Anekdoten / Bill Cox ‹ber Das Linken
 
StartSeite | Anekdoten/ | Neues | TestSeite | ForumSeite | Teilnehmer | Kategorien | Index | Hilfe | Einstellungen | ńndern

Bill Cox, 22 Aug 03, news:news.digitalmars.com/D

Giancarlo Bellido wrote:
> I don't know that much about compilers, and I've been wondering why is
> the linker necessary. Is it really necessary
...

I like to say (just because it's fun) that "The C linker is the Root of 
All Evil."  Being compatible with it leads to hacked C++ template 
support.  Most C++ programmers know about name mangling.  Optimization 
across files still generally sucks (there are some fairly new compilers 
that globally optimize).

The reason for the linker is mainly historical.  Back in high school, I 
had a job programming a PDP-11/45.  It had a whopping 128K of core 
memory (actual magnetic cores used for each bit).  We shared it between 
8 users at a time.  My max memory allocation was 16K bytes.

The compilers had to run off disk, in little pieces.  We had "4 pass 
compilers", which were slower than "3 pass compilers."  That meant that 
the source code had to be read 3 times instead of 4, which was the 
bottleneck in compilation speed.

After creating all the obect files, the linker ran.  That was always 
fun.  We had these washing machine sized hard disks, and the linker 
sensitized an oscillation mode.  Whenever we linked, one of these huge 
things would rock back and forth making a terrible niose, and then start 
walking around the room!

I guess I haven't been fond of linkers ever since.

Bill


StartSeite | Anekdoten/ | Neues | TestSeite | ForumSeite | Teilnehmer | Kategorien | Index | Hilfe | Einstellungen | ńndern
Text dieser Seite šndern (zuletzt gešndert: 22. August 2003 20:57 (diff))
Suchbegriff: gesucht wird
im Titel
im Text