it finally compiles :)

.gitignore

@@ -1,3 +1,4 @@
 lib
+include
 result*
 dist-newstyle

cabal.project

@@ -4,10 +4,10 @@ packages:
 source-repository-package
     type: git
     location: https://github.com/well-typed/hs-bindgen.git
-    tag: 933d11d771ff13b6a3b851cb0ec9bc3632626f2f
+    tag: f99ed4ddfc7808b3eb28bbf089612b6a52983685
     subdir: hs-bindgen-runtime
 source-repository-package
     type: git
     location: https://github.com/well-typed/hs-bindgen.git
-    tag: 933d11d771ff13b6a3b851cb0ec9bc3632626f2f
+    tag: f99ed4ddfc7808b3eb28bbf089612b6a52983685
     subdir: c-expr-runtime

flake.lock

@@ -5,11 +5,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1763759067,
+        "lastModified": 1769996383,
-        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "narHash": "sha256-AnYjnFWgS49RlqX7LrC4uA+sCCDBj0Ry/WOJ5XWAsa0=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "rev": "57928607ea566b5db3ad13af0e57e921e6b12381",
         "type": "github"
       },
       "original": {
@@ -25,43 +25,43 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1765888948,
+        "lastModified": 1770911191,
-        "narHash": "sha256-rgGAUQVfJ0sKXm9bzh7XIJUHh/JkEsz/LX6k8aCKeD4=",
+        "narHash": "sha256-fePV3+4uHg1tQH83rUO/7gQOGexHdaxyVkO2X3HkOA0=",
         "owner": "well-typed",
         "repo": "hs-bindgen",
-        "rev": "fd74e8fa4216eccd67069ec9d8637b57000ffc83",
+        "rev": "087884c110948e7bd67bec0ae8004e5396f63241",
         "type": "github"
       },
       "original": {
         "owner": "well-typed",
         "repo": "hs-bindgen",
-        "rev": "fd74e8fa4216eccd67069ec9d8637b57000ffc83",
         "type": "github"
       }
     },
     "libclang-bindings-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1765293798,
+        "lastModified": 1770274896,
-        "narHash": "sha256-fZvyZo5emD1W5LwrIg2zTUYE9StRh3xF8TcuXjzKIAk=",
+        "narHash": "sha256-JnxJBo2L4URFD8JbpjnPG/ej/xKFe7y5ZpjnvIztwAM=",
         "owner": "well-typed",
         "repo": "libclang",
-        "rev": "b8305bd9c3e8e8f63d6f415553388be7f233ef45",
+        "rev": "155642a4a4a9f0414a058a8f08f39aa6c7bb57ed",
         "type": "github"
       },
       "original": {
         "owner": "well-typed",
         "repo": "libclang",
+        "rev": "155642a4a4a9f0414a058a8f08f39aa6c7bb57ed",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1764947035,
+        "lastModified": 1770169770,
-        "narHash": "sha256-EYHSjVM4Ox4lvCXUMiKKs2vETUSL5mx+J2FfutM7T9w=",
+        "narHash": "sha256-awR8qIwJxJJiOmcEGgP2KUqYmHG4v/z8XpL9z8FnT1A=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a672be65651c80d3f592a89b3945466584a22069",
+        "rev": "aa290c9891fa4ebe88f8889e59633d20cc06a5f2",
         "type": "github"
       },
       "original": {
@@ -73,11 +73,11 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1761765539,
+        "lastModified": 1769909678,
-        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "narHash": "sha256-cBEymOf4/o3FD5AZnzC3J9hLbiZ+QDT/KDuyHXVJOpM=",
         "owner": "nix-community",
         "repo": "nixpkgs.lib",
-        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "rev": "72716169fe93074c333e8d0173151350670b824c",
         "type": "github"
       },
       "original": {
@@ -88,11 +88,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1765772535,
+        "lastModified": 1770843696,
-        "narHash": "sha256-aq+dQoaPONOSjtFIBnAXseDm9TUhIbe215TPmkfMYww=",
+        "narHash": "sha256-LovWTGDwXhkfCOmbgLVA10bvsi/P8eDDpRudgk68HA8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "09b8fda8959d761445f12b55f380d90375a1d6bb",
+        "rev": "2343bbb58f99267223bc2aac4fc9ea301a155a16",
         "type": "github"
       },
       "original": {

