diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 33602270c7e..c137b110064 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2001-12-20  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* aclocal.m4 (gcc_AC_PROG_GNAT): Run prospective ada drivers in
+	subshells.
+	* configure.in: Likewise for perl Pod::Man.
+
+	* configure: Regenerated.
+
 2001-12-20  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* builtin-attrs.def (__builtin_printf_unlocked,
diff --git a/gcc/aclocal.m4 b/gcc/aclocal.m4
index 90fdb691f21..2fd6095af7c 100644
--- a/gcc/aclocal.m4
+++ b/gcc/aclocal.m4
@@ -321,7 +321,7 @@ for cand in ${ac_tool_prefix}$user_adac	$user_adac	\
   # has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.
   # Therefore we must check for the error message as well as an
   # unsuccessful exit.
-  errors=`$cand -c conftest.adb 2>&1 || echo failure`
+  errors=`($cand -c conftest.adb) 2>&1 || echo failure`
   if test x"$errors" = x; then
     gcc_cv_prog_adac=$cand
     break
diff --git a/gcc/configure b/gcc/configure
index 385810cf63a..a32fa3ae54e 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -2997,7 +2997,7 @@ for cand in ${ac_tool_prefix}$user_adac	$user_adac	\
   # has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.
   # Therefore we must check for the error message as well as an
   # unsuccessful exit.
-  errors=`$cand -c conftest.adb 2>&1 || echo failure`
+  errors=`($cand -c conftest.adb) 2>&1 || echo failure`
   if test x"$errors" = x; then
     gcc_cv_prog_adac=$cand
     break
@@ -3124,7 +3124,7 @@ fi
 # Is pod2man recent enough to regenerate manpages?
 echo $ac_n "checking for recent Pod::Man""... $ac_c" 1>&6
 echo "configure:3127: checking for recent Pod::Man" >&5
-if perl -e 'use 1.10 Pod::Man' >/dev/null 2>&1; then
+if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
   echo "$ac_t""yes" 1>&6
   GENERATED_MANPAGES=generated-manpages		
 else
diff --git a/gcc/configure.in b/gcc/configure.in
index 8cbc7666f80..f1f52be2f00 100644
--- a/gcc/configure.in
+++ b/gcc/configure.in
@@ -501,7 +501,7 @@ fi
 
 # Is pod2man recent enough to regenerate manpages?
 AC_MSG_CHECKING([for recent Pod::Man])
-if perl -e 'use 1.10 Pod::Man' >/dev/null 2>&1; then
+if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
   AC_MSG_RESULT(yes)
   GENERATED_MANPAGES=generated-manpages		AC_SUBST(GENERATED_MANPAGES)
 else