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authorStephen Kelly <steveire@gmail.com>2014-10-30 23:41:53 (GMT)
committerStephen Kelly <steveire@gmail.com>2014-11-24 20:54:41 (GMT)
commit4cf5179c77237f3eb56f85eddebc43895691694c (patch)
tree4ab200eaf6c05ccd098eeb0f1101c0c6e2745c89 /Modules/WriteCompilerDetectionHeader.cmake
parent2ed0088b2abc591bb5ba6b4a13ee9997231883eb (diff)
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WCDH: Make it possible to generate multiple files.
Extend the write_compiler_detection_header interface to allow specifying a location for supplementary files, and getting the list of resulting files as a variable.
Diffstat (limited to 'Modules/WriteCompilerDetectionHeader.cmake')
-rw-r--r--Modules/WriteCompilerDetectionHeader.cmake101
1 files changed, 97 insertions, 4 deletions
diff --git a/Modules/WriteCompilerDetectionHeader.cmake b/Modules/WriteCompilerDetectionHeader.cmake
index 86137e2..6d0bfc7 100644
--- a/Modules/WriteCompilerDetectionHeader.cmake
+++ b/Modules/WriteCompilerDetectionHeader.cmake
@@ -11,6 +11,7 @@
# write_compiler_detection_header(
# FILE <file>
# PREFIX <prefix>
+# [OUTPUT_FILES_VAR <output_files_var> OUTPUT_DIR <output_dir>]
# COMPILERS <compiler> [...]
# FEATURES <feature> [...]
# [VERSION <version>]
@@ -21,6 +22,33 @@
# The ``write_compiler_detection_header`` function generates the
# file ``<file>`` with macros which all have the prefix ``<prefix>``.
#
+# By default, all content is written directly to the ``<file>``. The
+# ``OUTPUT_FILES_VAR`` may be specified to cause the compiler-specific
+# content to be written to separate files. The separate files are then
+# available in the ``<output_files_var>`` and may be consumed by the caller
+# for installation for example. The ``OUTPUT_DIR`` specifies a relative
+# path from the main ``<file>`` to the compiler-specific files. For example:
+#
+# .. code-block:: cmake
+#
+# write_compiler_detection_header(
+# FILE climbingstats_compiler_detection.h
+# PREFIX ClimbingStats
+# OUTPUT_FILES_VAR support_files
+# OUTPUT_DIR compilers
+# COMPILERS GNU Clang
+# FEATURES cxx_variadic_templates
+# )
+# install(FILES
+# ${CMAKE_CURRENT_BINARY_DIR}/climbingstats_compiler_detection.h
+# DESTINATION include
+# )
+# install(FILES
+# ${support_files}
+# DESTINATION include/compilers
+# )
+#
+#
# ``VERSION`` may be used to specify the API version to be generated.
# Future versions of CMake may introduce alternative APIs. A given
# API is selected by any ``<version>`` value greater than or equal
@@ -220,7 +248,7 @@ function(write_compiler_detection_header
message(FATAL_ERROR "write_compiler_detection_header: PREFIX parameter missing.")
endif()
set(options)
- set(oneValueArgs VERSION EPILOG PROLOG)
+ set(oneValueArgs VERSION EPILOG PROLOG OUTPUT_FILES_VAR OUTPUT_DIR)
set(multiValueArgs COMPILERS FEATURES)
cmake_parse_arguments(_WCD "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
@@ -255,6 +283,35 @@ function(write_compiler_detection_header
message(FATAL_ERROR "${err}")
endif()
+ if(_WCD_OUTPUT_FILES_VAR)
+ if(NOT _WCD_OUTPUT_DIR)
+ message(FATAL_ERROR "If OUTPUT_FILES_VAR is specified, then OUTPUT_DIR must also be specified.")
+ endif()
+ endif()
+ if(_WCD_OUTPUT_DIR)
+ if(NOT _WCD_OUTPUT_FILES_VAR)
+ message(FATAL_ERROR "If OUTPUT_DIR is specified, then OUTPUT_FILES_VAR must also be specified.")
+ endif()
+ get_filename_component(main_file_dir ${file_arg} DIRECTORY)
+ if (NOT IS_ABSOLUTE ${main_file_dir})
+ set(main_file_dir "${CMAKE_CURRENT_BINARY_DIR}/${main_file_dir}")
+ endif()
+ if (NOT IS_ABSOLUTE ${_WCD_OUTPUT_DIR})
+ set(_WCD_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/${_WCD_OUTPUT_DIR}")
+ endif()
+ get_filename_component(out_file_dir ${_WCD_OUTPUT_DIR} ABSOLUTE)
+ string(FIND ${out_file_dir} ${main_file_dir} idx)
+ if (NOT idx EQUAL 0)
+ message(FATAL_ERROR "The compiler-specific output directory must be within the same directory as the main file.")
+ endif()
+
+ if (main_file_dir STREQUAL out_file_dir)
+ unset(_WCD_OUTPUT_DIR)
+ else()
+ string(REPLACE "${main_file_dir}/" "" _WCD_OUTPUT_DIR "${out_file_dir}/")
+ endif()
+ endif()
+
set(compilers
GNU
Clang
@@ -314,6 +371,14 @@ function(write_compiler_detection_header
endforeach()
list(REMOVE_DUPLICATES _langs)
+ if(_WCD_OUTPUT_FILES_VAR)
+ get_filename_component(main_file_name ${file_arg} NAME)
+ set(compiler_file_content_
+"#ifndef ${prefix_arg}_COMPILER_DETECTION_H
+# error This file may only be included from ${main_file_name}
+#endif\n")
+ endif()
+
foreach(_lang ${_langs})
get_property(known_features GLOBAL PROPERTY CMAKE_${_lang}_KNOWN_FEATURES)
@@ -340,7 +405,19 @@ function(write_compiler_detection_header
foreach(compiler ${_WCD_COMPILERS})
_load_compiler_variables(${compiler} ${_lang} ${${_lang}_features})
set(file_content "${file_content}\n# ${pp_if} ${prefix_arg}_COMPILER_IS_${compiler}\n")
- set(file_content "${file_content}
+
+ if(_WCD_OUTPUT_FILES_VAR)
+ set(compile_file_name "${_WCD_OUTPUT_DIR}${prefix_arg}_COMPILER_INFO_${compiler}.h")
+ set(file_content "${file_content}\n# include \"${compile_file_name}\"\n")
+ endif()
+
+ if(_WCD_OUTPUT_FILES_VAR)
+ set(compiler_file_content compiler_file_content_${compiler})
+ else()
+ set(compiler_file_content file_content)
+ endif()
+
+ set(${compiler_file_content} "${${compiler_file_content}}
# if !(${_cmake_oldestSupported_${compiler}})
# error Unsupported compiler version
# endif\n")
@@ -354,7 +431,7 @@ function(write_compiler_detection_header
set(MACRO_HEX)
endif()
string(CONFIGURE "${_compiler_id_version_compute_${compiler}}" VERSION_BLOCK @ONLY)
- set(file_content "${file_content}${VERSION_BLOCK}\n")
+ set(${compiler_file_content} "${${compiler_file_content}}${VERSION_BLOCK}\n")
set(PREFIX)
set(MACRO_DEC)
set(MACRO_HEX)
@@ -370,7 +447,7 @@ function(write_compiler_detection_header
set(_define_item "\n# define ${prefix_arg}_${feature_PP} 0\n")
set(_define_item "\n# if ${_cmake_feature_test_${compiler}_${feature}}\n# define ${prefix_arg}_${feature_PP} 1\n# else${_define_item}# endif\n")
endif()
- set(file_content "${file_content}${_define_item}")
+ set(${compiler_file_content} "${${compiler_file_content}}${_define_item}")
endforeach()
endforeach()
if(pp_if STREQUAL "elif")
@@ -522,6 +599,22 @@ function(write_compiler_detection_header
endforeach()
+ if(_WCD_OUTPUT_FILES_VAR)
+ foreach(compiler ${_WCD_COMPILERS})
+ set(CMAKE_CONFIGURABLE_FILE_CONTENT "${compiler_file_content_}")
+ set(CMAKE_CONFIGURABLE_FILE_CONTENT "${CMAKE_CONFIGURABLE_FILE_CONTENT}${compiler_file_content_${compiler}}")
+
+ set(compile_file_name "${_WCD_OUTPUT_DIR}${prefix_arg}_COMPILER_INFO_${compiler}.h")
+ set(full_path "${main_file_dir}/${compile_file_name}")
+ list(APPEND ${_WCD_OUTPUT_FILES_VAR} ${full_path})
+ configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
+ "${full_path}"
+ @ONLY
+ )
+ endforeach()
+ set(${_WCD_OUTPUT_FILES_VAR} ${${_WCD_OUTPUT_FILES_VAR}} PARENT_SCOPE)
+ endif()
+
if (_WCD_EPILOG)
set(file_content "${file_content}\n${_WCD_EPILOG}\n")
endif()