[Fontconfig] QT4.3 application crash in fontconfig 2.2.3 on Solaris

[Henk Jan Priester]

My QT application crashes on Solaris 10 in the fontconfig library:

[1] FcPatternFindElt(0xf0ce78, 0xff154c40, 0x0, 0x2, 0xffbfa9b0,
 0x414e4753), at 0xff14607
[2] FcFontSetMatch(0xffbfaa78, 0xffbfa918, 0xffbfa928, 0x1086598,
 0xe9fd88, 0xff166000), at 0xff14112c
[3] FcFontMatch(0xe2c500, 0x1086598, 0xffbfab0c, 0xff1327bc, 0x0,
 0xff166000), at 0xff141d40
[4] tryPatternLoad(0x111a4e0, 0x0, 0xffbfac60, 0x0, 0x42a,
 0x1086598), at 0x5bbec0
[5] loadFc(0x122b098, 0x0, 0xffbfac60, 0x5c400, 0x1, 0x80000000),
 at 0x5bc2bc
[6] QFontDatabase::load(0x122b098, 0x0, 0x0, 0x19800, 0xffbfac38,
 0xffbfac60), at 0x5bd9cc
[7] QFontMetricsF::boundingRect(0xffbfae88, 0x122b098, 0x0,
 0xcd4988,

The fontconfig version is 2.2.3 according to /usr/include/fontconfig

I want to try if Fontconfig 2.4.2 solves the problem.
The INSTALL file suggest:
      ./configure --sysconfdir=/etc --prefix=/usr --mandir=/usr/share/man

Is this correct for Solaris 10 or do I need to use other options as well?

Henk Jan