buld-sys: simplify configure script; drop unused checks.

With this change, configure is updated to a more modern syntax, a number of
tests possibly introduced by autoscan are dropped (as the code never makes
use of those), and comments are changed with dnl's so that they are not
copied in the final output.

diff --git a/configure.ac b/configure.ac
index 38f903e..fda6483 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,23 +1,23 @@
-# -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
-# This file is part of libatasmart.
-#
-# Copyright 2008 Lennart Poettering
-#
-# libatasmart is free software; you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License as
-# published by the Free Software Foundation, either version 2.1 of the
-# License, or (at your option) any later version.
-#
-# libatasmart is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with libatasmart. If not, If not, see
-# <http://www.gnu.org/licenses/>.
+dnl -*- Autoconf -*-
+dnl Process this file with autoconf to produce a configure script.
+
+dnl This file is part of libatasmart.
+dnl
+dnl Copyright 2008 Lennart Poettering
+dnl
+dnl libatasmart is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU Lesser General Public License as
+dnl published by the Free Software Foundation, either version 2.1 of the
+dnl License, or (at your option) any later version.
+dnl
+dnl libatasmart is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with libatasmart. If not, If not, see
+dnl <http://www.gnu.org/licenses/>.
 
 AC_PREREQ(2.63)
 
@@ -32,8 +32,6 @@ AC_SUBST(PACKAGE_URL, [http://git.0pointer.de/?p=libatasmart.git])
 
 AC_SUBST(LIBATASMART_VERSION_INFO, [4:3:0])
 
-AC_CANONICAL_HOST
-
 AM_SILENT_RULES([yes])
 
 if type -p stow > /dev/null && test -d /usr/local/stow ; then
@@ -41,61 +39,25 @@ if type -p stow > /dev/null && test -d /usr/local/stow ; then
    ac_default_prefix="/usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION}"
 fi
 
-#### Checks for programs. ####
-
-# CC
-
 AC_PROG_CC
 AC_PROG_CC_C99
 AM_PROG_CC_C_O
 AC_PROG_GCC_TRADITIONAL
 AX_CC_FOR_BUILD
-AC_USE_SYSTEM_EXTENSIONS
 
-# C++
+AC_USE_SYSTEM_EXTENSIONS
+AC_SYS_LARGEFILE
 
-AC_PROG_CXX
+AC_PROG_LIBTOOL
 
 dnl Check compiler flags
 CC_CHECK_CFLAGS_APPEND([-Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-statement -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter -ffast-math])
 
-#### libtool stuff ####
-
-AC_PROG_LIBTOOL
-
-#### Checks for header files. ####
-
-# ISO
-AC_HEADER_STDC
-
-# XPG4-UNIX
-AC_CHECK_HEADERS([sys/poll.h])
-
-# Other
-AC_CHECK_HEADERS([sys/ioctl.h])
-AC_CHECK_HEADERS([byteswap.h])
-
-#### Typdefs, structures, etc. ####
-
-AC_C_CONST
-AC_C_BIGENDIAN
-AC_TYPE_PID_T
-AC_TYPE_SIZE_T
-AC_CHECK_TYPES(ssize_t, , [AC_DEFINE([ssize_t], [signed long],
-    [Define ssize_t if it is not done by the standard libs.])])
-AC_TYPE_OFF_T
-AC_TYPE_SIGNAL
-AC_TYPE_UID_T
-
-#### Large File-Support (LFS) ####
-
-AC_SYS_LARGEFILE
-
 PKG_CHECK_MODULES([LIBUDEV], [libudev >= 143])
 
-###################################
-#            Output               #
-###################################
+dnl###################################
+dnl#            Output               #
+dnl###################################
 
 AC_CONFIG_FILES([
 Makefile