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b1b44f777c
This file is a little confusing: it provides all of the mallocr logic, but is compiled multiple times to produce a unique symbol each time. For example, building mallocr.c with -DDEFINE_FREER produces freer.o that only defines _free_r(). This is fine for most symbols, but it's a little confusing when defining mallocr itself -- we produce a file with the same symbol name, but we still need -DDEFINE_MALLOCR. In order to move the logic from the build rules to source files, using mallocr.c both as a multiplexer and for defining a single symbol is a bit tricky. It's possible (if we add a lot of redundant preprocessor checks to mallocr.c, or we add complicated build flags just for this one files), but it's easier if we simply rename this to a dedicated file. So let's do that. We do this as a dedicated commit because the next one will create a new mallocr.c file and git's automatic diff algorithms can handle trivial renames, but it can't handle renames+creates in the same commit.