boost: warning-patch-ectomy

Upstream maintainers, with few exceptions, generally don't care about
warnings in boost headers, hence we re-base our warning fix patches on
every upgrade, which is a pointless exercise in frustration.

Most of the patches are for GCC/Clang warnings, where we could use
-isystem to suppress the warnings (with corresponding hacks in the build
system, because -isystem also disables dependency generation) - but
clang-cl does not support -isystem.

So generate a bunch of wrapper headers into external/boost/include, that
disable all known warnings and use #include_next to get the real boost
header. This allows us to get rid of most of the existing patches.

There is however a bug in GCC that preprocessor warnings like -Wundef
cannot be disabled with a #pragma, so those patches cannot be removed.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53431

Change-Id: I2992bf4a463015f1140489df867bd80757f84541
Reviewed-on: https://gerrit.libreoffice.org/25563
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/external/boost/boost.type_index.Wundef.warnings.patch b/external/boost/boost.type_index.Wundef.warnings.patch
new file mode 100644
index 000000000000..c542924239b7
--- /dev/null
+++ b/external/boost/boost.type_index.Wundef.warnings.patch
@@ -0,0 +1,12 @@
+diff -ru boost.orig/boost/type_index/stl_type_index.hpp boost/boost/type_index/stl_type_index.hpp
+--- foo/misc/boost.orig/boost/type_index/stl_type_index.hpp	2015-06-21 22:16:46.000000000 +0200
++++ foo/misc/boost/boost/type_index/stl_type_index.hpp	2015-07-16 22:55:42.886944806 +0200
+@@ -174,7 +174,7 @@
+ 
+ 
+ inline std::size_t stl_type_index::hash_code() const BOOST_NOEXCEPT {
+-#if _MSC_VER > 1600 || (__GNUC__ == 4 && __GNUC_MINOR__ > 5 && defined(__GXX_EXPERIMENTAL_CXX0X__))
++#if (defined(_MSC_VER) && _MSC_VER > 1600) || (__GNUC__ == 4 && __GNUC_MINOR__ > 5 && defined(__GXX_EXPERIMENTAL_CXX0X__))
+     return data_->hash_code();
+ #else
+     return boost::hash_range(raw_name(), raw_name() + std::strlen(raw_name()));