David R. Morrison wrote:
>
>
> Begin forwarded message:
[]
>> Let me restart. I got a new mac running 10.6.2. I installed xfig using fink.
>> I
>> cannot change the font of TEXT objects. No matter what font I choose, the
>> TEXT
>> objects always stick with the "Default" font.
Found it. This is due to a very weird bug in Snow Leopard's gcc-4.2
compiler optimization concerning a funny typecast in the file
w_fontpanel.c in the xfig sources.
Here is a little program that shows the bug:
#include<stdio.h>
typedef char * caddr_t;
int main(){
int i;
for(i=0; i<6; i++){
printf("i: %d, i-1: %d\n",(caddr_t) i, (caddr_t)(i-1));
}
}
If you compile this with Snow Leopard's gcc (=gcc-4.2), then
- if you use no optimization or -O0 or -O1, the program runs correctly,
i.e. you get two columns, the first from 0 to 5, the second from -1 to
4. The same result is obtained with gcc-4.0 and any level of optimization.
- if you use gcc -O2 or -Os or above, then the second column stays at -1
and does not increment. This is the behavior in xfig, where the font
number -1 corresponds to the default postscript font. For the latex
fonts, this bug does not show up, because there the fonts are numbered
starting from 0 and not from -1.
If you start the loop from at -1 instead of 0, then it is the first
column that does not increment. Somehow the compiler "optimizes" that
typecast to give -1 in the whole loop if the first value was -1.
The workaround is simple: In xfig.info, in the CompileScript between
the lines
xmkmf
and
make PREFIX=%p
insert a line
make PREFIX=%p CDEBUGFLAGS=-O0 w_fontpanel.o
I tested this on 10.6/64, but I don't see why it shouldn't work anywhere
else, too.
--
Martin
------------------------------------------------------------------------------
ThinkGeek and WIRED's GeekDad team up for the Ultimate
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
lucky parental unit. See the prize list and enter to win:
http://p.sf.net/sfu/thinkgeek-promo
_______________________________________________
Fink-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/fink-users
