Fix strict warnings

CMakeLists.txt

@@ -23,7 +23,7 @@ PUBLIC
 )
 
 set_target_properties(c-vector-example PROPERTIES C_STANDARD 90)
-target_compile_options(c-vector-example PUBLIC -Wall -Wextra)
+target_compile_options(c-vector-example PUBLIC -Wall -Werror -Wextra)
 
 # ----------------------------
 
@@ -35,7 +35,7 @@ add_executable(test-c-vector
 
 add_test(NAME test-c-vector COMMAND test-c-vector)
 set_target_properties(test-c-vector PROPERTIES C_STANDARD 90)
-target_compile_options(test-c-vector PUBLIC -Wall -Wextra)
+target_compile_options(test-c-vector PUBLIC -Wall -Werror -Wextra)
 
 add_test(test_build
   "${CMAKE_COMMAND}"
@@ -69,7 +69,7 @@ add_executable(unit-tests
 
 add_test(NAME unit-tests COMMAND $<TARGET_FILE:unit-tests>)
 set_target_properties(unit-tests PROPERTIES C_STANDARD 90)
-target_compile_options(unit-tests PUBLIC -Wall -Wextra)
+target_compile_options(unit-tests PUBLIC -Wall -Werror -Wextra)
 
 add_test(unit_test_build
   "${CMAKE_COMMAND}"

cvector.h

@@ -419,7 +419,7 @@ typedef struct cvector_metadata_t {
  * @return the element at the specified position in the vector.
  */
 #define cvector_at(vec, n) \
-    ((vec) ? ((n < 0 || n >= cvector_size(vec)) ? NULL : &(vec)[n]) : NULL)
+    ((vec) ? (((int)(n) < 0 || (size_t)(n) >= cvector_size(vec)) ? NULL : &(vec)[n]) : NULL) \
 
 /**
  * @brief cvector_front - returns a reference to the first element in the vector. Unlike member cvector_begin, which returns an iterator to this same element, this function returns a direct reference.

unit-tests.c

@@ -54,7 +54,7 @@ UTEST(test, vector_at) {
 
     if (v) {
         int i = 0;
-        for (; i < cvector_size(v); i++) {
+        for (; i < (int)cvector_size(v); i++) {
             ASSERT_TRUE(*cvector_at(v, i) == i);
         }
     }