38 lines
1.4 KiB
CMake
38 lines
1.4 KiB
CMake
# SoX Resampler Library Copyright (c) 2007-16 robs@users.sourceforge.net
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# Licence for this file: LGPL v2.1 See LICENCE for details.
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# Sets CMAKE_SYSTEM_PROCESSOR for cross-compiling.
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macro (set_system_processor)
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if (CMAKE_CROSSCOMPILING)
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if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "unknown")
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unset(CMAKE_SYSTEM_PROCESSOR)
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endif ()
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if (NOT DEFINED CMAKE_SYSTEM_PROCESSOR)
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include (CheckCSourceCompiles)
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set (CPU_LINES
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"#if defined __x86_64__ || defined _M_X64 /*\;x86_64\;*/"
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"#if defined __i386__ || defined _M_IX86 /*\;x86_32\;*/"
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"#if defined __arm__ || defined _M_ARM /*\;arm\;*/"
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)
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foreach (CPU_LINE ${CPU_LINES})
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string (CONCAT CPU_SOURCE "${CPU_LINE}" "
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int main() {return 0;}
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#endif
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")
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unset (SYSTEM_PROCESSOR_DETECTED CACHE)
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check_c_source_compiles ("${CPU_SOURCE}" SYSTEM_PROCESSOR_DETECTED)
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if (SYSTEM_PROCESSOR_DETECTED)
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list (GET CPU_LINE 1 CMAKE_SYSTEM_PROCESSOR)
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message (STATUS "CMAKE_SYSTEM_PROCESSOR is ${CMAKE_SYSTEM_PROCESSOR}")
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break ()
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endif ()
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endforeach ()
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endif ()
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# N.B. Will not overwrite existing cache variable:
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set (CMAKE_SYSTEM_PROCESSOR "${CMAKE_SYSTEM_PROCESSOR}"
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CACHE STRING "Target system processor")
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endif ()
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endmacro ()
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