Thrift-1462: add more strict compiler flags

Reverting MINGW addition for c+++0x 



git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1213905 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/compiler/cpp/Makefile.am b/compiler/cpp/Makefile.am
index 28813dc..a5723a3 100644
--- a/compiler/cpp/Makefile.am
+++ b/compiler/cpp/Makefile.am
@@ -86,13 +86,7 @@
                   src/generate/t_go_generator.cc
 
 thrift_CPPFLAGS = -I$(srcdir)/src
-
-if MINGW
 thrift_CXXFLAGS = -Wall
-else
-thrift_CXXFLAGS = -Wall -Wextra -std=c++0x -pedantic
-endif
-
 thrift_LDADD = @LEXLIB@ libparse.a
 
 libparse_a_CPPFLAGS = -I$(srcdir)/src