[Spades-sim-devel] [ spades-sim-Bugs-1431546 ] Error in compiling for AMD64

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Bugs item #1431546, was opened at 2006-02-14 15:55
Message generated for change (Comment added) made by bramz
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Category: Configury/Installation
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Moein Alinaghian (masoft)
Assigned to: Nobody/Anonymous (nobody)
Summary: Error in compiling for AMD64

Initial Comment:
I tried to compile Spades 1.10 on one AMD64 computer, 
with Ubuntu 5.10 (AMD64 Version) with GCC 4, and got 
these errors:

testforker.cpp: In function void* pthread_func
(void*) :
testforker.cpp:122: error: cast from void* to int 
loses precision
make[2]: *** [testforker.o] Error 1
make[2]: Leaving directory `/usr/src/spades-
1.10/agent_intercept'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/spades-1.10'
make: *** [all] Error 2

Also needed to say it will compile correctly with 
Ubuntu 5.10 (i386 Version).

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Comment By: Bram de Greve (bramz)
Date: 2007-02-16 16:38

Message:
Logged In: YES 
user_id=792910
Originator: NO

I've encountered this problem as well.

The problem is of course that on AMD64, an int is 32 bits and void* 64
bits wide.
I've solved the issue by removing the reinterpret_cast because it's
perfectly valid to stream an address to std::cout (there's an overload
that takes a void pointer).  It will print the value of the pointer in
hexadecimal format.

If you want to (reinterpret) cast a pointer to an integer value, you
should use the intptr_t and uintptr_t typedefs from inttypes.h

Bramz

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