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39 lines
1.4 KiB
CMake
39 lines
1.4 KiB
CMake
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#
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# Check if the file system is case sensitive or not
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# Inspired by Andreas Lauser's cmake at:
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# https://github.com/OPM/opm-parser/blob/master/cmake/Modules/CheckCaseSensitiveFileSystem.cmake
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# Included in sdrangle (LGPL3) - with permission.
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#
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# Sets the following variable:
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# HAVE_CASE_SENSITIVE_FILESYSTEM True if the file system honors the case of files
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#
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# I dislike that we have to emit a file from CMake, but I can't think of a better way.
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message(STATUS "Check for case-sensitive file systems")
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string(RANDOM LENGTH 6 ALPHABET abcdefghijklmnopqrstuvwxyz TMP_FILE_L)
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set(TMP_FILE_L "${TMP_FILE_L}.tmp")
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string(TOUPPER ${TMP_FILE_L} TMP_FILE_U)
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string(TIMESTAMP TMP_TIME)
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set(TMP_FILE_CONTENTS "${TMP_FILE_L} ${TMP_TIME}")
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# create a uppercase file
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file(WRITE "${CMAKE_BINARY_DIR}/${TMP_FILE_U}" "${TMP_FILE_CONTENTS}")
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# test if lowercase file can be opened
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set(FileContents "")
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if (EXISTS "${CMAKE_BINARY_DIR}/${TMP_FILE_L}")
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file(READ "${CMAKE_BINARY_DIR}/${TMP_FILE_L}" FileContents)
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endif()
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# remove the file
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file(REMOVE "${CMAKE_BINARY_DIR}/${TMP_FILE_U}")
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# check the contents
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# If it is empty, the file system is case sensitive.
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if ("${FileContents}" STREQUAL "${TMP_FILE_CONTENTS}")
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message(STATUS "File system is not case-sensitive")
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set(HAVE_CASE_SENSITIVE_FILESYSTEM 0)
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else()
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message(STATUS "File system is case-sensitive")
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set(HAVE_CASE_SENSITIVE_FILESYSTEM 1)
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endif()
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