Re: Build with MinGW

[Bastian M. <bma...@we...>]

>On 25.03.2011 20:21, Bastian Märkisch wrote:
>> When trying to build with MinGW and cairo/pango, I noticed a weird
>> problem: make seems to have problems with variables defined like this:
>>
>> 	CAIRO_CFLAGS = $(shell pkg-config --cflags cairo)
>
>Note that the make documentation pretty strongly recommends not to do 
>that.  They recommend the other type of variable definition instead:
>
>	CAIRO_CFLAGS := $(shell pkg-config --cflags cairo)
>
>One of the issues is that with the '=' style definition, pkg-config 
>would be called every single time that you use any command (indirectly) 
>including $(CAIRO_CFLAGS).  Not something I fell particularly 
>comfortable doing on MS Windows.

Thanks for the clarification. I have updated config/mingw/Makefile accordingly.

>
>> -DGNUPLOT_PS_DIR="share/PostScript" -DGNUPLOT_JS_DIR="share/js"
>> 
>> libs/include/freetype2 -Id:/Software/mingw-libs/include/libpng14
>                          --^^--
>> 
>
>Hmmm... I'm not sure drive letters are a good idea in makefiles (or 
>anywhere in a MinGW environment, for that matter).  They tend to royally 
>screw up make's usual interpretation of ':' for starters.
>
>Is that raw MinGW, as opposed to MSYS+MinGW you're using?  AFAICS, 
>that's not been the typical setup for quite some time now.
>

That is MinGW+MSYS. It is really the pkg-config tool which returns these drive 
letters. Tatsuro Matsuoka's solution was to edit all the .pc files. The updated 
Makefile filters them out with the help of sed instead.

  Bastian