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#
# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright © 2022 Keith Packard
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Add sources to libc, eliding any duplicate basenames
function(picolibc_sources_flags flags)
# Get current sources
get_property(current_sources_real TARGET c PROPERTY SOURCES)
get_property(current_sources_fake TARGET c PROPERTY SOURCES_FAKE)
set(current_sources ${current_sources_real} ${current_sources_fake})
set(sources ${ARGN})
foreach(source IN LISTS ARGN)
# Compare desired addition to existing sources using basenames
get_filename_component(source_base "${source}" NAME_WLE)
foreach(current IN LISTS current_sources)
get_filename_component(current_base "${current}" NAME_WLE)
if("${source_base}" STREQUAL "${current_base}")
list(REMOVE_ITEM sources "${source}")
endif()
endforeach()
endforeach()
# Add all files that aren't duplicated
target_sources(c PRIVATE ${sources})
# Set flags if specified
if(flags)
foreach(flag ${flags})
foreach(source ${sources})
set_property(SOURCE ${source}
TARGET_DIRECTORY c
APPEND PROPERTY COMPILE_OPTIONS ${flag})
endforeach()
endforeach()
endif()
endfunction()
function(picolibc_sources)
picolibc_sources_flags(0 ${ARGN})
endfunction()
function(picolibc_sources_fake)
get_property(current_sources_fake TARGET c PROPERTY SOURCES_FAKE)
list(APPEND current_sources_fake ${ARGN})
set_property(TARGET c PROPERTY SOURCES_FAKE ${current_sources_fake})
endfunction()
function(picolibc_headers subdir)
# Get current headers
get_property(current_headers GLOBAL PROPERTY PICOLIBC_HEADERS)
set(orig_headers ${ARGN})
foreach(header IN LISTS ARGN)
set(rel_header "${subdir}/${header}")
set(include 1)
foreach(current IN LISTS current_headers)
if("${rel_header}" STREQUAL "${current}")
list(REMOVE_ITEM orig_headers "${header}")
set(include 0)
endif()
endforeach()
if(include)
list(APPEND current_headers "${rel_header}")
configure_file("${header}" "${PROJECT_BINARY_DIR}/picolibc/include/${rel_header}")
endif()
endforeach()
set_property(GLOBAL PROPERTY PICOLIBC_HEADERS ${current_headers})
install(FILES ${orig_headers} DESTINATION "include/${subdir}")
endfunction()
function(_picolibc_supported_compile_options var)
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
foreach(flag ${ARGN})
string(MAKE_C_IDENTIFIER ${flag} flag_under)
try_compile(${flag_under} "${PROJECT_BINARY_DIR}"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/simple-main.c"
COMPILE_DEFINITIONS "${PICOLIBC_TEST_COMPILE_OPTIONS};${PICOLIBC_FLAG_OPTIONS};${flag}"
)
if(${${flag_under}})
list(APPEND options ${flag})
endif()
endforeach()
set(${var} ${options} PARENT_SCOPE)
endfunction()
# These flags are needed to generate errors for invalid command line flags
# instead of just warnings
_picolibc_supported_compile_options(PICOLIBC_FLAG_OPTIONS
-Werror=missing-declarations
-Werror=unknown-attributes
-Werror=attributes
-Werror=unsupported-floating-point-opt
-Werror=ignored-optimization-argument
-Werror=attribute-optimize
-Werror=implicit-function-declaration
-Wno-unused-command-line-argument
)
function(picolibc_supported_compile_options)
_picolibc_supported_compile_options(options ${ARGN})
set(PICOLIBC_COMPILE_OPTIONS ${PICOLIBC_COMPILE_OPTIONS} ${options} PARENT_SCOPE)
endfunction()
function(picolibc_flag flag)
string(REPLACE "_" "-" flag_dash ${flag})
string(REGEX REPLACE "^-" "" flag_trim ${flag_dash})
string(TOLOWER ${flag_trim} flag_lower)
set(flag_file "${CMAKE_CURRENT_SOURCE_DIR}/cmake/${flag_lower}.c")
if (NOT EXISTS "${flag_file}")
message(ERROR " Missing compiler test file ${flag_file}")
endif()
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
try_compile(${flag} "${PROJECT_BINARY_DIR}" "${flag_file}"
COMPILE_DEFINITIONS "${PICOLIBC_FLAG_OPTIONS}"
)
if (${flag})
set(${flag} ${flag} PARENT_SCOPE)
endif()
endfunction()
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