[Buildroot] [PATCH 1/2] package/snappy: enable rtti

From: Bernd Kuhls <bernd@kuhls.net>
To: buildroot@buildroot.org
Cc: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Subject: [Buildroot] [PATCH 1/2] package/snappy: enable rtti
Date: Thu,  9 Apr 2026 13:03:09 +0200	[thread overview]
Message-ID: <20260409110310.3641004-1-bernd@kuhls.net> (raw)

Added patch to enable rtti, needed for upcoming bump of rocksdb to fix
link error:

output/per-package/rocksdb/host/bin/../lib/gcc/x86_64-buildroot-linux-
gnu/15.2.0/../../../../x86_64-buildroot-linux-gnu/bin/ld:
 librocksdb.so.10.7.5: undefined reference to `typeinfo for snappy::Sink'

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
---
 .../0002-add-option-to-enable-rtti.patch      | 52 +++++++++++++++++++
 package/snappy/snappy.mk                      |  5 +-
 2 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 package/snappy/0002-add-option-to-enable-rtti.patch

diff --git a/package/snappy/0002-add-option-to-enable-rtti.patch b/package/snappy/0002-add-option-to-enable-rtti.patch
new file mode 100644
index 0000000000..e82328b0ff
--- /dev/null
+++ b/package/snappy/0002-add-option-to-enable-rtti.patch
@@ -0,0 +1,52 @@
+From 376f14b5933e91d08ade6a503fdd657a6e01a149 Mon Sep 17 00:00:00 2001
+From: Max <tchristy001@outlook.com>
+Date: Wed, 24 Nov 2021 12:16:23 -0600
+Subject: [PATCH] add option to enable rtti, set default to current behavior
+
+Upstream: https://github.com/google/snappy/pull/147 (rejected)
+
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+[rebased for 1.2.2]
+---
+ CMakeLists.txt | 14 ++++++++++----
+ 1 file changed, 10 insertions(+), 4 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 6eef485..aefd35b 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -53,8 +53,10 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   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-")
++  if(NOT SNAPPY_ENABLE_RTTI)
++    string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
++    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
++  endif(SNAPPY_ENABLE_RTTI)
+ else(MSVC)
+   # Use -Wall for clang and gcc.
+   if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
+@@ -78,8 +80,10 @@ else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+   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 "${CMAKE_CXX_FLAGS} -fno-rtti")
++  if(NOT SNAPPY_ENABLE_RTTI)
++    string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
++    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
++  endif(SNAPPY_ENABLE_RTTI)
+ endif(MSVC)
+ 
+ # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
+@@ -98,6 +102,8 @@ option(SNAPPY_REQUIRE_AVX2 "Target processors with AVX2 support." OFF)
+ 
+ option(SNAPPY_INSTALL "Install Snappy's header and library" ON)
+ 
++option(SNAPPY_ENABLE_RTTI "Enable RTTI for Snappy's library" OFF)
++
+ include(TestBigEndian)
+ test_big_endian(SNAPPY_IS_BIG_ENDIAN)
+ 
diff --git a/package/snappy/snappy.mk b/package/snappy/snappy.mk
index 57c688b673..cd61bbb078 100644
--- a/package/snappy/snappy.mk
+++ b/package/snappy/snappy.mk
@@ -10,6 +10,9 @@ SNAPPY_LICENSE = BSD-3-Clause
 SNAPPY_LICENSE_FILES = COPYING
 SNAPPY_CPE_ID_VENDOR = google
 SNAPPY_INSTALL_STAGING = YES
-SNAPPY_CONF_OPTS = -DSNAPPY_BUILD_BENCHMARKS=OFF -DSNAPPY_BUILD_TESTS=OFF
+SNAPPY_CONF_OPTS = \
+	-DSNAPPY_BUILD_BENCHMARKS=OFF \
+	-DSNAPPY_BUILD_TESTS=OFF \
+	-DSNAPPY_ENABLE_RTTI=ON
 
 $(eval $(cmake-package))
-- 
2.47.3

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