New module 'pagealign_alloc'.

[gnulib.git] / m4 / pagealign_alloc.m4

diff --git a/m4/pagealign_alloc.m4 b/m4/pagealign_alloc.m4
new file mode 100644 (file)
index 0000000..2f0cac4
--- /dev/null
+++ b/m4/pagealign_alloc.m4
@@ -0,0 +1,24 @@
+# pagealign_alloc.m4 serial 1
+dnl Copyright (C) 2005 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_PAGEALIGN_ALLOC],
+[
+  dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
+  AC_REQUIRE([AC_GNU_SOURCE])
+
+  AC_LIBSOURCE([pagealign_alloc.h])
+  AC_LIBOBJ([pagealign_alloc])
+  gl_PREREQ_PAGEALIGN_ALLOC
+])
+
+# Prerequisites of lib/pagealign_alloc.c.
+AC_DEFUN([gl_PREREQ_PAGEALIGN_ALLOC],
+[
+  AC_REQUIRE([gl_FUNC_MMAP])
+  AC_REQUIRE([gl_GETPAGESIZE])
+  AC_CHECK_FUNCS_ONCE([posix_memalign])
+  AC_CHECK_HEADERS_ONCE([fcntl.h unistd.h])
+])