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  1. Qt
  2. QTBUG-35301

qt's zlib clash with system's zlib

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • None
    • 5.2.0 RC1
    • Build System
    • None
    • c8a8e0fb18c7c7cb6cf445dc9595eaf69f3cd126

    Description

      qt builds its own zlib by prefixing z_ to its symbols via Z_PREFIX. this works for all symbols, except for z_errmsg, which can therefore cause a duplicate definition when an application is statically linked with both qt and zlib.

      this can be fixed by this patch:

      --- a/qtbase/src/3rdparty/zlib/zconf.h
+++ b/qtbase/src/3rdparty/zlib/zconf.h
@@ -107,6 +107,7 @@
 #  define zcfree                z_zcfree
 #  define zlibCompileFlags      z_zlibCompileFlags
 #  define zlibVersion           z_zlibVersion
+#  define z_errmsg              z_z_errmsg

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            timblechmann tim blechmann
            timblechmann tim blechmann
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