[Fontconfig] Issue Compiling fontconfig

[Akira TAGOH]

You provided some logs though that seems not containing any useful
information how you did it. I can't say too much off hand. but
basically both using *_CFLAGS/LIBS directly and settings them through
pkg-config doesn't makes too much different. if that works through
pkg-config, that would means you did set *_CFLAGS/LIBS wrongly.

On Sat, Jul 14, 2018 at 3:00 AM, Antelmo Aguilar <aaguilar at nd.edu> wrote:
> Hi again,
>
> I wanted to give an update.  I decided to use the other approach (using the
> PKG_CONFIG_PATH environment variable).  I was able to compile fontconfig
> using that environment variable.  So it seems that there is an issue with
> using the other approach that gets recommended.
>
> -Antelmo
>
> On Fri, Jul 13, 2018 at 1:42 PM, Antelmo Aguilar <aaguilar at nd.edu> wrote:
>>
>> Hello,
>>
>> I am having issues compiling the latest version of Fontconfig from source
>> in a Red Hat 7 system.  I am unsure where the issue is exactly, but I
>> suspect that for some reason the FREETYPE_LIBS and FREETYPE_CFLAGS
>> environment variables are not being used correctly.
>>
>> I compiled Freetype 2.9 by source and installed it on both a custom
>> directory and the default directory.  Using the environment variables to
>> specify the location of freetype did allow the configuration script to find
>> freetype.  At first I did not pay attention to the lines after the
>> configuration script said it did find freetype so I continued with the
>> "make" command once the configuration was done.
>>
>> After doing the make command, it complained that it was unable to find the
>> ft2build.h file.  More specifically, it gave me this error:
>>
>> make[3]: Entering directory
>> `/opt/test_build/fontconfig/src/fontconfig-2.13.0/src'
>>   CC       fcfreetype.lo
>> In file included from fcftint.h:26:0,
>>                  from fcfreetype.c:48:
>> ../fontconfig/fcfreetype.h:27:22: fatal error: ft2build.h: No such file or
>> directory
>>  #include <ft2build.h>
>>                       ^
>> compilation terminated.
>>
>>
>> From my logic, I would have assumed that the FREETYPE_CFLAGS environment
>> variable would tell fontconfig where to find the ft2build.h (which I double
>> checked the directory I set in that variable and it did indeed contain the
>> header file fontconfig was complaining it could not find).
>>
>> So I found a workaround for fontconfig to find the "missing" header file
>> by using the CPPFLAGS environment variable to also contain the include
>> directory for Freetype.  This allowed the compilation to continue, but then
>> it gave an error again.  This pastebin is an example of the output from make
>> when I received that error: https://pastebin.com/2WzyVrTx
>>
>> As you can see, "make" gives several linking warnings which I suspect is
>> what causes the undefined reference error in the end.  The undefined
>> references are from functions that are defined in the Freetype library and I
>> was able to verify that they are there using the "nm" command.
>>
>> So I really have no idea why fontconfig is unable to link the freetype
>> library to find these functions.  Also, here is a pastebin of the
>> configuration output:   https://pastebin.com/bHyeFCh5
>>
>> I had mentioned that I did not pay attention to the lines after the
>> configuration script said it found Freetype.  While I was diagnosing the
>> issue, I noticed that the configuration script was also unable to find the
>> Freetype functions that it checks for even though they are defined in the
>> library file of Freetype.
>>
>> Hopefully someone can help point out what I might be doing wrong, but so
>> far it seems that there might be an issue with the configuration script.
>> Thanks in advance.
>>
>> -Antelmo
>
>
>
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-- 
Akira TAGOH