configure: don't use dangling temp file state

There was implicit assumption that the $TMPC file is empty when doing
--cpu=host checks. This breaks if any check is done before that.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/configure b/configure
index c0a4c3c87c..d87f264b46 100755
--- a/configure
+++ b/configure
@@ -5298,6 +5298,7 @@ if test "$cpu" = host; then
     case "$cc_type" in
         gcc|llvm_gcc)
             check_native(){
+                : > $TMPC
                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
                 sed -n "/cc1.*$1=/{
                             s/.*$1=\\([^ ]*\\).*/\\1/
@@ -5309,6 +5310,7 @@ if test "$cpu" = host; then
         ;;
         clang)
             check_native(){
+                : > $TMPC
                 $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
                 sed -n "/cc1.*-target-cpu /{
                             s/.*-target-cpu \\([^ ]*\\).*/\\1/