Compiling in Centos 6 fails

[Former user]

When trying to compile libgd in Centos 6.4 it fails with a message

gd_jpeg.c:228: error: ‘TRUE’ undeclared (first use in this function) gd_jpeg.c:228: error: (Each undeclared identifier is reported only once

Solution :

Edit gd_jpeg.c

replace all instances of TRUE with true replace all instances of FALSE with false

It compiles perfectly after that. Maybe it is worth incorporating in the source code itself.

[Chris Reuter]

Really, they should be set to GD_TRUE and GD_FALSE respectively, since those are guaranteed to be defined in the GD source tree. TRUE and FALSE are defined (on my system--Ubuntu 13.04) in a JPEG lib header file.

Actually, this behaviour is kind of wierd. Are you sure it's being compiled with gcc and not g++? 'true' and 'false' are not keywords in C. (They are, however, defined as standard macros in stdbool.h.)

[Pierre Joye]

don't we have GD_TRUE/FALSE already?

[Pierre Joye]

fixed in GD-2.1 and master