Detect posix_fallocate at configure time

Testing feature macros is not enough for uclibc. Fixes build of the built-in
sqlite3 with uclibc <= 0.9.33.2. Later versions will have posix_fallocate().

Change-Id: I918a52777ac63624635802221effc6b86fa2269c
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Mark Brand <mabrand@mabrand.nl>

config.tests/unix/posix_fallocate/posix_fallocate.cpp

@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the config.tests of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <fcntl.h>
+
+int main(int, char **)
+{
+    return ::posix_fallocate(0, 0, 0);
+}

config.tests/unix/posix_fallocate/posix_fallocate.pro

@@ -0,0 +1,2 @@
+SOURCES = posix_fallocate.cpp
+CONFIG -= qt dylib

configure

@@ -686,6 +686,7 @@ CFG_MIPS_DSP=auto
 CFG_MIPS_DSPR2=auto
 CFG_CLOCK_GETTIME=auto
 CFG_CLOCK_MONOTONIC=auto
+CFG_POSIX_FALLOCATE=auto
 CFG_MREMAP=auto
 CFG_GETADDRINFO=auto
 CFG_IPV6IFNAME=auto
@@ -5440,6 +5441,15 @@ elif [ "$CFG_CLOCK_GETTIME" = "no" ]; then
     CFG_CLOCK_MONOTONIC=no
 fi
 
+# detect posix_fallocate
+if [ "$CFG_POSIX_FALLOCATE" = "auto" ]; then
+    if compileTest unix/posix_fallocate "posix_fallocate"; then
+        CFG_POSIX_FALLOCATE=yes
+    else
+        CFG_POSIX_FALLOCATE=no
+    fi
+fi
+
 # detect mremap
 if [ "$CFG_MREMAP" = "auto" ]; then
     if compileTest unix/mremap "mremap"; then
@@ -5764,6 +5774,9 @@ fi
 if [ "$CFG_CLOCK_MONOTONIC" = "yes" ]; then
     QT_CONFIG="$QT_CONFIG clock-monotonic"
 fi
+if [ "$CFG_POSIX_FALLOCATE" = "yes" ]; then
+    QT_CONFIG="$QT_CONFIG posix_fallocate"
+fi
 if [ "$CFG_MREMAP" = "yes" ]; then
     QT_CONFIG="$QT_CONFIG mremap"
 fi
@@ -6243,6 +6256,7 @@ QMakeVar set sql-plugins "$SQL_PLUGINS"
 [ "$CFG_GLIB" != "yes" ]     && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_GLIB"
 [ "$CFG_QGTKSTYLE" != "yes" ] && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_STYLE_GTK"
 [ "$CFG_CLOCK_MONOTONIC" = "no" ] && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_CLOCK_MONOTONIC"
+[ "$CFG_POSIX_FALLOCATE" = "no" ] && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_POSIX_FALLOCATE"
 [ "$CFG_MREMAP" = "no" ]     && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_MREMAP"
 [ "$CFG_GETADDRINFO" = "no" ]&& QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_GETADDRINFO"
 [ "$CFG_IPV6IFNAME" = "no" ] && QCONFIG_FLAGS="$QCONFIG_FLAGS QT_NO_IPV6IFNAME"

src/3rdparty/sqlite.pri

@@ -1,6 +1,7 @@
 CONFIG(release, debug|release):DEFINES *= NDEBUG
 DEFINES += SQLITE_OMIT_LOAD_EXTENSION SQLITE_OMIT_COMPLETE SQLITE_ENABLE_FTS3 SQLITE_ENABLE_FTS3_PARENTHESIS SQLITE_ENABLE_RTREE
 !contains(CONFIG, largefile):DEFINES += SQLITE_DISABLE_LFS
+contains(QT_CONFIG, posix_fallocate):DEFINES += HAVE_POSIX_FALLOCATE=1
 winrt: DEFINES += SQLITE_OS_WINRT
 INCLUDEPATH +=  $$PWD/sqlite
 SOURCES +=      $$PWD/sqlite/sqlite3.c