m4/secure_getenv.m4

   1 # Look up an environment variable more securely.
   2 dnl Copyright 2013-2014 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FUNC_SECURE_GETENV],
   8 [
   9   dnl Persuade glibc <stdlib.h> to declare secure_getenv().
  10   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  11
  12   AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
  13   AC_CHECK_FUNCS_ONCE([secure_getenv])
  14   if test $ac_cv_func_secure_getenv = no; then
  15     HAVE_SECURE_GETENV=0
  16   fi
  17 ])
  18
  19 # Prerequisites of lib/secure_getenv.c.
  20 AC_DEFUN([gl_PREREQ_SECURE_GETENV], [
  21   AC_CHECK_FUNCS([__secure_getenv])
  22   if test $ac_cv_func___secure_getenv = no; then
  23     AC_CHECK_FUNCS([issetugid])
  24   fi
  25 ])