From: Simon Quigley <tsimonq2@debian.org>
Date: Mon, 7 Jan 2019 22:00:33 +0000 (+0000)
Subject: symbol-visibility
X-Git-Tag: archive/raspbian/0.6.3-7+rpi1~1^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=4891187a091571b121c54b4a2f1296554aee66c2;p=yaml-cpp.git

symbol-visibility

commit df9206778fe9ff1bdd56d975c29c43dfe1e66de7
Author: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Date:   Fri Nov 23 15:26:53 2018 +1100

    Export only YAML_CPP_API-tagged symbols on Linux.

    This marks classes tagged with YAML_CPP_API with visibility("default"), to
    explicitly export them, and then makes the default visibility "hidden" via
    -fvisibility=hidden.

    This reduces the number of exported symbols by more than 50%, which has
    a small application start-up time and memory useage benefit. It also
    makes it more feasible to audit the set of exported symbols in automated
    ABI compatibility systems.


Gbp-Pq: Name symbol-visibility.patch
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dfae429..0e40c4f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -154,6 +154,14 @@ if(WIN32)
 	endif()
 endif()
 
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+	set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+	if (POLICY CMP0063)
+		cmake_policy(SET CMP0063 NEW)
+	endif()
+	add_definitions(-DYAML_CPP_USE_VISIBILITY)
+endif()
+
 # GCC or Clang or Intel Compiler specialities
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR
    CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR
diff --git a/include/yaml-cpp/dll.h b/include/yaml-cpp/dll.h
index a32c06b..5b8c905 100644
--- a/include/yaml-cpp/dll.h
+++ b/include/yaml-cpp/dll.h
@@ -27,7 +27,11 @@
 #define YAML_CPP_API __declspec(dllimport)
 #endif  // yaml_cpp_EXPORTS
 #else   // YAML_CPP_DLL
+#ifdef YAML_CPP_USE_VISIBILITY
+#define YAML_CPP_API __attribute__ ((visibility("default")))
+#else
 #define YAML_CPP_API
+#endif // YAML_CPP_USE_VISIBILITY
 #endif  // YAML_CPP_DLL
 
 #endif  // DLL_H_62B23520_7C8E_11DE_8A39_0800200C9A66