qt5base-lts/qmake/main.cpp
Thiago Macieira 36d524e6a3 moc: get the system #defines from the compiler itself
In order for moc to properly parse #ifdefs and family, we've had
QMAKE_COMPILER_DEFINES as a list of pre-defined macros from the
compiler. That list is woefully incomplete.

Instead, let's simply ask the compiler for the list. With GCC and
family, we use the -dM flag while preprocessing. With ICC on Windows,
the flag gains an extra "Q" but is otherwise the same. For MSVC, it
requires using some undocumented switches and parsing environment
variables (I've tested MSVC 2012, 2013 and 2015).

The new moc option is called --include to be similar to GCC's -include
option. It does more than just parse a list of pre-defined macros and
can be used to insert any sort of code that moc needs to parse prior to
the main file.

Change-Id: I7de033f80b0e4431b7f1ffff13fca02dbb60a0a6
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
2016-07-20 02:54:03 +00:00

443 lines
15 KiB
C++

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2016 Intel Corporation.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the qmake application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "project.h"
#include "property.h"
#include "option.h"
#include "cachekeys.h"
#include "metamakefile.h"
#include <qnamespace.h>
#include <qdebug.h>
#include <qregexp.h>
#include <qdir.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef Q_OS_WIN
# include <qt_windows.h>
#endif
QT_BEGIN_NAMESPACE
#ifdef Q_OS_WIN
struct SedSubst {
QRegExp from;
QString to;
};
Q_DECLARE_TYPEINFO(SedSubst, Q_MOVABLE_TYPE);
static int doSed(int argc, char **argv)
{
QVector<SedSubst> substs;
QList<const char *> inFiles;
for (int i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-e")) {
if (++i == argc) {
fprintf(stderr, "Error: sed option -e requires an argument\n");
return 3;
}
QString cmd = QString::fromLocal8Bit(argv[i]);
for (int j = 0; j < cmd.length(); j++) {
QChar c = cmd.at(j);
if (c.isSpace())
continue;
if (c != QLatin1Char('s')) {
fprintf(stderr, "Error: unrecognized sed command '%c'\n", c.toLatin1());
return 3;
}
QChar sep = ++j < cmd.length() ? cmd.at(j) : QChar();
Qt::CaseSensitivity matchcase = Qt::CaseSensitive;
bool escaped = false;
int phase = 1;
QStringList phases;
QString curr;
while (++j < cmd.length()) {
c = cmd.at(j);
if (!escaped) {
if (c == QLatin1Char(';'))
break;
if (c == QLatin1Char('\\')) {
escaped = true;
continue;
}
if (c == sep) {
phase++;
phases << curr;
curr.clear();
continue;
}
}
if (phase == 1
&& (c == QLatin1Char('+') || c == QLatin1Char('?') || c == QLatin1Char('|')
|| c == QLatin1Char('{') || c == QLatin1Char('}')
|| c == QLatin1Char('(') || c == QLatin1Char(')'))) {
// translate sed rx to QRegExp
escaped ^= 1;
}
if (escaped) {
escaped = false;
curr += QLatin1Char('\\');
}
curr += c;
}
if (escaped) {
fprintf(stderr, "Error: unterminated escape sequence in sed s command\n");
return 3;
}
if (phase != 3) {
fprintf(stderr, "Error: sed s command requires three arguments (%d, %c, %s)\n", phase, sep.toLatin1(), qPrintable(curr));
return 3;
}
if (curr.contains(QLatin1Char('i'))) {
curr.remove(QLatin1Char('i'));
matchcase = Qt::CaseInsensitive;
}
if (curr != QLatin1String("g")) {
fprintf(stderr, "Error: sed s command supports only g & i options; g is required\n");
return 3;
}
SedSubst subst;
subst.from = QRegExp(phases.at(0), matchcase);
subst.to = phases.at(1);
subst.to.replace(QLatin1String("\\\\"), QLatin1String("\\")); // QString::replace(rx, sub) groks \1, but not \\.
substs << subst;
}
} else if (argv[i][0] == '-' && argv[i][1] != 0) {
fprintf(stderr, "Error: unrecognized sed option '%s'\n", argv[i]);
return 3;
} else {
inFiles << argv[i];
}
}
if (inFiles.isEmpty())
inFiles << "-";
for (const char *inFile : qAsConst(inFiles)) {
FILE *f;
if (!strcmp(inFile, "-")) {
f = stdin;
