stevesu@bronze.UUCP (Steve Summit) (09/30/83)
Here's a weird problem: I have a large program, consisting of many source files, which I have been modifying. Most of the modifications are conditionally compiled. I wanted to find out which files had been changed for good, i.e. whether conditionally compiled or not. I had one directory full of the modified files, and one full of the originals. I cc'ed everything -c. To my surprise, every .o file was at least one byte different, even those whose source files had not changed at all (not even conditionally). nm revealed that the c compiler had picked different names for some local labels. The only thing different in the compilations was the location (in the filesystem) of the source files, and the time of day. I compiled them several times and the labels always came out the same in a given directory, so the time-of-day dependence is out. Does anyone understand how cc's behavior can be affected by the directory the source files are in? This never happened to me when I worked under 2.8bsd, so it may be specific to the 4.1?bsd that I'm using now. Steve Summit tektronix!tekmdp!stevesu