Resolving dependencies...
Warning: lambda-bridge.cabal:17:1: Tabs used as indentation at 17:1, 18:1,
19:1, 20:1, 21:1
Configuring lambda-bridge-0.1...
Preprocessing executable 'haskell-test1' for lambda-bridge-0.1..
Building executable 'haskell-test1' for lambda-bridge-0.1..

<no location info>: warning: [GHC-32850] [-Wmissing-home-modules]
    These modules are needed for compilation but not listed in your .cabal file's other-modules for main :
        Foreign.LambdaBridge
[1 of 2] Compiling Foreign.LambdaBridge ( Foreign/LambdaBridge.hs, dist/build/haskell-test1/haskell-test1-tmp/Foreign/LambdaBridge.o )

Foreign/LambdaBridge.hs:17:1: warning: [GHC-94817] [-Wtabs]
    Tab character found here, and in 33 further locations.
    Suggested fix: Please use spaces instead.
   |
17 |         let args = "haskell-lambda-bridge" : argv
   | ^^^^^^^^
[2 of 2] Compiling Main             ( examples/haskell-test1/Main.hs, dist/build/haskell-test1/haskell-test1-tmp/Main.o )

examples/haskell-test1/Main.hs:14:1: warning: [GHC-94817] [-Wtabs]
    Tab character found here, and in six further locations.
    Suggested fix: Please use spaces instead.
   |
14 |         putStrLn "Connecting to 'cat' lambda bridge"
   | ^^^^^^^^
connect/lb_board_connect.c: In function lb_board_connect:

connect/lb_board_connect.c:95:17: error:
     error: implicit declaration of function execvP; did you mean execvp? [-Wimplicit-function-declaration]
       95 |                 execvP(driver,lb_path,argv2);
          |                 ^~~~~~
          |                 execvp
   |
95 |                 execvP(driver,lb_path,argv2);
   |                 ^
`cc' failed in phase `C Compiler'. (Exit code: 1)
Failed to install lambda-bridge-0.1
Error: cabal: Some packages failed to install:
lambda-bridge-0.1-Hu7ViROztw18tCJMxlf8ml failed during the building phase. The
exception was:
ExitFailure 1