Use modified setup for building vendored libsecp256k1

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "secp256k1"]
+	path = secp256k1
+	url = https://github.com/bitcoin-core/secp256k1.git

.travis.yml

@@ -24,7 +24,7 @@ addons:
   apt:
     packages:
       - libgmp-dev
-      - libsecp256k1-dev
+      - libtool
 
 before_install:
 # Download and unpack the stack executable

Setup.hs

@@ -1,2 +1,65 @@
-import Distribution.Simple
-main = defaultMain
+import           Control.Monad
+import           Distribution.PackageDescription
+import           Distribution.Simple
+import           Distribution.Simple.LocalBuildInfo
+import           Distribution.Simple.Setup
+import           Distribution.Simple.Utils
+import           Distribution.Verbosity
+import           System.Environment
+import           System.Exit
+
+main :: IO ()
+main = defaultMainWithHooks autoconfUserHooks
+    { preConf = autogen
+    , postConf = configure
+    , preBuild = make
+    , preClean = clean
+    }
+
+runInRepo :: Verbosity
+            -> FilePath
+            -> [String]
+            -> Maybe [(String, String)]
+            -> IO ExitCode
+runInRepo v prog args envM = rawSystemIOWithEnv v
+    prog args (Just "secp256k1") envM Nothing Nothing Nothing
+
+autogen :: Args -> ConfigFlags -> IO HookedBuildInfo
+autogen _ flags = do
+    maybeExit $ runInRepo v "sh" [ "-c", "libtoolize"] Nothing
+    maybeExit $ runInRepo v "sh" ["./autogen.sh"] Nothing
+    return emptyHookedBuildInfo
+  where
+    v = fromFlag $ configVerbosity flags
+
+configure :: Args -> ConfigFlags -> PackageDescription -> LocalBuildInfo -> IO ()
+configure args flags pd lbi = do
+    (ccProg, ccFlags) <- configureCCompiler v programConfig
+    env <- getEnvironment
+    let env' = appendToEnvironment ("CFLAGS", unwords ccFlags) env
+        args' = args ++ ["--with-gcc=" ++ ccProg]
+    maybeExit $ runInRepo v "sh" args' (Just env')
+  where
+    args = "./configure" : "--enable-module-recovery" : "--enable-module-schnorrsig" : configureArgs False flags
+    v = fromFlag $ configVerbosity flags
+    appendToEnvironment (key, val) [] = [(key, val)]
+    appendToEnvironment (key, val) (kv@(k, v) : rest)
+        | key == k  = (key, v ++ " " ++ val) : rest
+        | otherwise = kv : appendToEnvironment (key, val) rest
+    programConfig = withPrograms lbi
+
+make :: Args -> BuildFlags -> IO HookedBuildInfo
+make _ flags = do
+    runInRepo v "make" ["clean"] Nothing
+    runInRepo v "make" [] Nothing
+    runInRepo v "make" ["install"] Nothing
+    return emptyHookedBuildInfo
+  where
+    v = fromFlag $ buildVerbosity flags
+
+clean :: Args -> CleanFlags -> IO HookedBuildInfo
+clean _ flags = do
+    runInRepo v "make" ["clean"] Nothing
+    return emptyHookedBuildInfo
+  where
+    v = fromFlag $ cleanVerbosity flags

libsecp256k1.cabal

@@ -1,11 +1,11 @@
-cabal-version: 1.12
+cabal-version: 1.24
 
--- This file has been generated from package.yaml by hpack version 0.34.4.
+-- This file has been generated from package.yaml by hpack version 0.35.1.
 --
 -- see: https://github.com/sol/hpack
 
 name:           libsecp256k1
-version:        0.1.0
+version:        0.2.0
 synopsis:       Bindings for secp256k1
 description:    Sign and verify signatures using the secp256k1 library.
 category:       Crypto
@@ -16,7 +16,7 @@ maintainer:     [email protected]
 copyright:      (c) 2017 Jean-Pierre Rupp; (c) 2020 Haskoin Developers; (c) 2022 Keagan McClelland
 license:        MIT
 license-file:   LICENSE
-build-type:     Simple
+build-type:     Custom
 extra-source-files:
     CHANGELOG.md
     README.md
@@ -25,6 +25,11 @@ source-repository head
   type: git
   location: https://github.com/ProofOfKeags/libsecp256k1-haskell.git
 
+custom-setup
+  setup-depends:
+      Cabal >=1.10
+    , base >=4.8 && <5
+
 library
   exposed-modules:
       Crypto.Secp256k1
@@ -35,8 +40,15 @@ library
       Paths_libsecp256k1
   hs-source-dirs:
       src
-  pkgconfig-depends:
-      libsecp256k1
+  cc-options: -DHAVE_CONFIG_H -Wno-error=deprecated-declarations
+  include-dirs:
+      secp256k1
+      secp256k1/include
+  c-sources:
+      secp256k1/src/secp256k1.c
+      secp256k1/contrib/lax_der_parsing.c
+      secp256k1/src/precomputed_ecmult.c
+      secp256k1/src/precomputed_ecmult_gen.c
   build-depends:
       base >=4.9 && <5
     , bytestring >=0.10.8 && <0.12

package.yaml

@@ -1,5 +1,5 @@
 name: libsecp256k1
-version: 0.1.0
+version: 0.2.0
 synopsis: Bindings for secp256k1
 description: Sign and verify signatures using the secp256k1 library.
 category: Crypto
@@ -10,6 +10,7 @@ license: MIT
 license-file: LICENSE
 github: ProofOfKeags/libsecp256k1-haskell.git
 homepage: http://github.com/ProofOfKeags/secp256k1-haskell#readme
+build-type: Custom
 extra-source-files:
   - CHANGELOG.md
   - README.md
@@ -22,8 +23,17 @@ dependencies:
   - transformers >= 0.4.0.0 && <1.0
 library:
   source-dirs: src
-  pkg-config-dependencies:
-    - libsecp256k1
+  cc-options:
+  - -DHAVE_CONFIG_H
+  - -Wno-error=deprecated-declarations
+  c-sources:
+  - secp256k1/src/secp256k1.c
+  - secp256k1/contrib/lax_der_parsing.c
+  - secp256k1/src/precomputed_ecmult.c
+  - secp256k1/src/precomputed_ecmult_gen.c
+  include-dirs:
+  - secp256k1
+  - secp256k1/include
 tests:
   spec:
     main: Main.hs
@@ -36,3 +46,8 @@ tests:
       - hspec
       - libsecp256k1
       - HUnit
+
+custom-setup:
+  dependencies:
+  - base >= 4.8 && < 5
+  - Cabal >= 1.10