diff options
Diffstat (limited to 'm4/pipe2.m4')
| -rw-r--r-- | m4/pipe2.m4 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/m4/pipe2.m4 b/m4/pipe2.m4 new file mode 100644 index 0000000..c081b44 --- /dev/null +++ b/m4/pipe2.m4 @@ -0,0 +1,18 @@ +# pipe2.m4 serial 2 +dnl Copyright (C) 2009-2018 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_PIPE2], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + + dnl Persuade glibc <unistd.h> to declare pipe2(). + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + AC_CHECK_FUNCS_ONCE([pipe2]) + if test $ac_cv_func_pipe2 != yes; then + HAVE_PIPE2=0 + fi +]) |