configure.ac

   1 AC_PREREQ([2.68])
   2 AC_INIT([apply-default-acl], [0.4.2], [michael@orlitzky.com])
   3 # Store build artifacts in this directory to keep the house clean.
   4 AC_CONFIG_AUX_DIR([build-aux])
   5 AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz tar-ustar])
   6 AC_CONFIG_FILES([Makefile src/Makefile])
   7 AC_CONFIG_SRCDIR([src/apply-default-acl.c])
   8 AC_CONFIG_MACRO_DIRS([m4])
   9
  10 # Checks for programs.
  11 AC_PROG_CC
  12 AM_PROG_AR
  13
  14 # Predefined header checks.
  15 AC_HEADER_DIRENT  # dirent.h
  16 AC_HEADER_STAT    # sys/stat.h
  17 AC_HEADER_STDBOOL # stdbool.h
  18 AC_HEADER_STDC    # stdlib.h string.h (implied: errno.h stdio.h)
  19
  20 # Check for header files not covered by the predefined macros above.
  21 AC_HEADER_REQUIRE(acl/libacl.h)
  22 AC_HEADER_REQUIRE(fcntl.h)
  23 AC_HEADER_REQUIRE(getopt.h)
  24 AC_HEADER_REQUIRE(libgen.h)
  25 AC_HEADER_REQUIRE(limits.h)
  26 AC_HEADER_REQUIRE(linux/xattr.h)
  27 AC_HEADER_REQUIRE(sys/acl.h)
  28 AC_HEADER_REQUIRE(unistd.h)
  29
  30 # We need openat() with O_NOFOLLOW from POSIX-2008. Without them, we
  31 # can't operate securely; I would rather refuse to be built.
  32 AC_CHECK_FUNC(openat,
  33               [],
  34               AC_MSG_ERROR(missing required openat function))
  35 AC_CHECK_DECLS([O_DIRECTORY],
  36                [],
  37                [AC_MSG_ERROR(missing required O_DIRECTORY flag in fcntl.h)],
  38                [[#include <fcntl.h>]])
  39 AC_CHECK_DECLS([O_NOFOLLOW],
  40                [],
  41                [AC_MSG_ERROR(missing required O_NOFOLLOW flag in fcntl.h)],
  42                [[#include <fcntl.h>]])
  43 AC_CHECK_DECLS([O_PATH],
  44                [],
  45                [AC_MSG_ERROR(missing required O_PATH flag in fcntl.h)],
  46                [[#define _GNU_SOURCE
  47                  #include <fcntl.h>]])
  48
  49 # And check for the GNU/BSD extension asprintf(), which lets us avoid
  50 # praying to the PATH_MAX gods while constructing long paths.
  51 AC_CHECK_FUNC(asprintf,
  52               [],
  53               AC_MSG_ERROR(missing required asprintf function))
  54
  55 LT_INIT
  56 AC_OUTPUT