1 files changed, 20 insertions, 2 deletions
diff --git a/libpanto/build.zig b/libpanto/build.zig
index b70ae7b..973c75b 100644
--- a/libpanto/build.zig
+++ b/libpanto/build.zig
@@ -4,19 +4,26 @@ pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
-    // Public module — other packages can import this via dependency
-    _ = b.addModule("panto", .{
+    // Public module — other packages can import this via dependency.
+    // The image module pulls in the vendored stb/jebp single-header C
+    // libraries, so the module needs libc + the C translation unit + the
+    // include path for `@cImport`.
+    const panto_mod = b.addModule("panto", .{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
         .optimize = optimize,
+        .link_libc = true,
     });
+    addImageCDeps(b, panto_mod);
 
     // Unit tests
     const test_module = b.createModule(.{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
         .optimize = optimize,
+        .link_libc = true,
     });
+    addImageCDeps(b, test_module);
 
     const unit_tests = b.addTest(.{
         .name = "panto-tests",
@@ -27,3 +34,14 @@ pub fn build(b: *std.Build) void {
     const test_step = b.step("test", "Run unit tests");
     test_step.dependOn(&run_unit_tests.step);
 }
+
+/// Wire the vendored stb/jebp single-header image libraries into `mod`:
+/// the include path for `@cImport`, and the single C translation unit
+/// that compiles their implementations. Callers must also link libc.
+fn addImageCDeps(b: *std.Build, mod: *std.Build.Module) void {
+    mod.addIncludePath(b.path("src/cdeps"));
+    mod.addCSourceFile(.{
+        .file = b.path("src/cdeps/image_impl.c"),
+        .flags = &.{ "-std=gnu99", "-O2", "-fno-sanitize=undefined" },
+    });
+}