Fails to build with -DWITH_TESTS=on and without custom allocator

[panlinux]

When building with tests enabled and without the custom allocator, the build fails. There are two classes of failure:
a)

[ 61%] Building C object test/CMakeFiles/memory_allocation_test.dir/memory_allocation_test.c.o
/home/ubuntu/git/packages/libcbor/libcbor/test/memory_allocation_test.c: In function ‘main’:
/home/ubuntu/git/packages/libcbor/libcbor/test/memory_allocation_test.c:278:37: warning: ISO C forbids empty initializer braces [-Wpedantic]
  278 |   const struct CMUnitTest tests[] = {};
      |                                     ^
/home/ubuntu/git/packages/libcbor/libcbor/test/memory_allocation_test.c:278:27: error: zero or negative size array ‘tests’
  278 |   const struct CMUnitTest tests[] = {};
      |                           ^~~~~

and

b)

/home/ubuntu/git/packages/libcbor/libcbor/test/memory_allocation_test.c:238:13: warning: ‘test_map_add’ defined but not used [-Wunused-function]
  238 | static void test_map_add(void **state) {
      |             ^~~~~~~~~~~~

The memory_allocation_test.c code tries to cope with CBOR_CUSTOM_ALLOC being unset, but the gcc warnings (treated as errors) trip it.

I think this test file should be removed from the list when CBOR_CUSTOM_ALLOC is false or undefined.

[panlinux]

How about this to skip that test entirely if CBOR_CUSTOM_ALLOC is not defined?

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index b4cea8c..70ba2e0 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,4 +1,7 @@
 file(GLOB TESTS "*_test.c")
+if(NOT CBOR_CUSTOM_ALLOC)
+    list(REMOVE_ITEM TESTS ${CMAKE_CURRENT_SOURCE_DIR}/memory_allocation_test.c)
+endif(NOT CBOR_CUSTOM_ALLOC)
 
 find_package(CMocka REQUIRED)
 

[PJK]

LGTM, thanks @panlinux !