In order to avoid missing math functions when linking the test programs, move the LDFLAGS (which notably contains -lm) to the end of the compile line.
cc -o test_guff test_guff.o -lm \
args.o ascii.o counter.o draw.o fnv.o input.o regression.o scale.o svg.o test_draw.o test_input.o test_regression.o test_scale.o test_types.o -std=c99 -g -Wall -pedantic -O3
/usr/bin/ld: ascii.o: in function `print_header':
/home/jeff/src/guff/ascii.c:63: undefined reference to `exp'
/usr/bin/ld: /home/jeff/src/guff/ascii.c:63: undefined reference to `exp'
/usr/bin/ld: /home/jeff/src/guff/ascii.c:57: undefined reference to `exp'
/usr/bin/ld: /home/jeff/src/guff/ascii.c:57: undefined reference to `exp'
/usr/bin/ld: scale.o: in function `scale_transform':
/home/jeff/src/guff/scale.c:45: undefined reference to `log'
/usr/bin/ld: /home/jeff/src/guff/scale.c:40: undefined reference to `log'
/usr/bin/ld: /home/jeff/src/guff/scale.c:45: undefined reference to `log'
/usr/bin/ld: /home/jeff/src/guff/scale.c:40: undefined reference to `log'
/usr/bin/ld: svg.o: in function `svg_plot':
/home/jeff/src/guff/svg.c:68: undefined reference to `log'
/usr/bin/ld: svg.o: in function `scale_tick':
/home/jeff/src/guff/svg.c:131: undefined reference to `log10'
/usr/bin/ld: /home/jeff/src/guff/svg.c:131: undefined reference to `pow'
/usr/bin/ld: /home/jeff/src/guff/svg.c:131: undefined reference to `log10'
/usr/bin/ld: /home/jeff/src/guff/svg.c:131: undefined reference to `pow'
collect2: error: ld returned 1 exit status
make: *** [Makefile:38: test_guff] Error 1
0001-Fix-compile-instruction-for-test_.patch.gz
In order to avoid missing math functions when linking the test programs, move the LDFLAGS (which notably contains
-lm) to the end of the compile line.0001-Fix-compile-instruction-for-test_.patch.gz