6d6cd58e34
Add a new compiler flag to warn against invalid PCH generation in the future. Remove temporary PCH workaround for all Clang compilers.
83 lines
4.0 KiB
CMake
83 lines
4.0 KiB
CMake
#
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# Copyright (c) 2008-2020 the Urho3D project.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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# Check the capability of the host system
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#
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# NULL_DEVICE
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#
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# WIN32 only:
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# HAS_MKLINK (capable to create mklink which is analogous to symlink)
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#
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# non-WIN32:
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# HAS_LIB64 (multilib capable)
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# CCACHE_VERSION (when ccache is used)
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#
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# Neither here nor there:
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# BASH_ON_WINDOWS
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#
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if (CMAKE_HOST_WIN32)
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set (NULL_DEVICE nul)
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if (NOT DEFINED HAS_MKLINK)
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# Test whether the host system is capable of setting up symbolic link
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execute_process (COMMAND cmd /C mklink test-link CMakeCache.txt WORKING_DIRECTORY ${CMAKE_BINARY_DIR} RESULT_VARIABLE MKLINK_EXIT_CODE OUTPUT_QUIET ERROR_QUIET)
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if (MKLINK_EXIT_CODE EQUAL 0)
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set (HAS_MKLINK TRUE)
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file (REMOVE ${CMAKE_BINARY_DIR}/test-link)
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else ()
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set (HAS_MKLINK FALSE)
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message (WARNING "Could not use MKLINK to setup symbolic links as this Windows user account does not have the privilege to do so. "
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"When MKLINK is not available then the build system will fallback to use file/directory copy of the library headers from source tree to build tree. "
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"In order to prevent stale headers being used in the build, this file/directory copy will be redone also as a post-build step for each library targets. "
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"This may slow down the build unnecessarily or even cause other unforseen issues due to incomplete or stale headers in the build tree. "
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"Request your Windows Administrator to grant your user account to have privilege to create symlink via MKLINK command. "
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"You are NOT advised to use the Administrator account directly to generate build tree in all cases.")
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endif ()
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set (HAS_MKLINK ${HAS_MKLINK} CACHE INTERNAL "MKLINK capability")
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endif ()
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else ()
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set (NULL_DEVICE /dev/null)
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if (NOT DEFINED HAS_LIB64)
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if (EXISTS /usr/lib64)
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set (HAS_LIB64 TRUE)
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else ()
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set (HAS_LIB64 FALSE)
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endif ()
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set (HAS_LIB64 ${HAS_LIB64} CACHE INTERNAL "Multilib capability")
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endif ()
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# Test if it is a userspace bash on Windows host system
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if (NOT DEFINED BASH_ON_WINDOWS)
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execute_process (COMMAND grep -cq Microsoft /proc/version RESULT_VARIABLE GREP_EXIT_CODE OUTPUT_QUIET ERROR_QUIET)
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if (GREP_EXIT_CODE EQUAL 0)
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set (BASH_ON_WINDOWS TRUE)
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endif ()
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set (BASH_ON_WINDOWS ${BASH_ON_WINDOWS} CACHE INTERNAL "Bash on Ubuntu on Windows")
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endif ()
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if ("$ENV{USE_CCACHE}" AND NOT DEFINED CCACHE_VERSION)
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execute_process (COMMAND ccache --version COMMAND head -1 RESULT_VARIABLE CCACHE_EXIT_CODE OUTPUT_VARIABLE CCACHE_VERSION ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
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string (REGEX MATCH "[^ .]+\\.[^.]+\\.[^ ]+" CCACHE_VERSION "${CCACHE_VERSION}") # Stringify as it could be empty when an error has occurred
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if (CCACHE_EXIT_CODE EQUAL 0)
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set (CCACHE_VERSION ${CCACHE_VERSION} CACHE INTERNAL "ccache version")
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endif ()
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endif ()
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endif ()
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