} else if (!(f = fopen(inFile, "r"))) {
perror(inFile);
return 1;
}
QTextStream is(f);
while (!is.atEnd()) {
QString line = is.readLine();
for (int i = 0; i < substs.size(); i++)
line.replace(substs.at(i).from, substs.at(i).to);
puts(qPrintable(line));
}
if (f != stdin)
fclose(f);
}
return 0;
}
static int doLink(int argc, char **argv)
{
bool isSymlink = false;
bool force = false;
QList<const char *> inFiles;
for (int i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-s")) {
isSymlink = true;
} else if (!strcmp(argv[i], "-f")) {
force = true;
} else if (argv[i][0] == '-') {
fprintf(stderr, "Error: unrecognized ln option '%s'\n", argv[i]);
return 3;
} else {
inFiles << argv[i];
}
}
if (inFiles.size() != 2) {
fprintf(stderr, "Error: this ln requires exactly two file arguments\n");
return 3;
}
if (!isSymlink) {
fprintf(stderr, "Error: this ln supports faking symlinks only\n");
return 3;
}
QString target = QString::fromLocal8Bit(inFiles[0]);
QString linkname = QString::fromLocal8Bit(inFiles[1]);
QDir destdir;
QFileInfo tfi(target);
QFileInfo lfi(linkname);
if (lfi.isDir()) {
destdir.setPath(linkname);
lfi.setFile(destdir, tfi.fileName());
} else {
destdir.setPath(lfi.path());
}
if (!destdir.exists()) {
fprintf(stderr, "Error: destination directory %s does not exist\n", qPrintable(destdir.path()));
return 1;
}
tfi.setFile(destdir.absoluteFilePath(tfi.filePath()));
if (!tfi.exists()) {
fprintf(stderr, "Error: this ln does not support symlinking non-existing targets\n");
return 3;
}
if (tfi.isDir()) {
fprintf(stderr, "Error: this ln does not support symlinking directories\n");
return 3;
}
if (lfi.exists()) {
if (!force) {
fprintf(stderr, "Error: %s exists\n", qPrintable(lfi.filePath()));
return 1;
}
if (!QFile::remove(lfi.filePath())) {
fprintf(stderr, "Error: cannot overwrite %s\n", qPrintable(lfi.filePath()));
return 1;
}
}
if (!QFile::copy(tfi.filePath(), lfi.filePath())) {
fprintf(stderr, "Error: cannot copy %s to %s\n",
qPrintable(tfi.filePath()), qPrintable(lfi.filePath()));
return 1;
}
return 0;
}
static int doInstall(int argc, char **argv)
{
if (!argc) {
fprintf(stderr, "Error: -install requires further arguments\n");
return 3;
}
if (!strcmp(argv[0], "sed"))
return doSed(argc - 1, argv + 1);
if (!strcmp(argv[0], "ln"))
return doLink(argc - 1, argv + 1);
fprintf(stderr, "Error: unrecognized -install subcommand '%s'\n", argv[0]);
return 3;
}
static int dumpMacros(const wchar_t *cmdline)
{
// from http://stackoverflow.com/questions/3665537/how-to-find-out-cl-exes-built-in-macros
int argc;
wchar_t **argv = CommandLineToArgvW(cmdline, &argc);
if (!argv)
return 2;
for (int i = 0; i < argc; ++i) {
if (argv[i][0] != L'-' || argv[i][1] != 'D')
continue;
wchar_t *value = wcschr(argv[i], L'=');
if (value) {
*value = 0;
++value;
} else {
// point to the NUL at the end, so we don't print anything
value = argv[i] + wcslen(argv[i]);
}
wprintf(L"#define %Ls %Ls\n", argv[i] + 2, value);
}
return 0;
}
#endif // Q_OS_WIN
/* This is to work around lame implementation on Darwin. It has been noted that the getpwd(3) function
is much too slow, and called much too often inside of Qt (every fileFixify). With this we use a locally
cached copy because I can control all the times it is set (because Qt never sets the pwd under me).
*/
static QString pwd;
QString qmake_getpwd()
{
if(pwd.isNull())
pwd = QDir::currentPath();
return pwd;
}
bool qmake_setpwd(const QString &p)
{
if(QDir::setCurrent(p)) {
pwd = QDir::currentPath();
return true;
}
return false;
}
int runQMake(int argc, char **argv)
{
// stderr is unbuffered by default, but stdout buffering depends on whether
// there is a terminal attached. Buffering can make output from stderr and stdout
// appear out of sync, so force stdout to be unbuffered as well.
// This is particularly important for things like QtCreator and scripted builds.
setvbuf(stdout, (char *)NULL, _IONBF, 0);
