Use somewhat longer C++ program to detect whether linking requires the C++
compiler. Fixes #559429. 2.2 bugfix candidate.
diff --git a/configure b/configure
index aca0410..28a5834 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
#! /bin/sh
-# From configure.in Revision: 1.317 .
+# From configure.in Revision: 1.318 .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.53.
#
@@ -3037,7 +3037,7 @@
if test -z "$CXX"; then
LINKCC="\$(PURIFY) \$(CC)"
else
- echo 'int main(){return 0;}' > conftest.$ac_ext
+ echo 'void foo();int main(){foo();}void foo(){}' > conftest.$ac_ext
$CXX -c conftest.$ac_ext 2>&5
if $CC -o conftest$ac_exeext conftest.$ac_objext 2>&5 \
&& test -s conftest$ac_exeext && ./conftest$ac_exeext
diff --git a/configure.in b/configure.in
index 37c6f63..1003761 100644
--- a/configure.in
+++ b/configure.in
@@ -309,7 +309,7 @@
if test -z "$CXX"; then
LINKCC="\$(PURIFY) \$(CC)"
else
- echo 'int main(){return 0;}' > conftest.$ac_ext
+ echo 'void foo();int main(){foo();}void foo(){}' > conftest.$ac_ext
$CXX -c conftest.$ac_ext 2>&5
if $CC -o conftest$ac_exeext conftest.$ac_objext 2>&5 \
&& test -s conftest$ac_exeext && ./conftest$ac_exeext