RE: [microblaze-uclinux] compilation of ffmpeg with profiling enable

["Jim Van Vorst" <jvanvorst@xxxxxxxxx>]

Doesn't compiling with gprof insert a call to mcount() at every function call entry?

You need to write a mcount function or find the gnu implementation somewhere.

---

From: owner-microblaze-uclinux@xxxxxxxxxxxxxxxxxxxx [mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Nicolas Herve
Sent: Friday, May 15, 2009 1:33 PM
To: microblaze-uclinux
Subject: [microblaze-uclinux] compilation of ffmpeg with profiling enable

First I succeed in cross-compiling and running ffmpeg-0.5 on the 
microblaze.
I compiled it simply with these configure 
option

./configure --cross-prefix=mb-linux- --arch=microblaze

and 
I then test on the target with the following command `ffmpeg -i foreman.264 
foreman.yuv`.
The resulting file is binary equal to the one generated on the 
host with the same command [1].

Now I want to do some profiling on the 
target.
So I recompile the source with these configuration 
[2].

./configure --prefix=/usr/local --cross-prefix=mb-linux- 
--arch=microblaze --enable-gprof --build-suffix=-prof

then when making, I 
have the compilation errors included at end of this mail.
Any idea ? 
There is no such problem on the native host compiler build with 
:
./configure --prefix=/usr/local --enable-gprof 
--build-suffix=-prof

Has anybody allready used the gprof tool with 
microblaze binaries ?


Nicolas

---
[1] Yes it is about 500 
times slower than on the host (a Core2 Quad @1.6 GHz), but it is for an 
experimentation.
[2] Indeed, I use two separates build directory 
builds/default and builds/prof and run the configure script for here 
(../../configure [opts])
---


mb-linux-gcc 
-L"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavdevice 
-L"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavformat 
-L"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavcodec 
-L"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavutil 
-rdynamic -export-dynamic -Wl,--warn-common -Wl,--as-needed 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libpostproc 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libswscale 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavfilter 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavdevice 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavformat 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavcodec 
-Wl,-rpath-link,"/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/builds/prof"/libavutil 
-Wl,-Bsymbolic -p -o ffmpeg_g ffmpeg.o cmdutils.o -lavdevice-prof 
-lavformat-prof -lavcodec-prof -lavutil-prof -lm -ldl -ldl
ffmpeg.o: In 
function 
`opt_video_rc_override_string':
/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:2290: 
undefined reference to `_mcount'
ffmpeg.o: In function 
`opt_video_standard':
/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:2613: 
undefined reference to `_mcount'
ffmpeg.o: In function 
`opt_vstats_file':
/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:3671: 
undefined reference to `_mcount'
ffmpeg.o: In function 
`opt_audio_channels':
/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:2602: 
undefined reference to `_mcount'
ffmpeg.o: In function 
`opt_audio_rate':
/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:2596: 
undefined reference to 
`_mcount'
ffmpeg.o:/home/users/nicolas/xilinx/petalinux/software/third-party/build/ffmpeg-0.5/ffmpeg.c:2576: 
more undefined references to `_mcount' follow
collect2: ld returned 1 exit 
status
make: *** [ffmpeg_g] Error 1