Hello Werner,
> Note that this is a new error; it didn't happen in July 2019 (the
> last time I've tried to build ttfautohint with mxe and Qt5).
Yes. We have added 'restrict' in many places, to match the function
declarations in POSIX.
> > * Can you verify that ddlineedit.moc.cpp starts with a '#include
> > <config.h>' statement? [1]
>
> It doesn't – it is an auto-generated Qt file. However, the file starts
> with
>
> ```
> #include <memory>
> #include "ddlineedit.h"
> ...
> ```
>
> and `ddlineedit.h`'s first code lines are
>
> ```
> #ifndef DDLINEEDIT_H_
> #define DDLINEEDIT_H_
>
> #include <config.h>
> ```
That's not enough. <config.h> needs to be included before <memory>.
The Qt documentation [1] recommends a Makefile rule such as
moc $(DEFINES) $(INCPATH) -i $< -o $@
Try to change this to
moc -fconfig.h $(DEFINES) $(INCPATH) -i $< -o $@
or
{ echo '#include <config.h>'; moc $(DEFINES) $(INCPATH) -i $< ; } >
$@.tmp
mv $@.tmp $@
> > * Can you show the block of preprocessor statements in <config.h> that
> > defines 'restrict'?
>
> ```
> /* Define to the equivalent of the C99 'restrict' keyword, or to
> nothing if this is not supported. Do not define if restrict is
> supported only directly. */
> #define restrict __restrict__
> /* Work around a bug in older versions of Sun C++, which did not
> #define __restrict__ or support _Restrict or __restrict__
> even though the corresponding Sun C compiler ended up with
> "#define restrict _Restrict" or "#define restrict __restrict__"
> in the previous line. This workaround can be removed once
> we assume Oracle Developer Studio 12.5 (2016) or later. */
> #if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
> # define _Restrict
> # define __restrict__
> #endif
> ```
That's OK.
> > * Can you show the command that is being executed (make V=1)? A
> > symbolic placeholder like 'CXX' is useless for debugging a
> > compilation failure.
>
> ```
> i686-w64-mingw32.static-g++ -std=gnu++11 -DHAVE_CONFIG_H -I. -I.. \
> -I../lib -I../gnulib/src \
> -I../gnulib/src
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/include/freetype2 \
> -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_NO_DEBUG \
> -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I. \
> -I. -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/qt5/include \
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/qt5/include/QtWidgets \
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/qt5/include/QtGui \
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/qt5/include/QtCore \
> -Irelease \
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/qt5/mkspecs/win32-g++ \
> -DBUILD_GUI \
> -I/home/wl/git/mxe/usr/i686-w64-mingw32.static/include/freetype2 \
> -pipe -fno-keep-inline-dllexport -O2 -std=gnu++11 -Wall -Wextra \
> -Wextra -ffunction-sections -fdata-sections -fexceptions -mthreads \
> -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_NO_DEBUG \
> -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -g -O2 \
> -MT ttfautohintGUI-ddlineedit.moc.o -MD -MP -MF \
> .deps/ttfautohintGUI-ddlineedit.moc.Tpo -c \
> -o ttfautohintGUI-ddlineedit.moc.o `test -f 'ddlineedit.moc.cpp' \
> || echo './'`ddlineedit.moc.cpp
> ```
That's also OK.
> > * What are the C compiler and C++ compiler versions that you use in
> > this build?
>
> gcc & g++ 5.5.0, which are the default compilers of mxe
That's also OK. In the past, we could have problems if the C compiler
and the C++ compiler were of a different brand. But that does not seem
to be the case any more.
Bruno
[1] https://doc.qt.io/qt-6/moc.html
