[openwrt/openwrt] tools/gnulib: add macros to skip reallocarray() functions

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/5ade7ee60ef726869d421673afc9aee97e851772

commit 5ade7ee60ef726869d421673afc9aee97e851772
Author: Michael Pratt <mcpratt at pm.me>
AuthorDate: Sat Apr 13 15:04:54 2024 -0400

    tools/gnulib: add macros to skip reallocarray() functions
    
    For modules that depend on the reallocarray module, like ialloc, xalloc,
    and safe-alloc, it was not possible to skip importing the reallocarray
    module as they all contained at least one function that called
    reallocarray() and would cause build failure if the host system didn't
    declare it.
    
    This upstreamable patch adds macros that toggle whether to define
    functions that depend on reallocarray() based on whether the reallocarray
    module is being imported.
    
    Tested-by: Georgi Valkov <gvalkov at gmail.com> # MacOS
    Signed-off-by: Michael Pratt <mcpratt at pm.me>
    Signed-off-by: Tony Ambardar <itugrok at yahoo.com>
---
 tools/gnulib/patches/160-flag-reallocarray.patch | 115 +++++++++++++++++++++++
 1 file changed, 115 insertions(+)

diff --git a/tools/gnulib/patches/160-flag-reallocarray.patch b/tools/gnulib/patches/160-flag-reallocarray.patch
new file mode 100644
index 0000000000..8ffe273e11
--- /dev/null
+++ b/tools/gnulib/patches/160-flag-reallocarray.patch
@@ -0,0 +1,115 @@
+--- a/lib/ialloc.h
++++ b/lib/ialloc.h
+@@ -106,6 +106,8 @@ icalloc (idx_t n, idx_t s)
+   return calloc (n, s);
+ }
+ 
++#if GNULIB_REALLOCARRAY
++
+ /* ireallocarray (ptr, num, size) is like reallocarray (ptr, num, size).
+    It returns a non-NULL pointer to num * size bytes of memory.
+    Upon failure, it returns NULL with errno set.  */
+@@ -131,6 +133,8 @@ ireallocarray (void *p, idx_t n, idx_t s
+     return _gl_alloc_nomem ();
+ }
+ 
++#endif /* GNULIB_REALLOCARRAY */
++
+ #ifdef __cplusplus
+ }
+ #endif
+--- a/lib/xmalloc.c
++++ b/lib/xmalloc.c
+@@ -51,12 +51,16 @@ ximalloc (idx_t s)
+   return nonnull (imalloc (s));
+ }
+ 
++#if GNULIB_REALLOCARRAY
++
+ char *
+ xcharalloc (size_t n)
+ {
+   return XNMALLOC (n, char);
+ }
+ 
++#endif /* GNULIB_REALLOCARRAY */
++
+ /* Change the size of an allocated block of memory P to S bytes,
+    with error checking.  */
+ 
+@@ -75,6 +79,8 @@ xirealloc (void *p, idx_t s)
+   return nonnull (irealloc (p, s));
+ }
+ 
++#if GNULIB_REALLOCARRAY
++
+ /* Change the size of an allocated block of memory P to an array of N
+    objects each of S bytes, with error checking.  */
+ 
+@@ -205,6 +211,8 @@ x2nrealloc (void *p, size_t *pn, size_t
+   return p;
+ }
+ 
++#endif /* GNULIB_REALLOCARRAY */
++
+ /* Grow PA, which points to an array of *PN items, and return the
+    location of the reallocated array, updating *PN to reflect its
+    new size.  The new array will contain at least N_INCR_MIN more
+--- a/lib/xalloc.h
++++ b/lib/xalloc.h
+@@ -129,6 +129,7 @@ char *xstrdup (char const *str)
+ # define XCALLOC(n, t) \
+     ((t *) (sizeof (t) == 1 ? xzalloc (n) : xcalloc (n, sizeof (t))))
+ 
++# if GNULIB_REALLOCARRAY
+ 
+ /* Allocate an array of N objects, each with S bytes of memory,
+    dynamically, with error checking.  S must be nonzero.  */
+@@ -156,6 +157,8 @@ char *xcharalloc (size_t n)
+   _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE
+   _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;
+ 
++# endif /* GNULIB_REALLOCARRAY */
++
+ #endif /* GNULIB_XALLOC */
+ 
+ 
+--- a/lib/safe-alloc.h
++++ b/lib/safe-alloc.h
+@@ -36,6 +36,8 @@ _GL_INLINE_HEADER_BEGIN
+ # define SAFE_ALLOC_INLINE _GL_INLINE
+ #endif
+ 
++#if GNULIB_REALLOCARRAY
++
+ /* Don't call these directly - use the macros below.  */
+ SAFE_ALLOC_INLINE void *
+ safe_alloc_realloc_n (void *ptr, size_t count, size_t size)
+@@ -51,6 +53,9 @@ safe_alloc_realloc_n (void *ptr, size_t
+ #endif
+   return ptr;
+ }
++
++#endif /* GNULIB_REALLOCARRAY */
++
+ _GL_ATTRIBUTE_NODISCARD SAFE_ALLOC_INLINE int
+ safe_alloc_check (void *ptr)
+ {
+@@ -84,6 +89,8 @@ safe_alloc_check (void *ptr)
+ #define ALLOC_N(ptr, count) \
+   safe_alloc_check ((ptr) = calloc (count, sizeof *(ptr)))
+ 
++#if GNULIB_REALLOCARRAY
++
+ /**
+  * ALLOC_N_UNINITIALIZED:
+  * @ptr: pointer to allocated memory
+@@ -112,6 +119,8 @@ safe_alloc_check (void *ptr)
+ #define REALLOC_N(ptr, count) \
+   safe_alloc_check ((ptr) = safe_alloc_realloc_n (ptr, count, sizeof *(ptr)))
+ 
++#endif /* GNULIB_REALLOCARRAY */
++
+ /**
+  * FREE:
+  * @ptr: pointer holding address to be freed