Basile Starynkevitch <bas...@starynkevitch.net> writes: > What is the role of executable_checksum from c-common.h & generated by > genchecksum.
It is used for precompiled headers. It verifies that the precompiled header was generated by precisely the same compiler as the one trying to use the precompiled header. This approach is used because a precompiled header is essentially a memory dump of the compiler after parsing the header. It would not work to use a memory of one compiler in another compiler. > What is the reason of not having executable_checksum inside lto1 binary? lto1 does not use precompiled headers, and as such does not need executable_checksum. The executable_checksum variable only appears in those frontends which need it, namely the C family frontends. Ian
