diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6223bd606536..23dd6f06ab6c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-07-30  Mike Stump  <mikestump@comcast.net>
+
+	* configure.ac: Also check for popen.
+	* tree-loop-distribution.c (dot_rdg): Autoconfize popen use.
+	* configure: Regenerate.
+	* config.in:  Regenerate.
+
 2014-07-30  Martin Jambor  <mjambor@suse.cz>
 
 	* tree-sra.c (sra_ipa_modify_assign): Change type of the first
diff --git a/gcc/config.in b/gcc/config.in
index 515f3415290a..a1bda76290d8 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -1468,6 +1468,12 @@
 #endif
 
 
+/* Define to 1 if you have the `popen' function. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_POPEN
+#endif
+
+
 /* Define to 1 if you have the `putchar_unlocked' function. */
 #ifndef USED_FOR_TARGET
 #undef HAVE_PUTCHAR_UNLOCKED
diff --git a/gcc/configure b/gcc/configure
index 59f6abfe563d..fe2e6470acc3 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -9285,7 +9285,7 @@ fi
 
 
 for ac_func in times clock kill getrlimit setrlimit atoll atoq \
-	sysconf strsignal getrusage nl_langinfo \
+	popen sysconf strsignal getrusage nl_langinfo \
 	gettimeofday mbstowcs wcswidth mmap setlocale \
 	clearerr_unlocked feof_unlocked   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked   putchar_unlocked putc_unlocked madvise
 do :
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 6de2e94dbe65..ea8eca4d7699 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -1113,7 +1113,7 @@ define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
   putchar_unlocked putc_unlocked)
 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
-	sysconf strsignal getrusage nl_langinfo \
+	popen sysconf strsignal getrusage nl_langinfo \
 	gettimeofday mbstowcs wcswidth mmap setlocale \
 	gcc_UNLOCKED_FUNCS madvise)
 
diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c
index bbf387d6981e..7a18622d3385 100644
--- a/gcc/tree-loop-distribution.c
+++ b/gcc/tree-loop-distribution.c
@@ -228,7 +228,7 @@ DEBUG_FUNCTION void
 dot_rdg (struct graph *rdg)
 {
   /* When debugging, you may want to enable the following code.  */
-#if 1
+#ifdef HAVE_POPEN
   FILE *file = popen ("dot -Tx11", "w");
   if (!file)
     return;