Problem compiling root 4.01.04 with gcc 3.4.2

ROOT
1

HI,

I am trying to compile root v4.01.04 using gcc 3.4.2 running on a Fedora Core 3 system.
I seem to be getting a problem with the inline assembly part of asimage.c. The exact error is:

gcc -O3 -DNO_DEBUG_OUTPUT -fPIC -Iinclude -Iinclude -Iinclude -I/usr/X11R6/include -c asimage.c -o asimage.o
asimage.c: In function mmx_init': asimage.c:120: error: PIC registerebx’ clobbered in asm' make[1]: *** [asimage.o] Error 1 make[1]: Leaving directory/home/wplano/root/asimage/src/libAfterImage’
make: *** [asimage/src/libAfterImage/libAfterImage.a] Error 2

I’ve tried removing the offending clobber from root/asimage/src/libAfterImage/asimage.c but after I re-make my change appears to be undone.

Where can I remove this clobber permanently (or is this not a safe thing to do?)

Thanks,

Will.

PS. Can anyone tell me what a clobber is exactly? :slight_smile:

2

Hi Will,

to temporarily disable this asm code, you have to untar the libAfterImage.tar.gz, make this fix. retar and rebuild ROOT.

I am in the process of installing FC3 and will investigate this problem once I get it running.

Cheers, Fons.

3

Below is a reply from Sasha Vasko to my inquiry

When I try to compile libAfterImage provided with ROOT
(root.cern.ch) on Fedora Core 3 with gcc 3.4.2
I get the following error
gcc -O3 -DNO_DEBUG_OUTPUT -fPIC -I/usr/include/freetype2 -
I/usr/X11R6/include
-c asimage.c -o asimage.o
asimage.c: In function mmx_init': asimage.c:120: error: PIC register ebx’ clobbered in `asm’
make: *** [asimage.o] Error 1

I appreciate your comments/suggestions/solutions.

./configure --disable-mmx-optimization

should help you.

Otherwise I have no idea why you get the error - probably some new gcc
hiccup. I guess you also try and comment out lines with ebx in mmx_init()

Sasha

Commenting line 136 in asimage.c
// : “ebx”, “ecx”, “edx”
helped without adverse effects so far.

Michal

4

Where can I get that libAfterImage.tar.gz file?

Thank you,

Ivana

5

This file is included in the standard distribution and CVS.
When you install ROOT with the default options, this tar file is automatically untared and the corresponding Makefile executed.

Rene

6

Thank you, Rene, I see now the file, but it is still not clear to me how to fix the problem, reported by Will (that I need to solve, too).

Fons wrote:
"to temporarily disable this asm code, you have to untar the libAfterImage.tar.gz, make this fix. retar and rebuild ROOT."
What fix should I make here after untaring the file?

I tried also suggestion by “ml”:
./configure --disable-mmx-optimization
but this option was refused by configure.

I have Root v4.01.04a.

Thank you,

Ivana

7

This problem was fixed in CVS by Fons

Rene