Define NDEBUG in CMakeLists.txt and Makefile

This will disable the pre-condition assertions in all functions,
which should never be false for releases anyway.

CMakeLists.txt

@@ -5,8 +5,10 @@ project(zps C)
 # Target
 set(TARGET "zps")
 # Add project source
-add_executable(${TARGET} src/${TARGET}.c src/${TARGET}.h)
+add_executable(${TARGET})
+target_sources(${TARGET} PRIVATE src/${TARGET}.c src/${TARGET}.h)
 # Compile options
 target_compile_options(${TARGET} PRIVATE -s -O3 -Wall -Wextra -pedantic)
+target_compile_definitions(${TARGET} PRIVATE NDEBUG)
 # Install
 install(TARGETS ${TARGET} RUNTIME DESTINATION bin)

Makefile

@@ -1,6 +1,6 @@
 # Project and compiler information
 NAME := zps
-CFLAGS := -s -O3 -Wall -Wextra -pedantic
+CFLAGS := -s -O3 -Wall -Wextra -pedantic -DNDEBUG
 ifeq ($(CC),)
     CC := gcc
 endif