Re: Font problem in 2-lines titles with cairo terminals

I looked at the log file. The problem was that no c++ compiler was 
found. I installed g++. Then I was able to build gnuplot 5.4.3 
successfully with a working wxt terminal.

I am very grateful to you, Peter and Norwid for having helped me. I also 
have learned several very useful things about compiling sources and 
tackling problems.

Happy end, thanks.

Le 17/02/22 à 22:12, Tatsuro MATSUOKA a écrit :
> For wxt terminal, something may be wrong for your intall of libwxgtk for build gnuplot.
>
> In build directory, configure log file "config.log" exist,
> open config.log, and search keyword "wx-config" and what is reported.
> Please report here.
>
> For qt terminal, qt libraries should be installed.
> Note that hey must be massive libraries.
>
> I recomend qt5 because qt4 is obsolate.
> The below is the cygwin's build depends for qt5 library
> libQt5Core-devel, libQt5Gui-devel, libQt5Svg-devel,
> perhaps similar libs are required for the Debian.
>
> Tatsuro
>
>
>
>> ----- Original Message -----
>>
>> From: "hchiPer" <[email protected]>
>> To: "Peter Rockett" <[email protected]>
>> Cc: "[email protected]" <[email protected]>
>> Date: 2022/02/18 金 04:48
>> Subject: Re: [Gnuplot-info] Font problem in 2-lines titles with cairo terminals
>>
>>
>> Thanks a lot Peter.
>>
>> In a virtual machine with the same distro (but 32 bits instead of 64) I
>> have installed successfully (sudo apt install ...):
>> - libwxtgtk3.0-gtk3-dev
>> - libpango1.0-dev
>> - libreadline-dev
>> - libgd-dev
>>
>> I compiled gnuplot (./configure ans make). And the cairo terminals were
>> available. I never thought I could make it! The "ampersand problem" is
>> solved with gnuplot 5.4.3 :)
>>
>> One thing is that wxt (and qt) terminals are not available. I also often
>> use wxt (and sometimes qt). In ./configure summary I read this:
>>
>> - wxt terminal: no (requires c++, wxWidgets>2.6, cairo>0.9, pango>1.22)
>> - Qt terminal: no (use --with-qt or --with_qt=qt4)
>>
>> cairo and pango are not the problem since they were required for the
>> cairo terminals, which work fine.
>>
>> For wxt, it seems I need to install c++ but I don't know exactly which
>> package (apt list give a lot of possibilities) and libwxgtk3.0-gtk3-dev
>> might be a wronk package...?
>>
>> For qt, I tried ./configure --with-qt and ./configure --with-qt=qt4, but
>> the same warning is still there.
>>
>> Anyway I am very happy (and proud) to have been able to compile gnuplot
>> successfully, thanks to your help.
>>
>>
>>
>>
>> Le 17/02/22 à 09:48, Peter Rockett a écrit :
>>> The wxgtk-3.0 and readline8 versions will probably work. They are just
>>> later versions and unlikely to break things.
>>>
>>> You will need to install the *-dev variants of the libraries to build
>>> anything. ('dev' for developer.) They provide the necessary header
>>> files without which you will get "header files do not exist" errors.
>>>
>>> P.
>>>
>>>
>>> On 17/02/2022 07:51, hchiPer wrote:
>>>> Thanks for your reply.
>>>>
>>>> libwxgtk2.8-dev:
>>>> only libwxgtk3.0-gtk3-devavailable and libwxgtk3.0-gtk3-0v5already
>>>> installed
>>>>
>>>> libpango1.0-dev:
>>>> libpango1.0-devavailable and libpango-1.0-0already installed
>>>>
>>>> libreadline5-dev:
>>>> libreadline-dev(8.1-1) available and libreadline8already installed
>>>>
>>>> I'll try this and Tatsuro's advices on a virtual machine first (as I
>>>> wrote, I'm not an long time linux user and I fear to make something
