1 files changed, 79 insertions, 0 deletions
diff --git a/gnulib-m4/random.m4 b/gnulib-m4/random.m4
new file mode 100644
index 00000000..911c5d0e
--- /dev/null
+++ b/gnulib-m4/random.m4
@@ -0,0 +1,79 @@
+# random.m4 serial 8
+dnl Copyright (C) 2012-2024 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_RANDOM],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl We can't use AC_CHECK_FUNC here, because random() is defined as a
+  dnl static inline function when compiling for Android 4.4 or older.
+  AC_CACHE_CHECK([for random], [gl_cv_func_random],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdlib.h>]],
+          [[return random() == 0;]])
+       ],
+       [gl_cv_func_random=yes],
+       [gl_cv_func_random=no])
+    ])
+  gl_CHECK_FUNCS_ANDROID([initstate], [[#include <stdlib.h>]])
+  gl_CHECK_FUNCS_ANDROID([setstate], [[#include <stdlib.h>]])
+  if test $gl_cv_func_random = no; then
+    HAVE_RANDOM=0
+    HAVE_INITSTATE=0
+    HAVE_SETSTATE=0
+  else
+    if test $ac_cv_func_initstate = no; then
+      HAVE_INITSTATE=0
+    fi
+    if test $ac_cv_func_setstate = no; then
+      HAVE_SETSTATE=0
+    fi
+  fi
+  if test $HAVE_INITSTATE = 0; then
+    case "$gl_cv_onwards_func_initstate" in
+      future*) REPLACE_INITSTATE=1 ;;
+    esac
+  fi
+  if test $HAVE_SETSTATE = 0; then
+    case "$gl_cv_onwards_func_setstate" in
+      future*) REPLACE_SETSTATE=1 ;;
+    esac
+  fi
+  dnl On several platforms, random() is not multithread-safe.
+  if test $ac_cv_func_initstate = no || test $ac_cv_func_setstate = no \
+     || case "$host_os" in \
+          darwin* | freebsd* | solaris* | cygwin* | haiku*) true ;; \
+          *) false ;; \
+        esac
+  then
+    dnl In order to define initstate or setstate, we need to define all the
+    dnl functions at once.
+    REPLACE_RANDOM=1
+    if test $ac_cv_func_initstate = yes; then
+      REPLACE_INITSTATE=1
+    fi
+    if test $ac_cv_func_setstate = yes; then
+      REPLACE_SETSTATE=1
+    fi
+  fi
+
+  AC_CHECK_DECLS_ONCE([initstate])
+  if test $ac_cv_have_decl_initstate = no; then
+    HAVE_DECL_INITSTATE=0
+  fi
+
+  AC_CHECK_DECLS_ONCE([setstate])
+  if test $ac_cv_have_decl_setstate = no; then
+    HAVE_DECL_SETSTATE=0
+  fi
+])
+
+# Prerequisites of lib/random.c.
+AC_DEFUN([gl_PREREQ_RANDOM], [
+  :
+])