (Each undeclared 
identifier is reported only 
once for each function it appears in.)
make[2]: *** [CAcHierarchy.o] Error 1
make[2]: Leaving directory `/tmp/gift-0.1.4e/libInvertedFile/cc'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/gift-0.1.4e/libInvertedFile'
make: *** [all-recursive] Error 1
address@hidden gift-0.1.4e]# 
=====
 OR
=====
../../libMRML/include/CIDRelevanceLevelPair.h: In method `bool 
CSortByID_IRLP::operator() (const 
CIDRelevanceLevelPair &, const CIDRelevanceLevelPair &)':
../../libMRML/include/CIDRelevanceLevelPair.h:131: `fabs' undeclared (first use 
this function)
../../libMRML/include/CIDRelevanceLevelPair.h:131: (Each undeclared identifier 
is reported only once 
for each function it appears in.)
../../libMRML/include/CSelfDestroyPointer.h: In method `T 
*CSelfDestroyPointer<T>::operator= (T *) 
[with T = CXMLElement]':
CAccessorFactoryContainer.cc:61:   instantiated from here
../../libMRML/include/CSelfDestroyPointer.h:88: warning: no return statement in 
function returning 
non-void
make[3]: *** [CAccessorFactoryContainer.lo] Error 1
make[3]: Leaving directory `/tmp/gift-0.1.6pre2/libMRML/cc'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/gift-0.1.6pre2/libMRML'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/gift-0.1.6pre2'
make: *** [all-recursive-am] Error 2
address@hidden gift-0.1.6pre2]# 

This is RedHat Linux 7.0, kernel 2.2.16, perl 5.6.0

How can I get this to compile?

TIA,

Gregg
-- 
I took a speed reading course and read 'War and Peace' in twenty
minutes.  It involves Russia.    - Woody Allen