3dfb949861
ptsname is not thread-safe. ptsname_r is available on most (but not all) systems -- use it preferentially. In the patch I also improve the thread-safety of the ptsname fallback path by wrapping it in a mutex. This should guarantee the safety of a typical ptsname implementation using a single static buffer, as long as all callers go through this function. I also remove the error arguments, as the only way this function can fail is if the "primary" fd is not valid. This is a programmer error as this requirement is documented, and all callers ensure that is the case. Differential Revision: https://reviews.llvm.org/D88728
47 lines
1.6 KiB
CMake
47 lines
1.6 KiB
CMake
# This file contains all the logic for running configure-time checks
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include(CheckSymbolExists)
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include(CheckIncludeFile)
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include(CheckIncludeFiles)
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include(CheckLibraryExists)
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set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
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check_symbol_exists(ppoll poll.h HAVE_PPOLL)
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check_symbol_exists(ptsname_r stdlib.h HAVE_PTSNAME_R)
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set(CMAKE_REQUIRED_DEFINITIONS)
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check_symbol_exists(sigaction signal.h HAVE_SIGACTION)
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check_cxx_symbol_exists(accept4 "sys/socket.h" HAVE_ACCEPT4)
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check_include_file(termios.h HAVE_TERMIOS_H)
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check_include_file("sys/types.h" HAVE_SYS_TYPES_H)
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check_include_files("sys/types.h;sys/event.h" HAVE_SYS_EVENT_H)
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check_cxx_symbol_exists(process_vm_readv "sys/uio.h" HAVE_PROCESS_VM_READV)
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check_cxx_symbol_exists(__NR_process_vm_readv "sys/syscall.h" HAVE_NR_PROCESS_VM_READV)
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check_library_exists(compression compression_encode_buffer "" HAVE_LIBCOMPRESSION)
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# These checks exist in LLVM's configuration, so I want to match the LLVM names
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# so that the check isn't duplicated, but we translate them into the LLDB names
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# so that I don't have to change all the uses at the moment.
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set(LLDB_ENABLE_TERMIOS ${HAVE_TERMIOS_H})
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if (UNIX)
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set(LLDB_ENABLE_POSIX ON)
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else()
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set(LLDB_ENABLE_POSIX OFF)
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endif()
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if(NOT LLDB_CONFIG_HEADER_INPUT)
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set(LLDB_CONFIG_HEADER_INPUT ${LLDB_INCLUDE_ROOT}/lldb/Host/Config.h.cmake)
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endif()
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if(NOT LLDB_CONFIG_HEADER_OUTPUT)
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set(LLDB_CONFIG_HEADER_OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/include/lldb/Host/Config.h)
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endif()
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# This should be done at the end
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configure_file(
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${LLDB_CONFIG_HEADER_INPUT}
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${LLDB_CONFIG_HEADER_OUTPUT}
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)
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