Switched to zig build

Author: ankane

.github/workflows/build.yml

@@ -16,4 +16,5 @@ jobs:
           cd pgvector
           make
           sudo make install
-      - run: zig run example.zig -I/usr/include/postgresql -lc -lpq
+      - run: zig build
+      - run: zig-out/bin/example

.gitignore

@@ -1,2 +1,2 @@
-/example
-*.o
+/.zig-cache
+/zig-out

README.md

@@ -75,11 +75,12 @@ To get started with development:
 git clone https://github.com/pgvector/pgvector-zig.git
 cd pgvector-zig
 createdb pgvector_zig_test
-zig run example.zig -lc -lpq
+zig build
+zig-out/bin/example
 ```
 
 Specify the path to libpq if needed:
 
 ```sh
-zig run example.zig -I/opt/homebrew/opt/libpq/include -L/opt/homebrew/opt/libpq/lib -lc -lpq
+zig build --search-prefix /opt/homebrew/opt/libpq
 ```

build.zig

@@ -0,0 +1,14 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const exe = b.addExecutable(.{
+        .name = "example",
+        .root_source_file = b.path("example.zig"),
+        .target = b.graph.host,
+    });
+
+    exe.linkSystemLibrary("pq");
+    exe.linkLibC();
+
+    b.installArtifact(exe);
+}