* lib/mkmf.rb (try_cppflags, try_cflags, try_ldflags): replace the

  target flags if the given flag is accepted.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34828 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index a29e5bafbd..9f31166b5f 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -550,6 +550,12 @@ MSG
     $CPPFLAGS = cppflags unless ret
   end
 
+  def try_cppflags(flags)
+    with_cppflags(flags) do
+      try_header("int main() {return 0;}")
+    end
+  end
+
   def with_cflags(flags)
     cflags = $CFLAGS
     $CFLAGS = flags
@@ -558,6 +564,12 @@ MSG
     $CFLAGS = cflags unless ret
   end
 
+  def try_cflags(flags)
+    with_cflags(flags) do
+      try_compile("int main() {return 0;}")
+    end
+  end
+
   def with_ldflags(flags)
     ldflags = $LDFLAGS
     $LDFLAGS = flags
@@ -566,6 +578,12 @@ MSG
     $LDFLAGS = ldflags unless ret
   end
 
+  def try_ldflags(flags)
+    with_ldflags(flags) do
+      try_link("int main() {return 0;}")
+    end
+  end
+
   def try_static_assert(expr, headers = nil, opt = "", &b)
     headers = cpp_include(headers)
     try_compile(<<SRC, opt, &b)