#ifdef Q_OS_WIN
// Workaround for inferior/missing command line tools on Windows: make our own!
if (argc >= 2 && !strcmp(argv[1], "-install"))
return doInstall(argc - 2, argv + 2);
{
// Support running as Visual C++'s compiler
const wchar_t *cmdline = _wgetenv(L"MSC_CMD_FLAGS");
if (!cmdline || !*cmdline)
cmdline = _wgetenv(L"MSC_IDE_FLAGS");
if (cmdline && *cmdline)
return dumpMacros(cmdline);
}
#endif
QMakeVfs vfs;
Option::vfs = &vfs;
QMakeGlobals globals;
Option::globals = &globals;
// parse command line
int ret = Option::init(argc, argv);
if(ret != Option::QMAKE_CMDLINE_SUCCESS) {
if ((ret & Option::QMAKE_CMDLINE_ERROR) != 0)
return 1;
return 0;
}
QString oldpwd = qmake_getpwd();
Option::output_dir = oldpwd; //for now this is the output dir
if(Option::output.fileName() != "-") {
QFileInfo fi(Option::output);
QString dir;
if(fi.isDir()) {
dir = fi.filePath();
} else {
QString tmp_dir = fi.path();
if(!tmp_dir.isEmpty() && QFile::exists(tmp_dir))
dir = tmp_dir;
}
#ifdef Q_OS_MAC
if (fi.fileName().endsWith(QLatin1String(".pbxproj"))
&& dir.endsWith(QLatin1String(".xcodeproj")))
dir += QStringLiteral("/..");
#endif
if(!dir.isNull() && dir != ".")
Option::output_dir = dir;
if (QDir::isRelativePath(Option::output_dir)) {
Option::output.setFileName(fi.fileName());
Option::output_dir.prepend(oldpwd + QLatin1Char('/'));
}
Option::output_dir = QDir::cleanPath(Option::output_dir);
}
QMakeProperty prop;
if(Option::qmake_mode == Option::QMAKE_QUERY_PROPERTY ||
Option::qmake_mode == Option::QMAKE_SET_PROPERTY ||
Option::qmake_mode == Option::QMAKE_UNSET_PROPERTY)
return prop.exec() ? 0 : 101;
globals.setQMakeProperty(&prop);
ProFileCache proFileCache;
Option::proFileCache = &proFileCache;
QMakeParser parser(&proFileCache, &vfs, &Option::evalHandler);
Option::parser = &parser;
QMakeProject project;
int exit_val = 0;
QStringList files;
if(Option::qmake_mode == Option::QMAKE_GENERATE_PROJECT)
files << "(*hack*)"; //we don't even use files, but we do the for() body once
else
files = Option::mkfile::project_files;
for(QStringList::Iterator pfile = files.begin(); pfile != files.end(); pfile++) {
if(Option::qmake_mode == Option::QMAKE_GENERATE_MAKEFILE ||
Option::qmake_mode == Option::QMAKE_GENERATE_PRL) {
QString fn = Option::normalizePath(*pfile);
if(!QFile::exists(fn)) {
fprintf(stderr, "Cannot find file: %s.\n",
QDir::toNativeSeparators(fn).toLatin1().constData());
exit_val = 2;
continue;
}
//setup pwd properly
debug_msg(1, "Resetting dir to: %s",
QDir::toNativeSeparators(oldpwd).toLatin1().constData());
qmake_setpwd(oldpwd); //reset the old pwd
int di = fn.lastIndexOf(QLatin1Char('/'));
if(di != -1) {
debug_msg(1, "Changing dir to: %s",
QDir::toNativeSeparators(fn.left(di)).toLatin1().constData());
if(!qmake_setpwd(fn.left(di)))
fprintf(stderr, "Cannot find directory: %s\n",
QDir::toNativeSeparators(fn.left(di)).toLatin1().constData());
fn = fn.right(fn.length() - di - 1);
}
Option::prepareProject(fn);
// read project..
if(!project.read(fn)) {
fprintf(stderr, "Error processing project file: %s\n",
QDir::toNativeSeparators(*pfile).toLatin1().constData());
exit_val = 3;
continue;
}
if (Option::mkfile::do_preprocess) {
project.dump();
continue; //no need to create makefile
}
}
bool success = true;
MetaMakefileGenerator *mkfile = MetaMakefileGenerator::createMetaGenerator(&project, QString(), false, &success);
if (!success)
exit_val = 3;
if (mkfile && !mkfile->write()) {
if(Option::qmake_mode == Option::QMAKE_GENERATE_PROJECT)
fprintf(stderr, "Unable to generate project file.\n");
else
fprintf(stderr, "Unable to generate makefile for: %s\n",
QDir::toNativeSeparators(*pfile).toLatin1().constData());
exit_val = 5;
}
delete mkfile;
mkfile = NULL;
}
qmakeClearCaches();
return exit_val;
}
QT_END_NAMESPACE
int main(int argc, char **argv)
{
return QT_PREPEND_NAMESPACE(runQMake)(argc, argv);
}