Switched to CMake for tests

Author: ankane

.github/workflows/build.yml

@@ -15,5 +15,6 @@ jobs:
           cd pgvector
           make
           sudo make install
-      - run: gcc -Wall -Wextra -Werror -I/usr/include/postgresql -o test/pq test/pq_test.c -lpq
-      - run: test/pq
+      - run: cmake -S . -B build
+      - run: cmake --build build
+      - run: build/test

.gitignore

@@ -1 +1 @@
-/test/pq
+build

CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.18)
+
+project(pgvector LANGUAGES C)
+
+option(BUILD_TESTING "" ON)
+
+if(BUILD_TESTING)
+    find_package(PostgreSQL REQUIRED)
+
+    add_executable(test test/pq_test.c)
+    target_link_libraries(test PRIVATE PostgreSQL::PostgreSQL)
+    if(NOT MSVC)
+        target_compile_options(test PRIVATE -Wall -Wextra -Wpedantic -Werror)
+    endif()
+endif()

README.md

@@ -67,6 +67,7 @@ To get started with development:
 git clone https://github.com/pgvector/pgvector-c.git
 cd pgvector-c
 createdb pgvector_c_test
-gcc -Wall -Wextra -Werror -o test/pq test/pq_test.c -lpq
-test/pq
+cmake -S . -B build
+cmake --build build
+build/test
 ```