Sylvester Ledru the result of rebuilding the Debian GNU/Linux package archive using the Clang 10 compiler instead of GCC. Out of 31014 packages, 1400 (4.5%) failed to build, but by applying an additional patch to the Debian toolkit, the number of unbuilt packages was reduced to 1110 (3.6%). For comparison, when building in Clang 8 and 9, the number of packages that could not be built was kept at 4.9%.
The assembly experiment focused on 250 problems caused by a failure due to in Qmake, and 177 problems, with the generation of various symbols in libraries. By adding a simple patch to dpkg-gensymbols to treat a symbol comparison error when linking as a warning, and replacing the g++ config files in qmake, it was possible to fix build failures of about 290 packages.
Of the rest , leading to build failure in Clang, the most common errors due to missing some header files, type casting, missing space between literal and identifier, linking problems, not returning a value from a non-void function, using ordered comparison of a pointer with null , lack of definitions.
Source: opennet.ru