ad ca info version check

build.zig

@@ -74,15 +74,14 @@ fn addExample(
         .optimize = optimize,
         .link_libc = true,
     });
-
     b.installArtifact(exe);
+
     exe.root_module.addImport(MODULE_NAME, curl_module);
     if (libcurl) |lib| {
         exe.linkLibrary(lib);
     } else {
         exe.linkSystemLibrary("curl");
     }
-    exe.linkLibC();
 
     const run_step = b.step(
         "run-" ++ name,

examples/multi.zig

@@ -10,28 +10,18 @@ const c = curl.libcurl;
 pub fn main() !void {
     const allocator = std.heap.page_allocator;
 
-    const ca_bundle = try curl.allocCABundle(allocator);
-    defer ca_bundle.deinit();
-    const easy = try Easy.init(allocator, .{
-        .ca_bundle = ca_bundle,
-    });
-    try easy.setUrl("http://httpbin.org/headers");
-    defer easy.deinit();
-
-    const easy2 = try Easy.init(allocator, .{
-        .ca_bundle = ca_bundle,
-    });
-    try easy2.setUrl("http://httpbin.org/ip");
-    defer easy2.deinit();
-
     const multi = try Multi.init();
     defer multi.deinit();
 
+    const easy = try Easy.init(allocator, .{});
+    try easy.setUrl("http://httpbin.org/headers");
     try multi.addHandle(easy);
+
+    const easy2 = try Easy.init(allocator, .{});
+    try easy2.setUrl("http://httpbin.org/ip");
     try multi.addHandle(easy2);
 
     var running = true;
-
     while (running) {
         const transfer = try multi.perform();
         running = transfer != 0;

src/Easy.zig

@@ -347,6 +347,10 @@ pub fn bufferWriteCallback(ptr: [*c]c_char, size: c_uint, nmemb: c_uint, user_da
 
 pub fn setCommonOpts(self: Self) !void {
     if (self.ca_bundle) |bundle| {
+        // https://curl.se/libcurl/c/CURLOPT_CAINFO_BLOB.html
+        if (!c.CURL_AT_LEAST_VERSION(7, 81, 0)) {
+            return error.NoCaInfoBlobSupport;
+        }
         const blob = c.curl_blob{
             .data = @constCast(bundle.items.ptr),
             .len = bundle.items.len,