docs: add readme with ffigen command for compiler options

README.md

@@ -0,0 +1,7 @@
+## Development
+
+To generate bindings with ffigen use (adjust paths to yours):
+
+```bash
+dart run ffigen --compiler-opts "-I/path/to/libgit2dart/libgit2/headers/ -I/lib64/clang/12.0.1/include"
+```

libgit2/headers/git2/sys/credential.h

@@ -7,8 +7,8 @@
 #ifndef INCLUDE_sys_git_credential_h__
 #define INCLUDE_sys_git_credential_h__
 
-#include "../common.h"
-#include "../credential.h"
+#include "git2/common.h"
+#include "git2/credential.h"
 
 /**
  * @file git2/sys/cred.h

pubspec.yaml

@@ -23,7 +23,3 @@ ffigen:
   comments:
     style: any
     length: full
-  llvm-path:
-    - "/usr/lib64/libclang.so"
-  compiler-opts:
-    - "-I/lib64/clang/12.0.1/include"