Greetings,
I inherited some code that had last been tested using gcc-2.9.5.3. Now I
am attempting to cimpile it using 3.2.2-5 (the revision of the GNU tools
delivered with RedHat 9.0). Here is the code snippet that is having
problems:
32 // hash function on strings
33 struct str_hash {
34 size_t operator()(const char* str) const {
35 size_t hashval = 0;
36 for ( ; *str; str++)
37 hashval = 5*hashval + *str; // shift and add
38
39 return hashval;
40 }
41 };
42
43
44 // equal_to function on strings
45 struct str_equal {
46 bool operator()(const char* s1, const char* s2) const {
47 return (strcmp(s1, s2) == 0);
48 }
49 };
50
51
52 // convenience template for mapping between name and pointer
53 template
54 class DRTINameMap : public hash_map
56 {
57 public:
58 DRTINameMap() :
59 hash_map() {}
60 DRTINameMap(const DRTINameMap& nmap) : hash_map(nmap) {}
};
Here are the compiler errors:
In file included from DRTI.hh:12,
from RegionInfo.cc:1:
DRTI_Factories.hh:54: parse error before `<' token
DRTI_Factories.hh:59: parse error before `&' token
DRTI_Factories.hh:59: ISO C++ forbids declaration of `DRTINameMap' with no
type
DRTI_Factories.hh: In function `int DRTINameMap(...)':
DRTI_Factories.hh:59: `int DRTINameMap(...)' redeclared as different kind
of
symbol
DRTI_Factories.hh:54: previous declaration of `template
class DRTINameMap'
DRTI_Factories.hh:54: previous non-function declaration `template class DRTINameMap'
DRTI_Factories.hh:59: conflicts with function declaration `int
DRTINameMap(...)
'
DRTI_Factories.hh:59: parse error before `<' token
DRTI_Factories.hh:59: only constructors take base initializers
DRTI_Factories.hh:59: confused by earlier errors, bailing out
make: *** [RegionInfo.lo] Error 1
Does anybody have any idea as to what changed from gcc 2.9 to gcc 3.X that
could cause this behavior? Based on my research, similar problems seem to
arise when you forget to specify std:: however, hash_map is not standard,
it's an extension. I'm trying to determine whether the code needs to
change, or if there is some configuration or compiler problem here.
Many thanks,
Ron Goodwyn
