1 files changed, 56 insertions, 1 deletions
diff --git a/extra/snappy/rtti.patch b/extra/snappy/rtti.patch
index 77b8178..80f89ff 100644
--- a/extra/snappy/rtti.patch
+++ b/extra/snappy/rtti.patch
@@ -1 +1,56 @@
-Too Many Requests
-\ No newline at end of file
+From f73b11e87dfbe1cb4862b8ee489679d99534f40b Mon Sep 17 00:00:00 2001
+From: Tim Serong <tserong@suse.com>
+Date: Wed, 27 Oct 2021 18:49:04 +1100
+Subject: [PATCH] Re-enable RTTI (needed in order to subclass Source, etc.)
+
+Commit c98344f in snappy 1.1.9 disabled RTTI, which means the
+snappy library no longer exports typeinfo for snappy::Source,
+snappy::Sink, ..., so users of the library can't subclass these
+classes anymore.
+
+Here's a trivial reproducer:
+
+  #include <snappy-sinksource.h>
+  class MySource : snappy::Source {
+  public:
+    size_t Available() const override { return 0; }
+    const char *Peek(size_t *len) override { return NULL; }
+    void Skip(size_t n) override {}
+  };
+  int main(int argc, char **argv) {
+    MySource m;
+    return 0;
+  }
+
+Try `g++ -o snappy-test ./snappy-test.cc -lsnappy` with the above
+and the linker will fail with "undefined reference to `typeinfo
+for snappy::Source'" if RTTI was disabled in the snappy build.
+---
+ CMakeLists.txt | 7 -------
+ 1 file changed, 7 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 6eef485..755605d 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -51,10 +51,6 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   string(REGEX REPLACE "/EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
+   add_definitions(-D_HAS_EXCEPTIONS=0)
+-
+-  # Disable RTTI.
+-  string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
+ else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   # Use -Wall for clang and gcc.
+   if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
+@@ -77,9 +73,6 @@ else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
+ 
+-  # Disable RTTI.
+-  string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
+ endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+ 
+ # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make