Hello list readers,
i'm a newcomer to this list. i'm Pierre, and i've been playing with mingw-w64
for the past 3 days. i have been gathering help from the original mingw project
list, the guys were very helpfull here. So now i'm facing more mingw-w64
issues, i'm subscribing to this list upon advice from one of the mingw user.
So basically, i have set up a mingw-w64 installation from SeZero prebuilt
packages and MSYS environement. This perfectly works for me for basic stuff
like compiling and linking to libraries made with mingw-w64.
However, when it comes to delay-loaded linking (And that's the only reason i
switched from mingw to mingw-w64 after dropping MSVC), i find myself stuck on
two scenarios:
1) My project builds various libraries, and i wish to delay-load them.
2) My project has to link against proprietary libraries (Canon, Epson, Panini
scanner APIs) for which i don't have source code.
i am really willing to continue using mingw-w64, so the only problems keeping
me from successfully building my project are those two described here.
For now, i first would like to solve the first case scenario. My project's
libraries export various methods, most of them being C++ (So the library
actually exports full classes definitions).
To allow delay-loading (And since i'm using Qt as my IDE, my "makefiles" are
actually Qt's .pro files), i do something like this:
# QMAKE_POST_LINK += gendef "$${MAINBINDIR}/$${TARGET}.dll" && \
# dlltool \
# --input-def "$${TARGET}.def" \
# --output-delaylib
"$${MAINBINDIR}/lib$${TARGET}.delayed.a" \
# "$${MAINBINDIR}/$${TARGET}.dll"
This extracts .def, and then creates libName.delayed.a, NAME being substitued
with the target name. These commands are issued without any errors, and the
output is good.
Here, no problem. The main binary then links against libName.delayed.a, and it
gets compiled fine. However, when trying to start the binary, it just won't.
Nothing happens at all, not even a "missing DLL" symptom break.
Is there anyone here with a clue of what i'm doing wrong? Once these problems
will be solved, i will request your kind help and knowledge again about the 2nd
case scenario, which is more of a problem but i may be able to solve it myself
if i understand what i'm doing wrong on the libraries over which i have full
control.
Thanks a lot,
Pierre.
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