From 0644b42d963b425540a3f67f069169ef37f6a51e Mon Sep 17 00:00:00 2001
From: Junichi Kajiwara <junichi.kajiwara@gmail.com>
Date: Mon, 13 Jul 2015 13:37:23 +0900
Subject: [PATCH 1/3] Fix clang support when we use autotools

clang is compatible to C89,but without this patch,configure are mis understood compatiblity of C89.
---
 bin/qrintf | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/bin/qrintf b/bin/qrintf
index 4b91eff..ff804cc 100755
--- a/bin/qrintf
+++ b/bin/qrintf
@@ -62,6 +62,20 @@ if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
 
     # splice "-o fn" from ARGV
     my $output_fn;
+    
+    # for autoconf(C89 comatibirity test) begin
+    for (my $i = 0; $i < @ARGV;) {
+        if ($i + 1 < @ARGV && $ARGV[$i] eq '-c') {
+            $output_fn = $ARGV[$i + 1];
+            $output_fn =~ s/\.c/\.o/;
+            #splice @ARGV, $i, 2;
+            ++$i;
+        } else {
+          ++$i;
+        }
+    }
+    # end
+    
     for (my $i = 0; $i < @ARGV;) {
         if ($i + 1 < @ARGV && $ARGV[$i] eq '-o') {
             $output_fn = $ARGV[$i + 1];

From e3f8a9c23c3785fa9226c9ea85215bbd1d732f71 Mon Sep 17 00:00:00 2001
From: Junichi Kajiwara <junichi.kajiwara@gmail.com>
Date: Mon, 13 Jul 2015 05:36:55 +0000
Subject: [PATCH 2/3] Revert "Merge pull request #1 from
 kjunichi/kjunichi-patch-1"

This reverts commit f6b116816fcf4ed15ecd2f40edee96b12f5d83d1, reversing
changes made to 283a25e4ea975ff0ab0e4b159c161ddca2de2826.
---
 bin/qrintf | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/bin/qrintf b/bin/qrintf
index ff804cc..4b91eff 100755
--- a/bin/qrintf
+++ b/bin/qrintf
@@ -62,20 +62,6 @@ if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
 
     # splice "-o fn" from ARGV
     my $output_fn;
-    
-    # for autoconf(C89 comatibirity test) begin
-    for (my $i = 0; $i < @ARGV;) {
-        if ($i + 1 < @ARGV && $ARGV[$i] eq '-c') {
-            $output_fn = $ARGV[$i + 1];
-            $output_fn =~ s/\.c/\.o/;
-            #splice @ARGV, $i, 2;
-            ++$i;
-        } else {
-          ++$i;
-        }
-    }
-    # end
-    
     for (my $i = 0; $i < @ARGV;) {
         if ($i + 1 < @ARGV && $ARGV[$i] eq '-o') {
             $output_fn = $ARGV[$i + 1];

From f02ad1bfa76f091846a05bce1087b2a8c7e5d65b Mon Sep 17 00:00:00 2001
From: Junichi Kajiwara <junichi.kajiwara@gmail.com>
Date: Mon, 13 Jul 2015 05:42:15 +0000
Subject: [PATCH 3/3] Fix support clang when we use autotools

---
 bin/qrintf | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/bin/qrintf b/bin/qrintf
index 4b91eff..87f2095 100755
--- a/bin/qrintf
+++ b/bin/qrintf
@@ -62,11 +62,16 @@ if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
 
     # splice "-o fn" from ARGV
     my $output_fn;
+    my $coption;
+
     for (my $i = 0; $i < @ARGV;) {
         if ($i + 1 < @ARGV && $ARGV[$i] eq '-o') {
             $output_fn = $ARGV[$i + 1];
             splice @ARGV, $i, 2;
         } else {
+	    if ($i + 1 < @ARGV && $ARGV[$i] eq '-c') {
+		$coption = 1;
+            }
             ++$i;
         }
     }
@@ -78,6 +83,10 @@ if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
             && -e $ARGV[$i]                    # is a file
             && get_preprocessed_fn($ARGV[$i])  # is a file that is recognized as a source file
         ) {
+	    if($ARGV[$i] =~ /\.c$/ &&  !defined $output_fn && defined $coption) {
+		$output_fn = $ARGV[$i];
+		$output_fn =~ s/\.c$/\.o/;
+	    }
             push @files, splice @ARGV, $i, 1;
         } else {
             ++$i;