flake.nix

@@ -1,7 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "nixpkgs/nixpkgs-unstable";
-    hs-bindgen.url = "github:well-typed/hs-bindgen/fd74e8fa4216eccd67069ec9d8637b57000ffc83";
+    hs-bindgen.url = "github:well-typed/hs-bindgen";
     self.submodules = true;
   };
   outputs = {
@@ -26,7 +26,9 @@
       libXi,
       xrandr,
       # shell deps
+      clang,
       hs-bindgen-cli,
+      tree,
     }:
       mkDerivation {
         pname = "hs-rgfw";
@@ -44,9 +46,9 @@
           libXi
           xrandr
         ];
-        preBuild = ''
+        preConfigure = ''
           set -x
-          export PATH=${hs-bindgen-cli}/bin:$PATH
+          export PATH=${clang}/bin:${hs-bindgen-cli}/bin:${tree}/bin:$PATH
           ./generate.sh
           set +x
         '';

generate.sh

@@ -1,8 +1,49 @@
+echo "# copying header..."
+
+mkdir -p lib/include
+cp rgfw/RGFW.h lib/include/RGFW.h
+
+echo "# creating flags for hs-bindgen-cli..."
+
+export CFLAGS=$(pkg-config --cflags x11 xcursor xrandr xi gl xrender xext xfixes)
+HBC_ARGS=""
+
+for token in $CFLAGS; do
+  case "$token" in
+    -I* ) HBC_ARGS="$HBC_ARGS $token" ;;
+    -D* ) HBC_ARGS="$HBC_ARGS --define-macro ${token#-D}" ;;
+    *   ) HBC_ARGS="$HBC_ARGS --clang-option $token" ;;
+  esac
+done
+
+echo "# creating c file from header..."
+
+# other macro definitions should be defined with ghc-options: -copt-D in *.cabal
+cat > lib/RGFW.c <<EOF
+#define RGFW_IMPLEMENTATION
+#include "RGFW.h"
+EOF
+
+echo "# generating library RGFW.Generated..."
+
+#  --unsafe _unsafe \
+#  --pointer _pointer \
+set -x
 hs-bindgen-cli preprocess \
-  -Irgfw \
+  -Ilib/include \
+  --unique-id andromeda.hs-rgfw \
   --create-output-dirs \
   --overwrite-files \
+  --single-file \
+  --safe _safe \
   --hs-output-dir lib \
   --module RGFW.Generated \
-  --clang-option=-DRGFW_OPENGL \
+  --define-macro=RGFW_OPENGL \
+  --define-macro=RGFW_EXPORT \
+  $HBC_ARGS \
   RGFW.h
+set +x
+
+echo "# generated filetree:"
+
+tree lib

hs-rgfw.cabal

@@ -12,15 +12,28 @@ common warnings
 
 library
   import: warnings
+  -- hs-bindgen-cli uses --single-file flag, so no other modules
   exposed-modules: RGFW.Generated
   build-depends:
     , base
+    , primitive
     , c-expr-runtime
     , hs-bindgen-runtime
-  include-dirs: rgfw
+  pkgconfig-depends:
+    , gl
+    , x11
+    , xcursor
+    , xrandr
+    , xi
+  include-dirs: lib/include
   hs-source-dirs: lib
   default-language: Haskell2010
   default-extensions: FlexibleInstances
+  -- options for RGFW passed here
+  ghc-options:
+    -optc-DRGFW_OPENGL
+    -optc-DRGFW_EXPORT
+  c-sources: lib/RGFW.c
 
 executable hs-rgfw
   import: warnings
@@ -36,6 +49,6 @@ executable hs-rgfw
     , xcursor
     , xrandr
     , xi
-  include-dirs: rgfw
+  include-dirs: lib/include
   hs-source-dirs: src
   default-language: Haskell2010

src/Main.hs

@@ -1,3 +1,5 @@
 module Main where
+
 main :: IO ()
-main = putStrLn "Hello World"
+main = do
+  putStrLn "Hello World"