tests: do not clobber the modified CC If CC is originally a losing compiler, AM_PROG_CC_C_O will modify CC. "$MAKE -e" will then clobber this modified CC and reintroduce the raw losing compiler causing the test to fail, as subdir-objects is in effect. tests/check8.test: Drop -e from the $MAKE invocation, since AM_COLOR_TESTS is not specified in the Makefile and -e is therefore not needed.