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Diffstat (limited to 'm4/explicit_bzero.m4')
| -rw-r--r-- | m4/explicit_bzero.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/m4/explicit_bzero.m4 b/m4/explicit_bzero.m4 new file mode 100644 index 0000000..3b4ef8c --- /dev/null +++ b/m4/explicit_bzero.m4 @@ -0,0 +1,23 @@ +dnl Copyright 2017-2022 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_EXPLICIT_BZERO], +[ + AC_REQUIRE([gl_STRING_H_DEFAULTS]) + + dnl Persuade glibc <string.h> to declare explicit_bzero. + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + AC_CHECK_FUNCS_ONCE([explicit_bzero]) + if test $ac_cv_func_explicit_bzero = no; then + HAVE_EXPLICIT_BZERO=0 + fi +]) + +AC_DEFUN([gl_PREREQ_EXPLICIT_BZERO], +[ + AC_CHECK_FUNCS([explicit_memset]) + AC_CHECK_FUNCS_ONCE([memset_s]) +]) |