When I try to compile a C program using glpk functions, I get the the following error at the linker. I've checked the include path and it contains glpk.h and the lib contains libglpk. I'm compiling on a 64-bit machine running ubuntu 11.10
/tmp/ccPR8ZKY.o: In function `main': scheduler_main.c:(.text+0x10): undefined reference to `glp_create_prob' scheduler_main.c:(.text+0x2b): undefined reference to `glp_set_prob_name' scheduler_main.c:(.text+0x3f): undefined reference to `glp_set_obj_name' scheduler_main.c:(.text+0x1ab): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x1c7): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x262): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x27e): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x2ef): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x30b): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x359): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x375): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x3a1): undefined reference to `glp_set_col_bnds' scheduler_main.c:(.text+0x3f3): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x40f): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x43b): undefined reference to `glp_set_col_bnds' scheduler_main.c:(.text+0x481): undefined reference to `glp_add_cols' scheduler_main.c:(.text+0x49d): undefined reference to `glp_set_col_kind' scheduler_main.c:(.text+0x4c9): undefined reference to `glp_set_col_bnds' scheduler_main.c:(.text+0x4dd): undefined reference to `glp_set_obj_dir' scheduler_main.c:(.text+0x4fe): undefined reference to `glp_set_obj_coef' scheduler_main.c:(.text+0x529): undefined reference to `glp_set_obj_coef' scheduler_main.c:(.text+0x55b): undefined reference to `glp_add_rows' scheduler_main.c:(.text+0x583): undefined reference to `glp_set_row_bnds' scheduler_main.c:(.text+0x60d): undefined reference to `glp_init_iocp' scheduler_main.c:(.text+0x626): undefined reference to `glp_intopt' scheduler_main.c:(.text+0x648): undefined reference to `glp_mip_status' scheduler_main.c:(.text+0x668): undefined reference to `glp_mip_status' scheduler_main.c:(.text+0x688): undefined reference to `glp_mip_status' scheduler_main.c:(.text+0x6a8): undefined reference to `glp_mip_status' collect2: ld returned 1 exit status
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