mirror of https://github.com/labapart/gattlib
96 lines
3.2 KiB
CMake
96 lines
3.2 KiB
CMake
#
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# SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
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#
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# Copyright (c) 2016-2021, Olivier Martin <olivier@labapart.org>
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#
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#
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# Version: 1.0
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# Repository: https://gist.github.com/oliviermartin/
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# Description:
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#
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# Add Cross-Compilation support when the environment variables
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# CROSS_COMPILE and SYSROOT are defined
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#
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# Check required environment variables
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#
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if ("$ENV{CROSS_COMPILE}" STREQUAL "")
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# Cross compilation is not needed
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# We still set CPACK_PACKAGE_ARCHITECTURE
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if (NOT DEFINED CPACK_PACKAGE_ARCHITECTURE)
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execute_process(COMMAND uname -m OUTPUT_VARIABLE CPACK_PACKAGE_ARCHITECTURE OUTPUT_STRIP_TRAILING_WHITESPACE)
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endif()
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return()
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endif()
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if ("$ENV{SYSROOT}" STREQUAL "")
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message(WARNING "Environment variable SYSROOT is not defined.")
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endif()
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# Trigger cross-compilation in CMake
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set(CMAKE_SYSTEM_NAME Linux)
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# Specify the cross compiler
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set(CMAKE_C_COMPILER $ENV{CROSS_COMPILE}gcc)
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set(CMAKE_CXX_COMPILER $ENV{CROSS_COMPILE}g++)
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# Specify the target environment
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set(CMAKE_FIND_ROOT_PATH $ENV{SYSROOT})
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set(CMAKE_SYSROOT $ENV{SYSROOT})
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# Retrieve the machine supported by the toolchain
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execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpmachine OUTPUT_VARIABLE TOOLCHAIN_MACHINE OUTPUT_STRIP_TRAILING_WHITESPACE)
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# Add '--sysroot' to the compiler flags
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set(ENV{CFLAGS} "--sysroot=$ENV{SYSROOT} $ENV{CFLAGS}")
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# Add '-rpath' to the linker flags
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set(ENV{LDFLAGS} "--sysroot=$ENV{SYSROOT} -Wl,-rpath,$ENV{SYSROOT}/lib/${TOOLCHAIN_MACHINE} $ENV{LDFLAGS}")
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#
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# Configure pkg-config for cross-compilation
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#
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if(IS_DIRECTORY "$ENV{SYSROOT}/usr/lib/pkgconfig")
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set(ENV{PKG_CONFIG_PATH} $ENV{SYSROOT}/usr/lib/pkgconfig)
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endif()
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if(IS_DIRECTORY "$ENV{SYSROOT}/usr/lib/${TOOLCHAIN_MACHINE}/pkgconfig")
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set(ENV{PKG_CONFIG_PATH} $ENV{SYSROOT}/usr/lib/${TOOLCHAIN_MACHINE}/pkgconfig)
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endif()
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if (NOT "$ENV{PKG_CONFIG_PATH}" STREQUAL "")
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set(ENV{PKG_CONFIG_SYSROOT_DIR} $ENV{SYSROOT})
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# Don't strip -I/usr/include out of cflags
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set(ENV{PKG_CONFIG_ALLOW_SYSTEM_CFLAGS} 1)
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# Don't strip -L/usr/lib out of libs
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set(ENV{PKG_CONFIG_ALLOW_SYSTEM_LIBS} 1)
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endif()
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# Workaround as some pkgconfig file forgot to add the architecture specific include folder
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# such as openssl.pc
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include_directories($ENV{SYSROOT}/usr/include $ENV{SYSROOT}/usr/include/${TOOLCHAIN_MACHINE})
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# Workaround as some library are installed in $ENV{SYSROOT}/lib/${TOOLCHAIN_MACHINE}
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# such as libpcre.so (required by glib-2.0)
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link_directories($ENV{SYSROOT}/lib/${TOOLCHAIN_MACHINE})
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link_directories($ENV{SYSROOT}/usr/lib/${TOOLCHAIN_MACHINE})
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# search for programs in the build host directories
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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# for libraries and headers in the target directories
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set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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#
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# Set architecture for CPack
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#
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if ("${TOOLCHAIN_MACHINE}" STREQUAL "arm-linux-gnueabihf")
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set(CPACK_PACKAGE_ARCHITECTURE armhf)
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set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE armhf)
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set(CPACK_RPM_PACKAGE_ARCHITECTURE armv7hl)
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endif()
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if ("${TOOLCHAIN_MACHINE}" STREQUAL "aarch64-linux-gnu")
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set(CPACK_PACKAGE_ARCHITECTURE arm64)
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set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE arm64)
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set(CPACK_RPM_PACKAGE_ARCHITECTURE aarch64)
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endif()
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