[Help-glpk] compile error in examples of glpk-4.2 source

[Marcos Roberto Silva]

Hi,
I am trying to install de GLPK-4.2, and when I compile de examples, the 
error output is:

address@hidden glpk-4.2]$ make
Making all in include
make[1]: Entering directory `/home/marcos/glpk-4.2/include'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/marcos/glpk-4.2/include'
Making all in src
make[1]: Entering directory `/home/marcos/glpk-4.2/src'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/marcos/glpk-4.2/src'
Making all in examples
make[1]: Entering directory `/home/marcos/glpk-4.2/examples'
gcc  -g -O2  -o glpsol  glpsol.o ../src/libglpk.a
../src/libglpk.a(glpmpl3.o): In function `glp_mpl_fp_power':
/home/marcos/glpk-4.2/src/glpmpl3.c:164: undefined reference to `log'
/home/marcos/glpk-4.2/src/glpmpl3.c:164: undefined reference to `log'
/home/marcos/glpk-4.2/src/glpmpl3.c:164: undefined reference to `log'
/home/marcos/glpk-4.2/src/glpmpl3.c:164: undefined reference to `log'
/home/marcos/glpk-4.2/src/glpmpl3.c:170: undefined reference to `log'
../src/libglpk.a(glpmpl3.o):/home/marcos/glpk-4.2/src/glpmpl3.c:170: 
more undefined references to `log' follow
../src/libglpk.a(glpmpl3.o): In function `glp_mpl_fp_power':
/home/marcos/glpk-4.2/src/glpmpl3.c:173: undefined reference to `pow'
../src/libglpk.a(glpmpl3.o): In function `glp_mpl_fp_exp':
/home/marcos/glpk-4.2/src/glpmpl3.c:183: undefined reference to `log'
/home/marcos/glpk-4.2/src/glpmpl3.c:185: undefined reference to `exp'
../src/libglpk.a(glpmpl3.o): In function `glp_mpl_fp_log':
/home/marcos/glpk-4.2/src/glpmpl3.c:196: undefined reference to `log'
../src/libglpk.a(glpmpl3.o): In function `glp_mpl_fp_log10':
/home/marcos/glpk-4.2/src/glpmpl3.c:207: undefined reference to `log10'
collect2: ld returned 1 exit status
make[1]: *** [glpsol] Error 1
make[1]: Leaving directory `/home/marcos/glpk-4.2/examples'
make: *** [all-recursive] Error 1

What's wrong? How can I fix this? I am with all standard includes in my 
pc, including math.h.
The libglpk.a was created with no problems.

Thanks,

Marcos Roberto Silva
Sao Paulo - Brazil