Re: OT: It's never done *this* before

Mark Geisert via Cygwin-apps writes:
> In the midst of yet another long, tedious Qt5-Base build, this happened:
>
> g++ -c -fno-keep-inline-dllexport -D_GNU_SOURCE -pipe -ggdb -O2 -pipe
> -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=3
> -fstack-protector-strong --param=ssp-buffer-size=4 -Werror=return-type
> -Wno-deprecated-declarations -fno-delete-null-pointer-checks
> -ffile-prefix-map=/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/build=/usr/src/debug/qt5-base-5.15.16-1
> -ffile-prefix-map=/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16=/usr/src/debug/qt5-base-5.15.16-1
> -fno-exceptions -Wall -Wextra -D_REENTRANT -DQT_NO_LINKED_LIST
> -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG
> -DQT_GUI_LIB -DQT_CORE_LIB
> -I/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/examples/qpa/qrasterwindow
> -I. -I/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/include
> -I/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/include/QtGui
> -I../../../include -I../../../include/QtGui
> -I/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/include/QtCore
> -I../../../include/QtCore -I.moc
> -I/usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/mkspecs/cygwin-g++
> -o .obj/main.o
> /usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/examples/qpa/qrasterwindow/main.cpp
> In file included from
> /usr/src/qt5-base-5.15.16/qt5-base-5.15.16-1.x86_64/src/qtbase-everywhere-src-5.15.16/examples/qpa/qrasterwindow/main.cpp:51:
> ./QRasterWindow:1:3: error: stray â<80><98>\220â<80><99> in program
>     1 |
>     MZ<90><U+0000><U+0003><U+0000><U+0000><U+0000><U+0004><U+0000><U+0000>
> <U+0000><ff><ff><U+0000><U+0000><b8><U+0000><U+0000><U+0000><U+0000>
> <U+0000><U+0000><U+0000>@<U+0000><U+0000><U+0000><U+0000><U+0000>
> <U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000>
> <U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000>
> <U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000><U+0000>
> <U+0000><U+0000><U+0000><U+0000><80><U+0000><U+0000><U+0000><U+000E>
> <U+001F><ba><U+000E><U+0000><b4> <cd>!<b8><U+0001>L<cd>!This program
> cannot be run in DOS mode.
>       |   ^~~~
>
> And so on for another 136,454 error messages. Somehow g++ has ingested
> an executable file via #include; the leading "MZ" is evidence.
>
> Crossed-up file descriptor(s) somewhere?  Does this count as a DoS?

No, seeing that this is C++ and the include path has "." in it, I
suspect there's an executable with the same name as an "include <…>" in
the cwd.  Cygwin helpfully ignores the .exe suffix on the executable in
certain cases, why it does that here I don't know, maybe try if that
changes with an earlier Cygwin DLL?


Regards,
Achim.
-- 
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