Initial scaffold: Makefile, stub malloc/free/realloc, test harness

Build system produces libft_malloc_$HOSTTYPE.so shared library with
Libft (NOMALLOC=1) as dependency. Stub functions print their name
and return NULL. Test runner compares system malloc vs LD_PRELOAD
output using write(2) to avoid stdio interference.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/realloc.c b/src/realloc.c
new file mode 100644
index 0000000..c0bbfed
--- /dev/null
+++ b/src/realloc.c
@@ -0,0 +1,16 @@
+/**
+ * @file   realloc.c
+ * @brief  Stub implementation of realloc.
+ */
+
+#include "libft.h"
+#include "malloc.h"
+
+void *
+realloc (void *ptr, size_t size)
+{
+  (void)ptr;
+  (void)size;
+  ft_putendl_fd ("REALLOC", 1);
+  return (NULL);
+}