Append paths in global config to progdb in configureCompiler

Author: jasagredo

cabal-install/src/Distribution/Client/ProjectPlanning.hs

@@ -476,6 +476,7 @@ configureCompiler
         { projectConfigHcFlavor
         , projectConfigHcPath
         , projectConfigHcPkg
+        , projectConfigProgPathExtra
         }
     , projectConfigLocalPackages =
       PackageConfig
@@ -500,24 +501,26 @@ configureCompiler
       $ do
         liftIO $ info verbosity "Compiler settings changed, reconfiguring..."
         let extraPath = fromNubList packageConfigProgramPathExtra
+        -- Add paths in the local config
         progdb <- liftIO $ prependProgramSearchPath verbosity extraPath [] defaultProgramDb
-        let progdb' = userSpecifyPaths (Map.toList (getMapLast packageConfigProgramPaths)) progdb
-        result@(_, _, progdb'') <-
+        -- Add paths in the global config
+        progdb' <- liftIO $ prependProgramSearchPath verbosity (fromNubList projectConfigProgPathExtra) [] progdb
+        let progdb'' = userSpecifyPaths (Map.toList (getMapLast packageConfigProgramPaths)) progdb'
+        result@(_, _, progdb''') <-
           liftIO $
             Cabal.configCompilerEx
               hcFlavor
               hcPath
               hcPkg
-              progdb'
+              progdb''
               verbosity
-
         -- Note that we added the user-supplied program locations and args
         -- for /all/ programs, not just those for the compiler prog and
         -- compiler-related utils. In principle we don't know which programs
         -- the compiler will configure (and it does vary between compilers).
         -- We do know however that the compiler will only configure the
         -- programs it cares about, and those are the ones we monitor here.
-        monitorFiles (programsMonitorFiles progdb'')
+        monitorFiles (programsMonitorFiles progdb''')
 
         -- Note: There is currently a bug here: we are dropping unconfigured
         -- programs from the 'ProgramDb' when we re-use the cache created by

changelog.d/pr-10790

@@ -0,0 +1,11 @@
+synopsis: Prepend the global extra paths to the `ProgramDb` sooner
+packages: cabal-install
+prs: #10790
+issues: #9800
+significance: significant
+
+description: {
+
+- The initial configuration of programs was done without the `extra-prog-path` from the global cabal configuration. This meant that in some cases, some executables were not found. In particular this manifested as Windows users who didn't add the MSYS2 paths to the global PATH couldn't make use of `pkg-config`.
+
+}