From: Benjamin Barenblat <bbaren@google.com>
Date: Mon, 12 May 2025 15:26:59 +0000 (+0200)
Subject: Use libatomic if necessary
X-Git-Tag: archive/raspbian/20220623.1-1+rpi1+deb12u2^2~5
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=574ab15ae1ed295bc4688db3278a5b4b102d98c3;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 73435e9..0dce69f 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -94,4 +94,8 @@ 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}")