| From 9e82eb57870ec7c01734b44ed4bb994362004df3 Mon Sep 17 00:00:00 2001 |
| From: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| Date: Fri, 27 Dec 2019 10:20:53 +0100 |
| Subject: [PATCH] CMakeLists.txt: check for atomic library |
| |
| On some architectures, atomic binutils are provided by the libatomic |
| library from gcc. Linking with libatomic is therefore necessary, |
| otherwise the build fails with: |
| |
| [100%] Linking CXX executable leveldbutil |
| /home/fabrice/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/7.4.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: libleveldb.a(env_posix.cc.o): in function `leveldb::(anonymous namespace)::Limiter::Acquire()': |
| env_posix.cc:(.text+0x124): undefined reference to `__atomic_fetch_sub_4' |
| |
| This is often for example the case on sparcv8 32 bit. |
| |
| Fixes: |
| - http://autobuild.buildroot.org/results/01d5a50581ac9e9b46f40e6f9665f74897db5e6f |
| |
| Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> |
| [Upstream status: https://github.com/google/leveldb/pull/765] |
| --- |
| CMakeLists.txt | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| diff --git a/CMakeLists.txt b/CMakeLists.txt |
| index be41ba4..9d6773f 100644 |
| --- a/CMakeLists.txt |
| +++ b/CMakeLists.txt |
| @@ -41,6 +41,7 @@ include(CheckIncludeFile) |
| check_include_file("unistd.h" HAVE_UNISTD_H) |
| |
| include(CheckLibraryExists) |
| +check_library_exists(atomic __atomic_fetch_add_4 "" HAVE_ATOMIC) |
| check_library_exists(crc32c crc32c_value "" HAVE_CRC32C) |
| check_library_exists(snappy snappy_compress "" HAVE_SNAPPY) |
| check_library_exists(tcmalloc malloc "" HAVE_TCMALLOC) |
| @@ -270,6 +271,9 @@ if(HAVE_CLANG_THREAD_SAFETY) |
| -Werror -Wthread-safety) |
| endif(HAVE_CLANG_THREAD_SAFETY) |
| |
| +if(HAVE_ATOMIC) |
| + target_link_libraries(leveldb atomic) |
| +endif(HAVE_ATOMIC) |
| if(HAVE_CRC32C) |
| target_link_libraries(leveldb crc32c) |
| endif(HAVE_CRC32C) |
| -- |
| 2.24.0 |
| |
