configure.ac

   1 AC_PREREQ([2.68])
   2 AC_INIT([apply-default-acl], [0.4.0], [michael@orlitzky.com])
   3 AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz])
   4 AC_CONFIG_FILES([Makefile src/Makefile])
   5 AC_CONFIG_SRCDIR([src/apply-default-acl.c])
   6 AC_CONFIG_MACRO_DIRS([m4])
   7
   8 # Checks for programs.
   9 AC_PROG_CC
  10 AM_PROG_AR
  11
  12 # Predefined header checks.
  13 AC_HEADER_DIRENT  # dirent.h
  14 AC_HEADER_STAT    # sys/stat.h
  15 AC_HEADER_STDBOOL # stdbool.h
  16 AC_HEADER_STDC    # stdlib.h string.h (implied: errno.h limits.h stdio.h)
  17
  18 # Check for header files not covered by the predefined macros above.
  19 AC_HEADER_REQUIRE(acl/libacl.h)
  20 AC_HEADER_REQUIRE(fcntl.h)
  21 AC_HEADER_REQUIRE(getopt.h)
  22 AC_HEADER_REQUIRE(libgen.h)
  23 AC_HEADER_REQUIRE(linux/xattr.h)
  24 AC_HEADER_REQUIRE(sys/acl.h)
  25 AC_HEADER_REQUIRE(unistd.h)
  26
  27 # We need openat() with O_NOFOLLOW from POSIX-2008. Without them, we
  28 # can't operate securely; I would rather refuse to be built.
  29 AC_CHECK_FUNC(openat,
  30               [],
  31               AC_MSG_ERROR(missing required openat function))
  32 AC_CHECK_DECLS([O_DIRECTORY],
  33                [],
  34                [AC_MSG_ERROR(missing required O_DIRECTORY flag in fcntl.h)],
  35                [[#include <fcntl.h>]])
  36 AC_CHECK_DECLS([O_NOFOLLOW],
  37                [],
  38                [AC_MSG_ERROR(missing required O_NOFOLLOW flag in fcntl.h)],
  39                [[#include <fcntl.h>]])
  40 AC_CHECK_DECLS([O_PATH],
  41                [],
  42                [AC_MSG_ERROR(missing required O_PATH flag in fcntl.h)],
  43                [[#define _GNU_SOURCE
  44                  #include <fcntl.h>]])
  45
  46 # And check for the GNU/BSD extension asprintf(), which lets us avoid
  47 # praying to the PATH_MAX gods while constructing long paths.
  48 AC_CHECK_FUNC(asprintf,
  49               [],
  50               AC_MSG_ERROR(missing required asprintf function))
  51
  52 LT_INIT
  53 AC_OUTPUT