--- a/cpu68k/Makefile.am
+++ b/cpu68k/Makefile.am
@@ -29,6 +29,7 @@
 
 gen68k_SOURCES = gen68k.c tab68k.c
 gen68k_DEPENDENCIES = def68k-iibs.h
+BUILT_SOURCES = def68k-iibs.h
 
 noinst_LIBRARIES = lib68k.a
 lib68k_a_SOURCES = cpu68k-0.c cpu68k-1.c cpu68k-2.c cpu68k-3.c \
--- a/main/Makefile.am
+++ b/main/Makefile.am
@@ -3,11 +3,11 @@
 INCLUDES = -I../hdr -I. -I../cpu68k -I../ym2612 -I../raze -I../cmz80 \
            -I../sn76496 -I../gtkopts \
            -DFNAME_TCLSCRIPT=\"${datadir}/generator/gen.tcl\" \
-           @GTK_CFLAGS@ @SDL_CFLAGS@
+           @SDL_CFLAGS@
 bin_PROGRAMS = @PROGRAM@
 EXTRA_PROGRAMS = generator-svgalib generator-tcltk generator-allegro \
                  generator-gtk generator-sdl
-LDADD = ../cpu68k/lib68k.a ../ym2612/libym2612.a @MY_LIBS@ \
+LDADD = ../cpu68k/lib68k.a ../ym2612/libym2612.a @MY_LIBS@ -lm \
         ../sn76496/libsn76496.a
 
 ## this should be generator_tcltk_DATA but it won't let me do that