Re: [PATCH v2 1/2] posix: Add compat glob symbol to not follow dangling symbols

[Adhemerval Zanella <adhemerval dot zanella at linaro dot org>]

On 26/09/2017 08:29, Andreas Schwab wrote:
> Current version of make won't build against this (undefined reference to
> __alloca from included glob sources).
>
> Andreas.
>
I am not very familiar of the process to incorporate gnulib code
in external projects, but I see other possible issues that would
need to be fixed as well:

  * FLEXIBLE_ARRAY_MEMBER definition for !__LIBC.
  * __glob_pattern_type duplicated prototype.
  * __set_errno and mempcpy definition.

I could build gnumake with forced internal glob implementation
(make_cv_sys_gnu_glob=no) with the patch following patch.  Looking
gnulib I am not sure if the correct way to use mempcpy for !_LIBC.

---

diff --git a/posix/glob.c b/posix/glob.c
index 98122dac88..31e3aba4dd 100644
--- a/posix/glob.c
+++ b/posix/glob.c
@@ -65,11 +65,15 @@
 # define __stat64(fname, buf)   stat (fname, buf)
 # define __fxstatat64(_, d, f, st, flag) fstatat (d, f, st, flag)
 # define struct_stat64          struct stat
-# ifndef __MVS__
-#  define __alloca              alloca
-# endif
+# define __alloca               alloca
 # define __readdir              readdir
+# define FLEXIBLE_ARRAY_MEMBER 0
 # define COMPILE_GLOB64
+static inline void *
+mempcpy (void *dest, const void *src, size_t n)
+{
+  return memcpy (dest, src, n) + n;
+}
 #endif /* _LIBC */
 
 #include <fnmatch.h>
@@ -230,8 +234,6 @@ glob_use_alloca (size_t alloca_used, size_t len)
 static int glob_in_dir (const char *pattern, const char *directory,
                        int flags, int (*errfunc) (const char *, int),
                        glob_t *pglob, size_t alloca_used);
-extern int __glob_pattern_type (const char *pattern, int quote)
-    attribute_hidden;
 
 static int prefix_array (const char *prefix, char **array, size_t n) __THROWNL;
 static int collated_compare (const void *, const void *) __THROWNL;