X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=configure.ac;h=c16c0d78f1228e6d600080d19f4eec0177bd4c50;hb=09fd7a1e32362e536f282f30c2ad0b098fd60197;hp=2df766b6a77383d45bf588f811a0387c5641d8f7;hpb=d89f22c28473cd2e201500af0f970478105c632a;p=apply-default-acl.git

diff --git a/configure.ac b/configure.ac
index 2df766b..c16c0d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,21 +1,53 @@
-#                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
 AC_PREREQ([2.68])
-AC_INIT([apply-default-acl], [0.0.3], [michael@orlitzky.com])
-AM_INIT_AUTOMAKE
-AC_CONFIG_SRCDIR([src/apply-default-acl.c])
+AC_INIT([apply-default-acl], [0.4.0], [michael@orlitzky.com])
+AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz])
 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)
 
-# Checks for header files.
-AC_CHECK_HEADERS([limits.h stdlib.h string.h sys/acl.h unistd.h])
+# Check for header files not covered by the predefined macros above.
+AC_HEADER_REQUIRE(acl/libacl.h)
+AC_HEADER_REQUIRE(fcntl.h)
+AC_HEADER_REQUIRE(getopt.h)
+AC_HEADER_REQUIRE(libgen.h)
+AC_HEADER_REQUIRE(linux/xattr.h)
+AC_HEADER_REQUIRE(sys/acl.h)
+AC_HEADER_REQUIRE(unistd.h)
 
-# Checks for typedefs, structures, and compiler characteristics.
-AC_HEADER_STDBOOL
-AC_TYPE_MODE_T
+# 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