dune

(data_only_dirs vendor)

(rule
 (targets libmpg123.a dllmpg123%{ext_dll})
 (deps
  (source_tree vendor))
 (action
  (no-infer
   (progn
    (chdir
     vendor/mpg123-1.29.2
     (progn
      (bash
       "sh configure --with-pic=yes --with-audio=dummy --enable-static=yes --enable-silent-rules")
      (bash "make")
      ; MacOS X hack: make insists on creating a .dylib file but %{ext_dll}
      ; evaluates to .so on this platform, so just copy it
      (bash
       "test -e src/libmpg123/.libs/libmpg123.dylib && cp -f src/libmpg123/.libs/libmpg123.dylib src/libmpg123/.libs/libmpg123.so")))
    (copy vendor/mpg123-1.29.2/src/libmpg123/.libs/libmpg123.a libmpg123.a)
    (copy
     vendor/mpg123-1.29.2/src/libmpg123/.libs/libmpg123%{ext_dll}
     dllmpg123%{ext_dll})))))

(library
 (name mpg123)
 (public_name mpg123)
 (flags
  (:standard -w -9-27))
 (foreign_archives mpg123)
 (ctypes
  (external_library_name mpg123)
  (build_flags_resolver
   (vendored
    (c_flags
     (-fPIC -I vendor/mpg123-1.29.2/src/libmpg123/))
    (c_library_flags ())))
  (headers
   (include "mpg123.h"))
  (type_description
   (instance Types)
   (functor Type_description))
  (function_description
   (concurrency unlocked)
   (instance Functions)
   (functor Function_description))
  (generated_types Types_generated)
  (generated_entry_point C))
 (inline_tests)
 (preprocess
  (pps ppx_inline_test)))