X-Git-Url: https://gitweb.michael.orlitzky.com/?p=apply-default-acl.git;a=blobdiff_plain;f=configure.ac;h=6de8a998cdcbe589016ed84ad265ab0b8ab696cf;hp=4f4f2da7161199ee4d851a7ee4bcef7bac92b21d;hb=74c97a249290c9e33e6f06a27f5c99fb5bce36d4;hpb=a605ae954b9b9c378d6a0b21058f4b4b410f8ab7

diff --git a/configure.ac b/configure.ac
index 4f4f2da..6de8a99 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,23 +1,56 @@
-#                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
 AC_PREREQ([2.68])
-AC_INIT([apply-default-acl], [0.0.5], [michael@orlitzky.com])
-AM_INIT_AUTOMAKE
-AC_CONFIG_SRCDIR([src/apply-default-acl.c])
+AC_INIT([apply-default-acl], [0.4.2], [michael@orlitzky.com])
+# Store build artifacts in this directory to keep the house clean.
+AC_CONFIG_AUX_DIR([build-aux])
+AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz tar-ustar])
 AC_CONFIG_FILES([Makefile src/Makefile])
+AC_CONFIG_SRCDIR([src/apply-default-acl.c])
+AC_CONFIG_MACRO_DIRS([m4])
 
 # Checks for programs.
 AC_PROG_CC
+AM_PROG_AR
 
 # Predefined header checks.
+AC_HEADER_DIRENT  # dirent.h
 AC_HEADER_STAT    # sys/stat.h
 AC_HEADER_STDBOOL # stdbool.h
-AC_HEADER_STDC    # stdlib.h string.h (implied: errno.h limits.h stdio.h)
-AC_TYPE_MODE_T
+AC_HEADER_STDC    # stdlib.h string.h (implied: errno.h stdio.h)
 
 # Check for header files not covered by the predefined macros above.
-AC_CHECK_HEADERS([ fcntl.h ftw.h getopt.h libgen.h sys/acl.h sys/libacl.h ])
-AC_CHECK_HEADERS([ sys/types.h unistd.h ])
+AC_HEADER_REQUIRE(acl/libacl.h)
+AC_HEADER_REQUIRE(fcntl.h)
+AC_HEADER_REQUIRE(getopt.h)
+AC_HEADER_REQUIRE(libgen.h)
+AC_HEADER_REQUIRE(limits.h)
+AC_HEADER_REQUIRE(linux/xattr.h)
+AC_HEADER_REQUIRE(sys/acl.h)
+AC_HEADER_REQUIRE(unistd.h)
+
+# We need openat() with O_NOFOLLOW from POSIX-2008. Without them, we
+# can't operate securely; I would rather refuse to be built.
+AC_CHECK_FUNC(openat,
+              [],
+              AC_MSG_ERROR(missing required openat function))
+AC_CHECK_DECLS([O_DIRECTORY],
+               [],
+               [AC_MSG_ERROR(missing required O_DIRECTORY flag in fcntl.h)],
+               [[#include <fcntl.h>]])
+AC_CHECK_DECLS([O_NOFOLLOW],
+               [],
+               [AC_MSG_ERROR(missing required O_NOFOLLOW flag in fcntl.h)],
+               [[#include <fcntl.h>]])
+AC_CHECK_DECLS([O_PATH],
+               [],
+               [AC_MSG_ERROR(missing required O_PATH flag in fcntl.h)],
+               [[#define _GNU_SOURCE
+	         #include <fcntl.h>]])
+
+# And check for the GNU/BSD extension asprintf(), which lets us avoid
+# praying to the PATH_MAX gods while constructing long paths.
+AC_CHECK_FUNC(asprintf,
+              [],
+              AC_MSG_ERROR(missing required asprintf function))
 
+LT_INIT
 AC_OUTPUT