* gnu/packages/patches/ghc-9.2-glibc-2.33-link-order.patch: New file. * gnu/local.mk (dist_patch_DATA): Register it. * gnu/packages/haskell.scm (ghc-9.2)[origin]: Use it.
		
			
				
	
	
		
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			35 lines
		
	
	
	
		
			1.5 KiB
		
	
	
	
		
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Slightly modified version of
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https://gitlab.haskell.org/ghc/ghc/-/issues/19029#note_447989, required
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for older, buggy glibc versions < 2.34.
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diff -Naur ghc-9.2.5/compiler/GHC/Linker/Unit.hs ghc-9.2.5.patched/compiler/GHC/Linker/Unit.hs
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--- ghc-9.2.5/compiler/GHC/Linker/Unit.hs	2022-11-06 20:40:29.000000000 +0100
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+++ ghc-9.2.5.patched/compiler/GHC/Linker/Unit.hs	2023-01-15 14:52:57.511275338 +0100
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@@ -31,11 +31,26 @@
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     ps <- mayThrowUnitErr $ preloadUnitsInfo' unit_env pkgs
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     return (collectLinkOpts dflags ps)
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+fixOrderLinkOpts :: [String] -> [String]
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+fixOrderLinkOpts opts
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+  | have_bad_glibc_version -- glibc version strictly less than 2.34
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+  , let (before, rest) = break (== libc) opts
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+  , not (pthread `elem` before)
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+  , pthread `elem` rest -- optional if we know pthread is definitely present
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+  = before ++ pthread_and_deps ++ rest
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+  | otherwise
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+  = opts
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+  where
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+    pthread = "-lpthread"
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+    libc = "-lc"
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+    pthread_and_deps = [ "-lrt", pthread ] -- should depend on the environment
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+    have_bad_glibc_version = True
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+
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 collectLinkOpts :: DynFlags -> [UnitInfo] -> ([String], [String], [String])
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 collectLinkOpts dflags ps =
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     (
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         concatMap (map ("-l" ++) . unitHsLibs (ghcNameVersion dflags) (ways dflags)) ps,
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-        concatMap (map ("-l" ++) . map ST.unpack . unitExtDepLibsSys) ps,
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+        fixOrderLinkOpts $ concatMap (map ("-l" ++) . map ST.unpack . unitExtDepLibsSys) ps,
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         concatMap (map ST.unpack . unitLinkerOptions) ps
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     )
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