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diff --git a/src/Native/Unix/CMakeLists.txt b/src/Native/Unix/CMakeLists.txt
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index 7d804a1e54..717c2718d7 100644
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--- a/src/Native/Unix/CMakeLists.txt
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+++ b/src/Native/Unix/CMakeLists.txt
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@@ -25,7 +25,6 @@ add_compile_options(-fPIC)
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add_compile_options(-I${CMAKE_CURRENT_SOURCE_DIR}/Common)
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add_compile_options(-I${CMAKE_CURRENT_BINARY_DIR}/Common)
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add_compile_options(-g)
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-add_compile_options(-Werror)
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if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
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add_compile_options(-Wno-unreachable-code)
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endif ()
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diff --git a/src/Native/Unix/configure.cmake b/src/Native/Unix/configure.cmake
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index f4a30ad6cb..f2db68402a 100644
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--- a/src/Native/Unix/configure.cmake
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+++ b/src/Native/Unix/configure.cmake
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@@ -27,6 +27,12 @@ else ()
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message(FATAL_ERROR "Unknown platform. Cannot define PAL_UNIX_NAME, used by RuntimeInformation.")
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endif ()
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+
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+set (PREVIOUS_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
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+set (CMAKE_CXX_FLAGS "-D_GNU_SOURCE")
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+set (PREVIOUS_CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
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+set (CMAKE_C_FLAGS "-D_GNU_SOURCE")
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+
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# We compile with -Werror, so we need to make sure these code fragments compile without warnings.
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# Older CMake versions (3.8) do not assign the result of their tests, causing unused-value errors
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# which are not distinguished from the test failing. So no error for that one.
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@@ -698,6 +704,9 @@ endif()
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set (CMAKE_REQUIRED_LIBRARIES)
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+set (CMAKE_CXX_FLAGS "${PREVIOUS_CMAKE_CXX_FLAGS}")
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+set (CMAKE_C_FLAGS "${PREVIOUS_CMAKE_C_FLAGS}")
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+
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check_c_source_compiles(
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"
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#include <sys/inotify.h>
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