Commit 078b60f0 authored by Committed by Brad KingBrowse files
Embarcadero: Run at most one linker invocation at a time (#15620)
At least some versions (e.g. C++ Builder 5) of the bcc32 linker are known to write temporary files with a constant name to the current directory (e.g. "turboc.$ln"). (This can be verified by using Process Monitor to watch the file writes that bcc32 / ilink32 / implib make). This causes problems with some generators that keep a constant current directory and run concurrent linkers. For example, the Ninja generator, by default, always has the current directory set to the top of the build tree - resulting in conflicts between the linkers that are simultaneously trying to write to "turboc.$ln". Symptoms include direct errors regarding the "turboc.$ln" file, or later build steps failing due to corrupted output from previous links that happened to link "successfully." This is not a problem for the Borland Makefiles generator which does not run jobs in parallel. For the Ninja generator, work around this problem by using a link job pool of size 1.