From 6fe9724121402e05ddc23254bde099397598d015 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sun, 11 Apr 2021 14:47:36 +0000
Subject:  Do not compile or link into /dev/null

---
 configure | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index 9cb852d..b54c325 100755
--- a/configure
+++ b/configure
@@ -94,7 +94,7 @@ stripdir () {
 tryflag () {
   echo "Checking whether compiler accepts $2 ..."
   echo "typedef int x;" > "$tmpc"
-  if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST "$2" -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+  if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST "$2" -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
     echo "  ... yes"
     eval "$1=\"\${$1} \$2\""
     eval "$1=\${$1# }"
@@ -108,7 +108,7 @@ tryflag () {
 tryldflag () {
   echo "Checking whether linker accepts $2 ..."
   echo "typedef int x;" > "$tmpc"
-  if $CC_AUTO $CFLAGS_AUTO $CFLAGS $CFLAGS_POST $LDFLAGS_AUTO $LDFLAGS $LDFLAGS_POST -nostdlib "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+  if $CC_AUTO $CFLAGS_AUTO $CFLAGS $CFLAGS_POST $LDFLAGS_AUTO $LDFLAGS $LDFLAGS_POST -nostdlib "$2" -o "$tmpe" "$tmpc" >/dev/null 2>&1 ; then
     echo "  ... yes"
     eval "$1=\"\${$1} \$2\""
     eval "$1=\${$1# }"
@@ -228,13 +228,15 @@ set -C
 while : ; do
   i=$(($i+1))
   tmpc="./tmp-configure-$$-$PPID-$i.c"
+  tmpo="./tmp-configure-$$-$PPID-$i.o"
   tmpe="./tmp-configure-$$-$PPID-$i.tmp"
   2>|/dev/null > "$tmpc" && break
+  2>|/dev/null > "$tmpo" && break
   2>|/dev/null > "$tmpe" && break
   test "$i" -gt 50 && fail "$0: cannot create temporary files"
 done
 set +C
-trap 'rm -f "$tmpc" "$tmpe"' EXIT ABRT INT QUIT TERM HUP
+trap 'rm -f "$tmpc" "$tmpo" "$tmpe"' EXIT ABRT INT QUIT TERM HUP
 
 # Set slashpackage values
 if $slashpackage ; then
@@ -297,7 +299,7 @@ test -n "$CC_AUTO" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
 echo "  ... $CC_AUTO"
 echo "Checking whether C compiler works... "
 echo "typedef int x;" > "$tmpc"
-if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST -c -o /dev/null "$tmpc" 2>"$tmpe" ; then
+if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST -c -o "$tmpo" "$tmpc" 2>"$tmpe" ; then
   echo "  ... yes"
 else
   echo "  ... no. Compiler output follows:"
-- 
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