有请线上大神，如下是编译过程中的讯息，不晓得如何解决(...>_<):
/home/linus/Downloads/src/k3b-2.0.2/libk3b/tools/k3bwavefilewriter.cpp:125:9:
error: narrowing conversion of ‘177’ from ‘int’ to ‘char’ inside { }
[-Wnarrowing]
libk3b/CMakeFiles/k3b.dir/build.make:350: recipe for target
'libk3b/CMakeFiles/k3b.dir/tools/k3bwavefilewriter.cpp.o' failed
make[2]: *** [libk3b/CMakeFiles/k3b.dir/tools/k3bwavefilewriter.cpp.o] Error
1
CMakeFiles/Makefile2:224: recipe for target 'libk3b/CMakeFiles/k3b.dir/all'
failed
make[1]: *** [libk3b/CMakeFiles/k3b.dir/all] Error 2
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2

看一下 k3b 的需求编译器/make 的版本

source code 是 vanilla 还是 apt source 下来的？

已解决，看来是我混用rpository的关系。