[3.9] bpo-38443: Check that the specified universal architectures work (GH-22910) (GH-23451)

As [[bpo-38443]()]() says the error message from configure when specifying --enable-universalsdk with a set of architectures that is not supported by the compiler is not very helpful.   This PR explicitly checks if the compiler works and bails out if it doesn't.
(cherry picked from commit 0f20bd9042c9b7fce20c3b9511cd0820b30094c3)


Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/configure b/configure
index 9e6fd46..040c828 100755
--- a/configure
+++ b/configure
@@ -7571,6 +7571,31 @@ $as_echo_n "checking which MACOSX_DEPLOYMENT_TARGET to use... " >&6; }
         { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MACOSX_DEPLOYMENT_TARGET" >&5
 $as_echo "$MACOSX_DEPLOYMENT_TARGET" >&6; }
 
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if specified universal architectures work" >&5
+$as_echo_n "checking if specified universal architectures work... " >&6; }
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdio.h>
+int
+main ()
+{
+printf("%d", 42);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+             as_fn_error $? "check config.log and use the '--with-universal-archs' option" "$LINENO" 5
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+
         # end of Darwin* tests
         ;;
     esac