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76 lines
3.5 KiB
CMake
76 lines
3.5 KiB
CMake
# Find a D compiler!
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#
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# Use variable D_COMPILER first if defined by user, then try the environment variable DMD, next use a list of common compiler executables.
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#
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# The following variables are defined:
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# D_COMPILER_FOUND - true if a D compiler was found
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# D_COMPILER - D compiler
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# D_COMPILER_FLAGS - D compiler flags (could be passed in the DMD environment variable)
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# D_COMPILER_ID = {"DigitalMars", "LDMD", "LDC", "GDC"}
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# D_COMPILER_VERSION_STRING - String containing the compiler version, e.g. "DMD64 D Compiler v2.070.2"
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# D_COMPILER_DMD_COMPAT - true if the D compiler cmdline interface is compatible with DMD
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set(D_COMPILER_FOUND "FALSE")
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set(COMMON_D_COMPILERS "ldmd2" "dmd" "gdmd")
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set(COMMON_D_COMPILER_PATHS "/usr/bin" "/usr/local/bin" "C:\\d\\dmd2\\windows\\bin")
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if (D_COMPILER)
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get_filename_component(D_COMPILER ${D_COMPILER} PROGRAM PROGRAM_ARGS D_COMPILER_FLAGS_ENV_INIT)
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if(D_COMPILER_FLAGS_ENV_INIT)
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set(D_COMPILER_FLAGS "${D_COMPILER_FLAGS_ENV_INIT}" CACHE STRING "Default flags for D compiler")
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endif()
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if(NOT EXISTS ${D_COMPILER})
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message(FATAL_ERROR "Could not find compiler set in variable D_COMPILER: ${D_COMPILER}.")
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endif()
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elseif($ENV{DMD} MATCHES ".+")
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get_filename_component(D_COMPILER $ENV{DMD} PROGRAM PROGRAM_ARGS D_COMPILER_FLAGS_ENV_INIT CACHE)
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if(D_COMPILER_FLAGS_ENV_INIT)
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set(D_COMPILER_FLAGS "${D_COMPILER_FLAGS_ENV_INIT}" CACHE STRING "Default flags for D compiler")
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endif()
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if(NOT EXISTS ${D_COMPILER})
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message(FATAL_ERROR "Could not find compiler set in environment variable DMD: $ENV{DMD}.")
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endif()
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else()
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# "NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH" is necessary, otherwise CMake will find the compiler in the install prefix path!
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find_program(D_COMPILER NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH NAMES ${COMMON_D_COMPILERS} PATHS ${COMMON_D_COMPILER_PATHS} DOC "D compiler")
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endif()
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# TODO: Test compiler and set compiler ID
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if (D_COMPILER)
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set(D_COMPILER_FOUND "TRUE")
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get_filename_component(__D_COMPILER_NAME ${D_COMPILER} NAME_WE)
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if (__D_COMPILER_NAME STREQUAL "dmd")
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set(D_COMPILER_ID "DigitalMars")
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set(D_COMPILER_DMD_COMPAT "TRUE")
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elseif (__D_COMPILER_NAME STREQUAL "ldmd2")
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set(D_COMPILER_ID "LDMD")
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set(D_COMPILER_DMD_COMPAT "TRUE")
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elseif (__D_COMPILER_NAME STREQUAL "ldc2")
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set(D_COMPILER_ID "LDC")
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set(D_COMPILER_DMD_COMPAT "FALSE")
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elseif (__D_COMPILER_NAME STREQUAL "gdc")
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set(D_COMPILER_ID "GDC")
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set(D_COMPILER_DMD_COMPAT "FALSE")
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elseif (__D_COMPILER_NAME STREQUAL "gdmd")
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set(D_COMPILER_ID "GDMD")
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set(D_COMPILER_DMD_COMPAT "TRUE")
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endif()
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# Older versions of ldmd do not have --version cmdline option, but the error message still contains the version info in the first line.
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execute_process(COMMAND ${D_COMPILER} --version
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OUTPUT_VARIABLE D_COMPILER_VERSION_STRING
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ERROR_VARIABLE D_COMPILER_VERSION_STRING
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ERROR_QUIET)
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string(REGEX MATCH "^[^\r\n:]*" D_COMPILER_VERSION_STRING "${D_COMPILER_VERSION_STRING}")
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endif()
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if (D_COMPILER_FOUND)
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message(STATUS "Found host D compiler ${D_COMPILER}, with default flags '${D_COMPILER_FLAGS}'")
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message(STATUS "Host D compiler version: ${D_COMPILER_VERSION_STRING}")
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else()
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message(FATAL_ERROR "No D compiler found! Try setting the 'D_COMPILER' variable or 'DMD' environment variable.")
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endif()
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