Commit 5ec8064b authored by Brad King's avatar Brad King Committed by Kitware Robot

Merge topic 'FindFLEX-DEFINES_FILE'

4565a2e1 Help: Add notes for topic 'FindFLEX-DEFINES_FILE'
db3d8505 FindFLEX: Add a DEFINES_FILE option to specify flex-generated header (#15781)
c26ff8a9 FindFLEX: Fix typo in ADD_FLEX_BISON_DEPENDENCY errors
30710b8d FindFLEX: Use CMAKE_PARSE_ARGUMENTS to parse arguments
parents 1fcc01f2 4565a2e1
FindFLEX-DEFINES_FILE
---------------------
* The :module:`FindFLEX` module ``FLEX_TARGET`` macro learned a
new ``DEFINES_FILE`` option to specify a custom output header
to be generated.
......@@ -27,13 +27,17 @@
#
# ::
#
# FLEX_TARGET(Name FlexInput FlexOutput [COMPILE_FLAGS <string>])
# FLEX_TARGET(Name FlexInput FlexOutput
# [COMPILE_FLAGS <string>]
# [DEFINES_FILE <string>]
# )
#
# which creates a custom command to generate the <FlexOutput> file from
# the <FlexInput> file. If COMPILE_FLAGS option is specified, the next
# parameter is added to the flex command line. Name is an alias used to
# get details of this custom command. Indeed the macro defines the
# following variables:
# parameter is added to the flex command line. If flex is configured to
# output a header file, the DEFINES_FILE option may be used to specify its
# name. Name is an alias used to get details of this custom command.
# Indeed the macro defines the following variables:
#
# ::
#
......@@ -41,6 +45,7 @@
# FLEX_${Name}_OUTPUTS - the source file generated by the custom rule, an
# alias for FlexOutput
# FLEX_${Name}_INPUT - the flex source file, an alias for ${FlexInput}
# FLEX_${Name}_OUTPUT_HEADER - the header flex output, if any.
#
#
#
......@@ -113,6 +118,8 @@ find_path(FLEX_INCLUDE_DIR FlexLexer.h
mark_as_advanced(FL_LIBRARY FLEX_INCLUDE_DIR)
include(${CMAKE_CURRENT_LIST_DIR}/CMakeParseArguments.cmake)
set(FLEX_INCLUDE_DIRS ${FLEX_INCLUDE_DIR})
set(FLEX_LIBRARIES ${FL_LIBRARY})
......@@ -145,31 +152,55 @@ if(FLEX_EXECUTABLE)
#============================================================
#
macro(FLEX_TARGET Name Input Output)
set(FLEX_TARGET_usage "FLEX_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
if(${ARGC} GREATER 3)
if(${ARGC} EQUAL 5)
if("${ARGV3}" STREQUAL "COMPILE_FLAGS")
set(FLEX_EXECUTABLE_opts "${ARGV4}")
separate_arguments(FLEX_EXECUTABLE_opts)
else()
message(SEND_ERROR ${FLEX_TARGET_usage})
endif()
set(FLEX_TARGET_outputs "${Output}")
set(FLEX_EXECUTABLE_opts "")
set(FLEX_TARGET_PARAM_OPTIONS)
set(FLEX_TARGET_PARAM_ONE_VALUE_KEYWORDS
COMPILE_FLAGS
DEFINES_FILE
)
set(FLEX_TARGET_PARAM_MULTI_VALUE_KEYWORDS)
cmake_parse_arguments(
FLEX_TARGET_ARG
"${FLEX_TARGET_PARAM_OPTIONS}"
"${FLEX_TARGET_PARAM_ONE_VALUE_KEYWORDS}"
"${FLEX_TARGET_MULTI_VALUE_KEYWORDS}"
${ARGN}
)
set(FLEX_TARGET_usage "FLEX_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>] [DEFINES_FILE <string>]")
if(NOT "${FLEX_TARGET_ARG_UNPARSED_ARGUMENTS}" STREQUAL "")
message(SEND_ERROR ${FLEX_TARGET_usage})
else()
if(NOT "${FLEX_TARGET_ARG_COMPILE_FLAGS}" STREQUAL "")
set(FLEX_EXECUTABLE_opts "${FLEX_TARGET_ARG_COMPILE_FLAGS}")
separate_arguments(FLEX_EXECUTABLE_opts)
endif()
if(NOT "${FLEX_TARGET_ARG_DEFINES_FILE}" STREQUAL "")
list(APPEND FLEX_TARGET_outputs "${FLEX_TARGET_ARG_DEFINES_FILE}")
list(APPEND FLEX_EXECUTABLE_opts --header-file=${FLEX_TARGET_ARG_DEFINES_FILE})
endif()
add_custom_command(OUTPUT ${FLEX_TARGET_outputs}
COMMAND ${FLEX_EXECUTABLE}
ARGS ${FLEX_EXECUTABLE_opts} -o${Output} ${Input}
DEPENDS ${Input}
COMMENT "[FLEX][${Name}] Building scanner with flex ${FLEX_VERSION}"
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
set(FLEX_${Name}_DEFINED TRUE)
set(FLEX_${Name}_OUTPUTS ${Output})
set(FLEX_${Name}_INPUT ${Input})
set(FLEX_${Name}_COMPILE_FLAGS ${FLEX_EXECUTABLE_opts})
if("${FLEX_TARGET_ARG_DEFINES_FILE}" STREQUAL "")
set(FLEX_${Name}_OUTPUT_HEADER "")
else()
message(SEND_ERROR ${FLEX_TARGET_usage})
set(FLEX_${Name}_OUTPUT_HEADER ${FLEX_TARGET_ARG_DEFINES_FILE})
endif()
endif()
add_custom_command(OUTPUT ${Output}
COMMAND ${FLEX_EXECUTABLE}
ARGS ${FLEX_EXECUTABLE_opts} -o${Output} ${Input}
DEPENDS ${Input}
COMMENT "[FLEX][${Name}] Building scanner with flex ${FLEX_VERSION}"
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
set(FLEX_${Name}_DEFINED TRUE)
set(FLEX_${Name}_OUTPUTS ${Output})
set(FLEX_${Name}_INPUT ${Input})
set(FLEX_${Name}_COMPILE_FLAGS ${FLEX_EXECUTABLE_opts})
endmacro()
#============================================================
......@@ -181,11 +212,11 @@ if(FLEX_EXECUTABLE)
macro(ADD_FLEX_BISON_DEPENDENCY FlexTarget BisonTarget)
if(NOT FLEX_${FlexTarget}_OUTPUTS)
message(SEND_ERROR "Flex target `${FlexTarget}' does not exists.")
message(SEND_ERROR "Flex target `${FlexTarget}' does not exist.")
endif()
if(NOT BISON_${BisonTarget}_OUTPUT_HEADER)
message(SEND_ERROR "Bison target `${BisonTarget}' does not exists.")
message(SEND_ERROR "Bison target `${BisonTarget}' does not exist.")
endif()
set_source_files_properties(${FLEX_${FlexTarget}_OUTPUTS}
......
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