From: Timo Heister <timo.heister@gmail.com>
Date: Fri, 29 Aug 2014 20:25:39 +0000 (-0400)
Subject: Suppress clang warnings when compiling bundled boost 1.56
X-Git-Tag: v8.2.0-rc1~172^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F121%2Fhead;p=dealii.git

Suppress clang warnings when compiling bundled boost 1.56

Clang generates a bunch of warnings of the type:
bundled/boost-1.56.0/include/boost/preprocessor/tuple/eat.hpp:23:26: warning: variadic macros are a C99 feature [-Wvariadic-macros]
bundled/boost-1.56.0/include/boost/mpl/if.hpp:131:1: warning: empty macro arguments are a C99 feature [-Wc99-extensions]

This patch just disables those warnings. Also see https://code.google.com/p/dealii/issues/detail?id=252
---

diff --git a/cmake/setup_compiler_flags_gnu.cmake b/cmake/setup_compiler_flags_gnu.cmake
index 21159946c1..838e1ba079 100644
--- a/cmake/setup_compiler_flags_gnu.cmake
+++ b/cmake/setup_compiler_flags_gnu.cmake
@@ -113,6 +113,11 @@ IF(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-unused-private-field")
   ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-unused-variable")
   ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-unsupported-friend")
+
+  # suppress warnings in boost 1.56:
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-c++11-extensions")
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-c99-extensions")
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-Wno-variadic-macros")
 ENDIF()