From d170b19e500d85381369e379771be8d7816bcc92 Mon Sep 17 00:00:00 2001
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From: Adam Duskett <Aduskett@gmail.com>
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Date: Tue, 21 Jul 2020 13:08:50 -0700
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Subject: [PATCH] force position independent code
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Without this option, programs building for arm64 or x86-64 will fail when
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attempting to link to the built libraries with the following (abbreviated)
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error:
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"relocation against `.rodata' can not be used when making a shared object;
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recompile with -fPIC."
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Because libabseil-cpp builds static libraries, it is better to set the
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POSITION_INDEPENDENT_CODE to ON instead of forcing fPIC, as forcing fPIC may
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cause relocation errors when shared libraries link against the built static
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libraries.
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Signed-off-by: Adam Duskett <Aduskett@gmail.com>
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---
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CMake/AbseilHelpers.cmake | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
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index 86ff9eb..bdb7a89 100644
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--- a/CMake/AbseilHelpers.cmake
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+++ b/CMake/AbseilHelpers.cmake
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@@ -209,6 +209,8 @@ function(absl_cc_library)
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set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD})
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set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
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+ # Without this setting, other programs such as GRPC will fail when linking.
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+ set_property(TARGET ${_NAME} PROPERTY POSITION_INDEPENDENT_CODE ON)
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# When being installed, we lose the absl_ prefix. We want to put it back
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# to have properly named lib files. This is a no-op when we are not being
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# installed.
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--
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2.26.2
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