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add configure check for working compiler 

without this, broken choices of CC/CPPFLAGS/CFLAGS don't show up until
late in the configure process where they are confusingly reported as a
different failure such as incorrect long double type.
This commit is contained in:
Rich Felker 2014-05-12 14:22:57 -04:00
parent ac0acd569e
commit 8945667fad
1 changed files with 9 additions and 0 deletions
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9
configure vendored
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@ -189,6 +189,15 @@ trycc ${CROSS_COMPILE}cc
printf "%s\n" "$CC" printf "%s\n" "$CC"
test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; } test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
printf "checking whether C compiler works... "
echo "typedef int x;" > "$tmpc"
if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then
printf "yes\n"
else
printf "no; compiler output follows:\n%s\n" "$output"
exit 1
fi
# #
# Only build musl-gcc wrapper if toolchain does not already target musl # Only build musl-gcc wrapper if toolchain does not already target musl
# #