al_get_shader_log man page

#include <allegro5/allegro.h>

const char *al_get_shader_log(ALLEGRO_SHADER *shader)

Return a read-only string containing the information log for a shader program. The log is updated by certain functions, such as al_attach_shader_source(3) or al_build_shader(3) when there is an error.

This function never returns NULL.

5.1.0

al_attach_shader_source(3), al_attach_shader_source_file(3), al_build_shader(3)

al_attach_shader_source(3), al_attach_shader_source_file(3), al_build_shader(3).