Updates both the interactive and program DynFlags in a Session. This also reads the package database (unless it has already been read), and
#15541: package environment files and the GHC API -------------------------------------+------------------------------------- Reporter: lspitzner | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.6.1 Component: GHC API | Version: 8.4.3 Resolution: | Keywords: package | environment Operating System: Unknown/Multiple | Architecture: Type of failure: Documentation | Unknown/Multiple bug | Test Case: Blocked By: | Blocking: Related Tickets: #15513 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by lspitzner): The haddock on `setSessionDynFlags` currently reads: prepares the compilers knowledge about packages. It can be called again to load new packages: just add new package flags to (packageFlags dflags).
Returns a list of new packages that may need to be linked in using the
dynamic linker (see linkPackages) as a result of new package flags. If you are not doing linking or doing static linking, you can ignore the list of packages returned. I assume this is where package environment files are read. So in addition to nothing being documented, this semantic change was made to a function with the innocuous name of `setSessionDynFlags`. Please don't do that. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15541#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler