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| -rw-r--r-- | modules/ECMGenerateHeaders.cmake | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/modules/ECMGenerateHeaders.cmake b/modules/ECMGenerateHeaders.cmake new file mode 100644 index 00000000..963e13b9 --- /dev/null +++ b/modules/ECMGenerateHeaders.cmake @@ -0,0 +1,61 @@ +# - Function to generate forward includes for your project +# This module provides the function ECM_GENERATE_HEADERS +# +# The ECM_GENERATE_HEADERS function is used to generate C/C++ forwarding header +# files for your project. +# +# To be more precise, there will be two kinds of headers being generated. Lowercase +# and CamelCase, for convenience. That means that for a class named "ClassA" in a +# module called "Module" we will get 2 different files: Module/ClassA and +# module/classa.h. Both these files will be including a "classa.h" file that is +# expected to be in the headers dir (see HEADERS_DIR argument below). +# +# ECM_GENERATE_HEADERS( ClassA ClassB ... +# [MODULE_NAME name] +# [OUTPUT_DIR path]) +# +# The MODULE_NAME argument is used to provide information about where the +# directories will be generated. By default, PROJECT_NAME will be used in both +# CamelCase and lowercase version. +# +# The OUTPUT_DIR argument specifies where the files will be generated; this +# should be within the build directory. By default, CMAKE_CURRENT_BINARY_DIR +# will be used. +# +# +# Copyright (c) 2013, Aleix Pol Gonzalez <aleixpol@blue-systems.com> +# +# Redistribution and use is allowed according to the terms of the BSD license. +# For details see the accompanying COPYING-CMAKE-SCRIPTS file. +# + +include(CMakeParseArguments) + +function(ECM_GENERATE_HEADERS) + set(oneValueArgs MODULE_NAME OUTPUT_DIR) + cmake_parse_arguments(EGH "" "${oneValueArgs}" "" ${ARGN}) + if(NOT EGH_MODULE_NAME) + set(EGH_MODULE_NAME ${PROJECT_NAME}) + endif() + + if(NOT EGH_OUTPUT_DIR) + set(EGH_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}) + endif() + + string(TOLOWER ${EGH_MODULE_NAME} lowercasemodule) + foreach(_CLASSNAME ${EGH_UNPARSED_ARGUMENTS}) + string(TOLOWER ${_CLASSNAME} lowercaseclassname) + set(REGULAR_HEADER_NAME ${EGH_OUTPUT_DIR}/${lowercasemodule}/${lowercaseclassname}.h) + set(FANCY_HEADER_NAME ${EGH_OUTPUT_DIR}/${EGH_MODULE_NAME}/${_CLASSNAME}) + set(_actualheader "${CMAKE_CURRENT_SOURCE_DIR}/${lowercaseclassname}.h") + if (NOT EXISTS ${_actualheader}) + message(FATAL_ERROR "Could not find \"${_actualheader}\"") + endif() + if (NOT EXISTS ${REGULAR_HEADER_NAME}) + file(WRITE ${REGULAR_HEADER_NAME} "#include \"${_actualheader}\"\n") + endif() + if (NOT EXISTS ${FANCY_HEADER_NAME}) + file(WRITE ${FANCY_HEADER_NAME} "#include \"${lowercasemodule}/${lowercaseclassname}.h\"\n") + endif() + endforeach() +endfunction() |