https://issues.dlang.org/show_bug.cgi?id=24293
--- Comment #2 from kdevel <[email protected]> --- (In reply to Walter Bright from comment #1) > Try it serially. I did so before and it worked (surprisingly!). But when it came to make -j4 the non-reentrancy of dmd showed up. The cause of the problem is, that for every import statement dmd invokes cpp to generate for each header file $h.h a preprocessed $h.i (pure C file). This can be prevented by creating the .i file with cpp -m64 -dD -Wno-builtin-macro-redefined cmysql.c -include [...]dmd2/linux/bin64/../../src/druntime/import/importc.h cmysql.i once and before starting the compilation of the dependent D source files. I would appreciate if dmd had a switch to generate the .i from the .c. A short note in the docs would be nice, too. --
