[mythtv] Help with ccache errors

TimP mythtv at corky.co
Fri Dec 10 16:37:13 UTC 2021

Hi All,

I can't build Debian packages any more. I'm not sure when this started, 
as I haven't built for a few months, but I'm getting a weird error that 
I can't figure out. I use a git checkout of the packaging repo on a 
Debian Bullseye AMD64 system. I ahve to remove the linux-kernel-headers 
and libcrystallhd lines from the packaging/ded/debian/control.in, but I' 
pretty sure that is not te cause. The tail of build-debs.sh looks like 

cd mythtv && sh version.sh `pwd`
Using /home/tim/LocalPackages/git/mythtv-31/mythtv/mythtv/DESCRIBE
BRANCH: fixes/31
SOURCE_VERSION: v31.0+fixes.20211210.25f1bb1d12-0ubuntu0
install -m0755 -d 
cd mythtv && ./configure --compile-type=profile --prefix=/usr 
--runprefix=/usr --enable-lirc --enable-audio-alsa --enable-audio-oss 
--enable-dvb --enable-ivtv --enable-firewire --enable-joystick-menu 
--with-bindings=perl --enable-ffmpeg-pthreads --enable-pic 
--perl-config-opts="INSTALLDIRS=vendor" --enable-libvpx --enable-sdl 
--enable-libmp3lame --enable-libx264 --enable-vdpau --enable-vaapi
cc_default gcc ,
ERROR: cannot find taglib 1.7 or later.

Now, I know I have libtag1-dev installed, and it is at version 
1.11.1+dfsf.1-3. Looking in config.ep I find this at the end:

BEGIN /tmp/ffconf.Bq8s66A0/test.cpp
1 #include <taglib/fileref.h>
2 #include <stdlib.h>
3 int main(void) {
4 TagLib::FileRef obj1;
5 return 0; }
END /tmp/ffconf.Bq8s66A0/test.cpp
ccache g++ -Wdate-time -D_FORTIFY_SOURCE=2 -D_ISOC99_SOURCE 
-fstack-protector-strong -Wformat -Werror=format-security -I/usr/include 
-L/usr/lib/x86_64-linux-gnu -c -o /tmp/ffconf.Bq8s66A0/test.o 
ccache: error: Failed to create directory /run/user/0/ccache-tmp: 
Permission denied
ERROR: cannot find taglib 1.7 or later.

In fact, that file is full of ccache complaining about not being able to 
write to /run/user/0/ccache-tmp. I don't know where ccache is getting 
that path from, as my environment has this for temp files:


For some reason, ccache thinks I'm root when I'm not. I can compile that 
test.cpp using the same command line, and it is OK and I don't get the 
error. I'm suspecting somewhere in the build scripts the environment is 
getting mangled. Has anyone seen something like this? I don't want to be 
root when I build MythTV, but I may have to at this rate.


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