Replace COSMO define with _COSMO_SOURCE

This change might cause ABI breakages for /opt/cosmos. It's needed to
help us better conform to header declaration practices.

third_party/dlmalloc/dlmalloc.c

@@ -1297,29 +1297,6 @@ void* dlmemalign(size_t alignment, size_t bytes) {
   return internal_memalign(gm, alignment, bytes);
 }
 
-int dlposix_memalign(void** pp, size_t alignment, size_t bytes) {
-  void* mem = 0;
-  if (alignment == MALLOC_ALIGNMENT)
-    mem = dlmalloc(bytes);
-  else {
-    size_t d = alignment / sizeof(void*);
-    size_t r = alignment % sizeof(void*);
-    if (r != 0 || d == 0 || (d & (d-SIZE_T_ONE)) != 0)
-      return EINVAL;
-    else if (bytes <= MAX_REQUEST - alignment) {
-      if (alignment <  MIN_CHUNK_SIZE)
-        alignment = MIN_CHUNK_SIZE;
-      mem = internal_memalign(gm, alignment, bytes);
-    }
-  }
-  if (!mem) {
-    return ENOMEM;
-  } else {
-    *pp = mem;
-    return 0;
-  }
-}
-
 #if USE_LOCKS
 void dlmalloc_atfork(void) {
   bzero(&gm->mutex, sizeof(gm->mutex));

third_party/dlmalloc/dlmalloc.h

@@ -1,5 +1,30 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_DLMALLOC_DLMALLOC_H_
 #define COSMOPOLITAN_THIRD_PARTY_DLMALLOC_DLMALLOC_H_
+
+#define dlbulk_free                  __dlbulk_free
+#define dlcalloc                     __dlcalloc
+#define dlfree                       __dlfree
+#define dlindependent_calloc         __dlindependent_calloc
+#define dlindependent_comalloc       __dlindependent_comalloc
+#define dlmallinfo                   __dlmallinfo
+#define dlmalloc                     __dlmalloc
+#define dlmalloc_abort               __dlmalloc_abort
+#define dlmalloc_atfork              __dlmalloc_atfork
+#define dlmalloc_footprint           __dlmalloc_footprint
+#define dlmalloc_footprint_limit     __dlmalloc_footprint_limit
+#define dlmalloc_inspect_all         __dlmalloc_inspect_all
+#define dlmalloc_max_footprint       __dlmalloc_max_footprint
+#define dlmalloc_set_footprint_limit __dlmalloc_set_footprint_limit
+#define dlmalloc_stats               __dlmalloc_stats
+#define dlmalloc_trim                __dlmalloc_trim
+#define dlmalloc_usable_size         __dlmalloc_usable_size
+#define dlmallopt                    __dlmallopt
+#define dlmallopt                    __dlmallopt
+#define dlmemalign                   __dlmemalign
+#define dlrealloc                    __dlrealloc
+#define dlrealloc_in_place           __dlrealloc_in_place
+#define dlrealloc_in_place           __dlrealloc_in_place
+
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
@@ -88,16 +113,6 @@ void* dlrealloc_in_place(void*, size_t);
 */
 void* dlmemalign(size_t, size_t);
 
-/*
-  int posix_memalign(void** pp, size_t alignment, size_t n);
-  Allocates a chunk of n bytes, aligned in accord with the alignment
-  argument. Differs from memalign only in that it (1) assigns the
-  allocated memory to *pp rather than returning it, (2) fails and
-  returns EINVAL if the alignment is not a power of two (3) fails and
-  returns ENOMEM if memory cannot be allocated.
-*/
-int dlposix_memalign(void**, size_t, size_t);
-
 /*
   mallopt(int parameter_number, int parameter_value)
   Sets tunable parameters The format is to provide a

third_party/dlmalloc/dlmalloc_abort.greg.c

@@ -21,6 +21,7 @@
 #include "libc/log/log.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
+#include "third_party/dlmalloc/dlmalloc.h"
 
 #define MESSAGE "dlmalloc_abort()\n"