From: Benjamin Barenblat <bbaren@google.com>
Date: Fri, 27 May 2022 20:58:38 +0000 (+0100)
Subject: Use libatomic if necessary
X-Git-Tag: archive/raspbian/0_20210324.2-4+rpi1^2~18
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=bf775f3e47d7475e1fc1f4bae170bfb80430ce66;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 942ce90..231182a 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -62,4 +62,8 @@ else()
   set(ABSL_TEST_COPTS "")
 endif()
 
+list(APPEND ABSL_DEFAULT_LINKOPTS
+    "-Wl,--push-state,--as-needed" "-latomic" "-Wl,--pop-state"
+)
+
 set(ABSL_CXX_STANDARD "${CMAKE_CXX_STANDARD}")