From: Benjamin Barenblat <bbaren@google.com>
Date: Tue, 9 Feb 2021 19:41:06 +0000 (+0000)
Subject: Use libatomic if necessary
X-Git-Tag: archive/raspbian/0_20210324.2-3+rpi1~1^2^2~5
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success/%22http:/www.example.com/cgi/success?a=commitdiff_plain;h=f5a08880d80d31a9c93c990206602b05b797e500;p=abseil.git

Use libatomic if necessary

Bug-Debian: https://bugs.debian.org/973492

On some architectures, notably armel, Abseil needs symbols defined in
libatomic. Abseil does not currently have a well-developed system to
declare external library dependencies, so just have the linker determine
if anything needs libatomic and add the DT_NEEDED entry where necessary.


Gbp-Pq: Name latomic.diff
---

diff --git a/absl/copts/AbseilConfigureCopts.cmake b/absl/copts/AbseilConfigureCopts.cmake
index acd46d0..92dd601 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -64,4 +64,8 @@ else()
   set(ABSL_TEST_COPTS "")
 endif()
 
+list(APPEND ABSL_DEFAULT_LINKOPTS
+    "-Wl,--as-needed" "-latomic" "-Wl,--no-as-needed"
+)
+
 set(ABSL_CXX_STANDARD "${CMAKE_CXX_STANDARD}")