ICQ for windows is compiled by Visual Studio and does not require any dependencies resolving. The solution file is icq.sln

ICQ for Mac is compiled by Xcode and does not require any dependencies resolving. Xcode project file is mac/ICQ/ICQ.xcodeproj

To configure Qt, we use the following command line:

./configure -static -release -confirm-license -opensource

Additionally, we patched Qt source code:

qtbase/src/gui/text/qtextengine.cpp

if (Q_LIKELY(last_cluster != cluster)) {
  g.attributes[i].clusterStart = true;

  // fix up clusters so that the cluster indices will be monotonic
  // and thus we never return out-of-order indices
  while (last_cluster++ < cluster && str_pos < item_length)
      log_clusters[str_pos++] = last_glyph_pos;
  last_glyph_pos = i + glyphs_shaped;
  last_cluster = cluster;

  // hide characters that should normally be invisible
  switch (string[item_pos + str_pos]) {
    case QChar::LineFeed:
    case 0x000c: // FormFeed
    case QChar::CarriageReturn:
    case QChar::LineSeparator:
    case QChar::ParagraphSeparator:
        g.attributes[i].dontPrint = true;
        break;
    case QChar::SoftHyphen:
        if (!actualFontEngine->symbol) {
            // U+00AD [SOFT HYPHEN] is a default ignorable codepoint,
            // so we replace its glyph and metrics with ones for
            // U+002D [HYPHEN-MINUS] and make it visible if it appears at line-break
            g.glyphs[i] = actualFontEngine->glyphIndex('-');
            if (Q_LIKELY(g.glyphs[i] != 0)) {
                 QGlyphLayout tmp = g.mid(i, 1);
                 actualFontEngine->recalcAdvances(&tmp, 0);
            }
            g.attributes[i].dontPrint = true;
        }
        break;
    default:
        break;
  }
}

*comment or remove 'case QChar::SoftHyphen:' with the body

ICQ for Linux is compiled by Qt creator or qmake, so you need to prepare Qt environment first.

Qt source code may be obtained from the official Qt website: http://download.qt.io/archive/qt/5.5/5.5.1/single/

To configure Qt, we use the following command line:

./configure -static -release -c++11 -no-opengl -no-harfbuzz \
  -no-audio-backend -system-xkbcommon-x11 -dbus-linked -no-openssl -qt-xcb \
  -confirm-license -opensource -qt-zlib -qt-libjpeg -qt-libpng

You will also require the following packages, which can be obtained via your package manager:

libfontconfig1-dev
libfreetype6-dev
libx11-dev
libxext-dev
libxfixes-dev
libxi-dev
libxrender-dev
libxcb1-dev
libx11-xcb-dev
libxcb-glx0-dev

Additionally, we patched Qt source code:

1. qtbase/src/gui/text/qtextlayout.cpp

if (lbh.currentPosition > 0 && lbh.currentPosition < end
                && attributes[lbh.currentPosition].lineBreak
                && eng->layoutData->string.at(lbh.currentPosition - 1).unicode() == QChar::SoftHyphen) {

• comment or remove code block in if construction

2. qtbase/src/gui/text/qtextengine.cpp

if (si->position + itemLength >= lineEnd
        && eng->layoutData->string.at(lineEnd - 1).unicode() == QChar::SoftHyphen)
        glyphs.attributes[glyphsEnd - 1].dontPrint = false;

• change false to true

Then build the configured Qt using the followind command lines

make
make install

Now you can use qmake from installed Qt to generate Makefiles from our .pro files.

In order to install the prepared version of Qt in Qt Creator, use official Qt manuals.

We provides two .pro files containing build configuration for the project:

• corelib/corelib/corelib.pro - core library
• gui/gui.pro - gui (executable file)

In gui.pro, you may switch between x32 and x64 architecture, as well as external and internal resources linking (CONFIG variable). You also have to provide a path to the directory, containing corelib.a file, which is obtained by building corelib.pro project (CORELIB_PATH variable).

Before building gui.pro file, you need to install libqt4-dev package and execute config_linux.sh in trunk root.

Additional library dependencies can be found in gui.pro or by following errors during the linkage process = )

The missing dependencies can be installed via your package manager.