More on cross-compiling (Codeblocks targets)

Following two old posts (Cross-compiling windows applications under linux with wine and DevC++ and Compiling win32 binaries on linux) here another post on cross-compiling windows applications on linux.

DevC++ has apparently been droped by its creators, as it has been years since its last release.

After that I am willing to migrate some projetcs to Codeblocks. To not loose to much productivity, I am using a windows vitual machine (Virtual Box) to compile my windows projects, with DevC++, Codeblocks and Borland C++ Builder.

But what I want most is to do everything from my emacs window. Until I can do it so, I am using Codeblocks which is a multiplatform IDE, running on Windows, Linux and Mac.

Codeblocks has a target option to its projects. One can set diferent target platforms for the same project. The same project can be opened on diferent Codeblocks versions, linux and windows for example, and, with the propoer target configuration, be compiled for windows and for linux even folowing different kind of dependencies at each platform.

Codeblocks wiki has a simple, but nice, tutorial on cross compiling wxWidgets with codeblocks.

Comments

More trickery with gnuplot dumb terminal

In my post " Plotting memory usage on console " the chart doesn't pan the data. Now, using a named pipe, the effect got a little bit nicer. First, we have to run the memUsage.sh script to get a file filled with memory usage info: ./memUsage.sh > memUsage.dat & Then we have to create a named pipe: mkfifo pipe Now we have to run another process to tail only the last 64 lines from the memUsage.dat while [ 1 ]; do tail -64 memUsage.dat> pipe; done & And now we just have to plot the data from the pipe: watch -n 1 'gnuplot -e "set terminal dumb;p \"pipe\" with lines"' And that is it!

Replace transparency in PNG images with white background (for lots of files...)

I had to remove transparency from a PNG image file from the command line... and stack overflow came into my help[1]... But I needed it for lots of files... then, adding a "while read line" did the job: ls -1 *.png | cut -d . -f 1 | while read line; do convert -flatten $line.png flatten/$line.png ; done; [1] Replace transparency in PNG images with white background https://stackoverflow.com/questions/2322750/replace-transparency-in-png-images-with-white-background

Pettry rendered LaTeX equations using PHP

When I was writing a simple scientific webapp, during my undergrads studies, I needed to generate some equations to be shown by the app. I was already familiar with LaTeX equation formatting syntax, so I decided to use this nice peace of software. So, after "googling" a little, I found the imgtex , written by Koji Nakamaru , which is a fast CGI script, written in perl. What I did, was port it to PHP. To run it, you must have a LaTeX distribution and the dvipng software both installed on the same machine which you will run the PHP script. Here is the PHP code: To use this code, you just have to pass the LaTeX commands through GET to the PHP. For example, adding the following string to your URL: http://localhost/imgtex.php?res=300&cmd=x=\frac{-b\pm\sqrt{-4ac}}{2a} The res variable sets the resolution for the generated image and the cmd specifies the LaTeX command. This way, the above URL will produce the following image:

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