Hi Everybody,
686-pc-linux-gnu 2.6.20
I've upgraded my original "LFS" software,
glibc-2.3.4/gcc-3.4.3
to "BLFS" glibc-2.5/gcc-4.1.2.
I was curious about how compiled files compare under
the old system and the new (apples to apples) so I ran
a few (unscientific) tests to this effect.
Looks like the new compiler/library increases the size
of the executables quite a bit. It's possible I'm
missing something although I cannot fathom it.
Bellow are the results using one simple C and C++ file
and several modules from an e2fsprogs-1.39 build
(sizes in bytes).
glibc-2.3.4 glibc-2.5
gcc-3.4.3 gcc-4.1.2 % Larger
HelloWorld 4546 7113 56.46
bjarne 7966 9966 25.10
dumpe2fs 26826 32499 21.15
e2fsck 1354457 2889537 113.34 (?)
fsck 40139 50043 24.67
mke2fs 84258 108100 28.30
tune2fs 52037 60319 15.91
Both glibc and gcc, whether the old versions or the new ones, were
built "by the book" (LFS/BLFS) under the same conditions.
The test programs were compiled/linked the same way:
gcc -o program program.c
g++ -o program program.cpp
The e2fsprogs-1.39 modules were built identically as well.
For reference, the test programs:
-- HelloWorld.c
#include <stdio.h>
int main() {
printf("Hello World!\n");
return 0;
}
-- bjarne.cpp
// I found this little program on Bjarne Stroustrup's site.
// He recommended it as an "entry-level" Pass/Fail test of
// a new compiler you'd be looking at.
#include<iostream>
#include<string>
using namespace std;
int main() {
string s;
cout << "Please enter your first name followed by a newline\n";
cin >> s;
cout << "Hello, " << s << '\n';
return 0; // this return statement isn't necessary
}
Comments are invited.
Thanks,
-- Alex
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