From 3636f8c0f56ddf15e26e28e7a38e748588fad976 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 22 Oct 2013 03:11:20 +0000
Subject: [PATCH] configure.in: check CFLAGS and LDFLAGS

* configure.in: check if the given CFLAGS and LDFLAGS are working, and
  bail out early if not.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43382 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    |  5 +++++
 configure.in | 19 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index cf6f4761b7..d8f1982731 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Oct 22 12:11:16 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in: check if the given CFLAGS and LDFLAGS are working, and
+	  bail out early if not.
+
 Tue Oct 22 00:06:57 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (rb_file_exists_p): warn deprecated name.  [Bug #9041]
diff --git a/configure.in b/configure.in
index 5d51abb37c..875d95bf90 100644
--- a/configure.in
+++ b/configure.in
@@ -645,6 +645,25 @@ else
   unset ac_c_werror_flag
 fi])
 
+RUBY_WERROR_FLAG([
+    AC_MSG_CHECKING([whether CFLAGS is valid])
+    AC_TRY_COMPILE([], [],
+	[AC_MSG_RESULT(yes)],
+	[
+	AC_MSG_RESULT(no)
+	AC_MSG_ERROR([something wrong with CFLAGS="$CFLAGS"])
+	]
+    )
+    AC_MSG_CHECKING([whether LDFLAGS is valid])
+    AC_TRY_LINK([], [],
+	[AC_MSG_RESULT(yes)],
+	[
+	AC_MSG_RESULT(no)
+	AC_MSG_ERROR([something wrong with LDFLAGS="$LDFLAGS"])
+	]
+    )
+])
+
 AC_DEFUN(RUBY_TRY_CFLAGS, [
     AC_MSG_CHECKING([whether ]$1[ is accepted as CFLAGS])
     RUBY_WERROR_FLAG([