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From: Benjamin Barenblat <bbaren@google.com>
Subject: 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.
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -62,4 +62,8 @@
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}")
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