Merge pull request #73 from http4s/71-refactor-glue-code-to-avoid-requiring-lcurl

linking does not require explicit -lcurl anymore

Author: hnaderi

build.sbt

@@ -21,7 +21,7 @@ ThisBuild / nativeConfig ~= { c =>
       .withLinkingOptions(c.linkingOptions :+ s"-L${vcpkgBaseDir}/installed/x64-windows/lib/")
   } else c
 
-  platformOptions.withLinkingOptions(platformOptions.linkingOptions :+ "-lcurl")
+  platformOptions
 }
 
 ThisBuild / envVars ++= {

curl/src/main/resources/scala-native/curl.c

@@ -14,12 +14,17 @@ CURLcode org_http4s_curl_CURLMsg_data_result(CURLMsg *curlMsg) {
   return curlMsg->data.result;
 }
 
-const char * const * org_http4s_curl_get_protocols(){
-  return curl_version_info(CURLVERSION_NOW) -> protocols;
+const char * const * org_http4s_curl_get_protocols(curl_version_info_data *data){
+  return data -> protocols;
 }
 
-unsigned int org_http4s_curl_get_version_num(){
-  return curl_version_info(CURLVERSION_NOW) -> version_num;
+unsigned int org_http4s_curl_get_version_num(curl_version_info_data *data){
+  return data -> version_num;
+}
+
+CURLversion org_http4s_curl_version_now(){
+  // This is the minimum version we need currently
+  return CURLVERSION_FIRST;
 }
 
 #endif // has_include

curl/src/main/scala/org/http4s/curl/unsafe/CurlRuntime.scala

@@ -61,10 +61,12 @@ object CurlRuntime {
 
   def curlVersion: String = fromCString(libcurl.curl_version())
 
+  private lazy val versionData = libcurl.curl_version_info(libcurl.CURLVERSION_NOW())
+
   /** curl version number encoded as hex 0xXXYYZZ
     * see here https://everything.curl.dev/libcurl/api
     */
-  def curlVersionNumber: Int = libcurl.curl_version_number()
+  def curlVersionNumber: Int = libcurl.curl_version_number(versionData)
 
   /** curl version number (major, minor, patch) */
   def curlVersionTriple: (Int, Int, Int) = (
@@ -76,7 +78,7 @@ object CurlRuntime {
   def protocols: List[String] = {
 
     val all: ListBuffer[String] = ListBuffer.empty
-    var cur: Ptr[CString] = libcurl.curl_protocols_info()
+    var cur: Ptr[CString] = libcurl.curl_protocols_info(versionData)
     while ((!cur).toLong != 0) {
       all.addOne(fromCString(!cur).toLowerCase)
       cur = cur + 1

curl/src/main/scala/org/http4s/curl/unsafe/libcurl.scala

@@ -100,8 +100,12 @@ private[curl] object libcurl {
 
   type CURLoption = CUnsignedInt
 
+  type CURLversion = CUnsignedInt
+
   type curl_slist
 
+  type curl_version_info_data
+
   type header_callback = CFuncPtr4[Ptr[CChar], CSize, CSize, Ptr[Byte], CSize]
 
   type write_callback = CFuncPtr4[Ptr[CChar], CSize, CSize, Ptr[Byte], CSize]
@@ -112,6 +116,8 @@ private[curl] object libcurl {
 
   def curl_version(): Ptr[CChar] = extern
 
+  def curl_version_info(age: CURLversion): Ptr[curl_version_info_data] = extern
+
   def curl_global_init(flags: CLongInt): CURLcode = extern
 
   def curl_global_cleanup(): Unit = extern
@@ -143,10 +149,13 @@ private[curl] object libcurl {
   def curl_CURLMsg_data_result(curlMsg: Ptr[CURLMsg]): CURLcode = extern
 
   @name("org_http4s_curl_get_protocols")
-  def curl_protocols_info(): Ptr[CString] = extern
+  def curl_protocols_info(data: Ptr[curl_version_info_data]): Ptr[CString] = extern
 
   @name("org_http4s_curl_get_version_num")
-  def curl_version_number(): CInt = extern
+  def curl_version_number(data: Ptr[curl_version_info_data]): CInt = extern
+
+  @name("org_http4s_curl_version_now")
+  def CURLVERSION_NOW(): CURLversion = extern
 
   def curl_multi_add_handle(multi_handle: Ptr[CURLM], curl_handle: Ptr[CURL]): CURLMcode = extern