>>>> wrong that might corrupt my system).
>>>>
>>>> Once again, thanks a lot for your help. Step by step I'm going deeper
>>>> in linux knowledge.
>>>>
>>>>
>>>>
>>>> Le 16/02/22 à 10:09, Peter Rockett a écrit :
>>>>> On 15/02/2022 22:02, hchiPer wrote:
>>>>>> The distro I have installed is  Q4OS 4.7 (www.q4os.org). I began
>>>>>> using it because it was said to require few resources and to run
>>>>>> smoothly on rather old machines (mine is more than 10 years old).
>>>>>>
>>>>>> I installed gnuplot 5.4.2 on another computer under Win10, and the
>>>>>> font problem doesn't happen.
>>>>>>
>>>>>> I suspect the cause of the problem is in the cairo or pango
>>>>>> library, but I am not sure.
>>>>>>
>>>>>> I was indeed able to compile 5.4.3, but without the terminals I use
>>>>>> to use (wxt, pngcairo, pdfcairo), it is not very useful.
>>>>> On Debian (and derivatives) you need to install libwxgtk2.8-dev (for
>>>>> the wxt terminal), libpango1.0-dev (for the cairo terminals) and
>>>>> libreadline5-dev (readline support (editing command lines). Follow
>>>>> the configure/make steps below and you should have wxt and the two
>>>>> cairo terminals. Carefully inspect the final lines of the build
>>>>> output since this tells you what has and has not been included; if
>>>>> anything you need is missing you will need to hunt down the
>>>>> necessary dependency.
>>>>>
>>>>> Peter
>>>>>
>>>>>
>>>>>> Thanks anyway for all your help :)
>>>>>>
>>>>>>
>>>>>> Le 15/02/22 à 20:47, Norwid Behrnd a écrit :
>>>>>>> On Tue, 15 Feb 2022 19:54:56 +0100
>>>>>>> hchiPer<[email protected]> wrote:
>>>>>>>
>>>>>>>> It seems 5.4.3 brings the solution, but I'm unable to find a .deb
>>>>>>>> package. And unluckily I'm not able to compile myself.
>>>>>>> Perhaps I missed it, but what is the Linux «based on Debian 11» you
>>>>>>> use?  Is it one of the ubuntu family, like Xubuntu?  Is it Linux
>>>>>>> Mint'
>>>>>>> /Mint/, or the LDME 4 closer to Debian than Mint's Mint? Perhaps
>>>>>>> something specific to your distribution contributes to the problems
>>>>>>> you report which might be beyond reach of Gnuplot.
>>>>>>>
>>>>>>> Curiosity aside, I just fetched Gnuplot (Version 5.4 patchlevel 3,
>>>>>>> last modified 2021-12-24) from sourceforge, decompressed the tar.gz
>>>>>>> (4.5 Mo).  The INSTALL file (no file extension) describes well what
>>>>>>> has to be done to perform the installation, which starts by entering
>>>>>>> the decompressed archive from the terminal.  Then run from the
>>>>>>> terminal `./configure`, followed by `make`, and `make check`. For
>>>>>>> the then following installation /per se/, you possibly need elevated
>>>>>>> administrator privileges, i.e., `sudo make install`. True, you have
>>>>>>> to request `synaptic` once to get GNU Make (e.g., GNU Make 4.3 by
>>>>>>> 2020) to run the make command.  In my case, it overwrites synaptic's
>>>>>>> earlier installation of Gnuplot 5.4 patchlevel 2 from Debian's
>>>>>>> repositories.
>>>>>>>
>>>>>>> Caveat: The installation based on the sourceforge archive does not
>>>>>>> offer you access to wxterm, pngcairo, epscairo, or pdfcairo terminal.
>>>>>>> Yet have the postscript terminal instead to generate a .eps with the
>>>>>>> two-line plot title with escaped ampersand and both lines in serif
>>>>>>> fonts greater than usually seen (by appearance /likely/ a different
>>>>>>> serif font than the by Bistream Vera).
>>>>>>
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