------- Comment #15 from jakub at gcc dot gnu dot org 2008-06-09 06:59 ------- "Unless you can find a way to localize those environment changes only to the tested compiler (by setting/restoring them around every call to the compiler being tested for example), HOSTCC must set/clear all the environment variables that it uses."
Unfortunately, $HOSTCC is invoked from tcl, not from shell, so e.g. sticking unset GCC_EXEC_PREFIX; into $HOSTCC doesn't work. The patch I've posted a few days ago temporarily removes it from the environment for $HOSTCC invocations in struct-layout-1.exp. Other than that, ALT_*_UNDER_TEST might contain a host compiler, so similar unsetting/setting would be needed in c-compat.exp too. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36443
