-STAGE1_CFLAGS=@stage1_cflags@
-STAGE1_CHECKING=@stage1_checking@
-STAGE1_LANGUAGES=@stage1_languages@
+STAGE1_CFLAGS = @stage1_cflags@
+STAGE1_CHECKING = @stage1_checking@
+STAGE1_LANGUAGES = @stage1_languages@
+# * We force-disable intermodule optimizations, even if
+# --enable-intermodule was passed, since the installed compiler
+# probably can't handle them. Luckily, autoconf always respects
+# the last argument when conflicting --enable arguments are passed.
+# * Likewise, we force-disable coverage flags, since the installed
+# compiler probably has never heard of them.
+STAGE1_CONFIGURE_FLAGS = --disable-intermodule $(STAGE1_CHECKING) \
+ --disable-coverage --enable-languages="$(STAGE1_LANGUAGES)"
+
+STAGEprofile_CFLAGS = $(STAGE2_CFLAGS) -fprofile-generate
+STAGEprofile_TFLAGS = $(STAGE2_TFLAGS)
+
+STAGEfeedback_CFLAGS = $(STAGE3_CFLAGS) -fprofile-use
+STAGEfeedback_TFLAGS = $(STAGE3_TFLAGS)
+
+do-compare = @do_compare@
+do-compare3 = $(do-compare)