Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: 7fe84ea5 by Zubin Duggal at 2026-04-07T19:11:52+05:30 compiler: Warn when -finfo-table-map is used with -fllvm These are currently not supported together. Fixes #26435 - - - - - 6 changed files: - compiler/GHC/Driver/Session.hs - docs/users_guide/debug-info.rst - + testsuite/tests/driver/T26435.ghc.stderr - + testsuite/tests/driver/T26435.hs - + testsuite/tests/driver/T26435.stdout - testsuite/tests/driver/all.T Changes: ===================================== compiler/GHC/Driver/Session.hs ===================================== @@ -3895,6 +3895,11 @@ makeDynFlagsConsistent dflags hostFullWays in dflags_c + | gopt Opt_InfoTableMap dflags + , LlvmCodeOutput <- backendCodeOutput (backend dflags) + = loop (gopt_unset dflags Opt_InfoTableMap) + "-finfo-table-map is incompatible with -fllvm and is disabled (See #26435)" + | otherwise = (dflags, mempty, mempty) where loc = mkGeneralSrcSpan (fsLit "when making flags consistent") loop updated_dflags warning ===================================== docs/users_guide/debug-info.rst ===================================== @@ -370,6 +370,11 @@ to a source location. This lookup table is generated by using the ``-finfo-table also want more precise information about constructor info tables then you should also use :ghc-flag:`-fdistinct-constructor-tables`. + .. note:: + This flag is incompatible with :ghc-flag:`-fllvm`. If both flags are + enabled, GHC will emit a warning and :ghc-flag:`-finfo-table-map` will + have no effect. + The :ghc-flag:`-finfo-table-map` flag will increase the binary size by quite a lot, depending on how big your project is. For compiling a project the size of GHC the overhead was about 200 megabytes. ===================================== testsuite/tests/driver/T26435.ghc.stderr ===================================== @@ -0,0 +1,5 @@ +when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags (in -Wdefault)] + -finfo-table-map is incompatible with -fllvm and is disabled (See #26435) + +[1 of 2] Compiling Main ( T26435.hs, T26435.o ) +[2 of 2] Linking T26435 ===================================== testsuite/tests/driver/T26435.hs ===================================== @@ -0,0 +1,5 @@ +module Main where +import GHC.InfoProv + +main :: IO () +main = print =<< whereFrom main ===================================== testsuite/tests/driver/T26435.stdout ===================================== @@ -0,0 +1 @@ +Nothing ===================================== testsuite/tests/driver/all.T ===================================== @@ -337,3 +337,4 @@ test('T25382', normal, makefile_test, []) test('T26018', req_c, makefile_test, []) test('T24120', normal, compile, ['-Wunused-packages -hide-all-packages -package base -package system-cxx-std-lib']) test('T26551', [extra_files(['T26551.hs'])], makefile_test, []) +test('T26435', [only_ways(['llvm'])], warn_and_run, ['-finfo-table-map']) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/7fe84ea5c2159204bf845ff3f7fd1e65... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/7fe84ea5c2159204bf845ff3f7fd1e65... You're receiving this email because of your account on gitlab.haskell.org.