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Fix CXX version build issue in Apple clang #1784

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Fix CXX version build issue in Apple clang #1784

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9 changes: 9 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,15 @@ if(NOT CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
option(ABSL_ENABLE_INSTALL "Enable install rule" OFF)
else()
option(ABSL_ENABLE_INSTALL "Enable install rule" ON)
if(NOT DEFINED CMAKE_CXX_STANDARD)
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
message("CXX standard set to 14.")
endif()
endif()

if(NOT DEFINED CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD LESS 14)
message(FATAL_ERROR "Abseil requires at least C++14.")
endif()

set(CMAKE_INSTALL_RPATH "$ORIGIN")
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