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include(CheckCCompilerFlag)
if(MSVC)
add_compile_options(/FS)
add_compile_definitions(_CRT_SECURE_NO_WARNINGS) # necessary to compile for UWP
endif()
if(NOT MSVC)
# Even though we will later use 'no-unknown-warning-option', we perform the test for
# 'unknown-warning-option', without the 'no-' prefix. This is necessary because GCC
# will accept any warning option starting with 'no-', and will not error, yet it still
# prints a message about the unrecognized option.
check_c_compiler_flag("-Wunknown-warning-option" COMPILER_SUPPORTS_UNKNOWN_WARNING_OPTION_FLAG)
endif()
set(
IGRAPH_WARNINGS_AS_ERRORS ON CACHE BOOL
"Treat warnings as errors with GCC-like compilers"
)
option(FORCE_COLORED_OUTPUT "Always produce ANSI-colored output (GNU/Clang only)." FALSE)
if(FORCE_COLORED_OUTPUT)
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
add_compile_options(-fdiagnostics-color=always)
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
add_compile_options(-fcolor-diagnostics)
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
add_compile_options(-fcolor-diagnostics)
endif()
endif()
macro(use_all_warnings TARGET_NAME)
if(MSVC)
target_compile_options(${TARGET_NAME} PRIVATE
/W4 # enable most warnings, then disable:
/wd4244 # 'conversion' conversion from 'type1' to 'type2', possible loss of data
/wd4267 # 'var' : conversion from 'size_t' to 'type', possible loss of data
/wd4996 # deprecated functions, e.g. 'sprintf': This function or variable may be unsafe. Consider using sprintf_s instead.
/wd4456 # declaration of 'identifier' hides previous local declaration
/wd4800 # forcing value to 'true' or 'false' (performance warning)
/wd4204 # nonstandard extension used: non-constant aggregate initializer
/wd4701 # potentially uninitialized local variable
/wd4054 # 'type cast': from function pointer '...' to data pointer 'void *'
/wd4055 # from data pointer 'void *' to function pointer '...'
/wd4221 # nonstandard extension used: '...': cannot be initialized using address of automatic variable '...'
)
else()
target_compile_options(${TARGET_NAME} PRIVATE
# GCC-style compilers:
$<$<C_COMPILER_ID:GCC,Clang,AppleClang,Intel,IntelLLVM>:
$<$<BOOL:${IGRAPH_WARNINGS_AS_ERRORS}>:-Werror>
-Wall -Wextra -pedantic
-Wstrict-prototypes
-Wno-unused-function -Wno-unused-parameter -Wno-unused-but-set-variable -Wno-sign-compare
>
$<$<BOOL:${COMPILER_SUPPORTS_UNKNOWN_WARNING_OPTION_FLAG}>:-Wno-unknown-warning-option>
# Intel compiler:
$<$<C_COMPILER_ID:Intel>:
# disable #279: controlling expression is constant; affecting assert(condition && "message")
# disable #592: variable "var" is used before its value is set; affecting IGRAPH_UNUSED
-wd279 -wd592 -diag-disable=remark
>
# Intel LLVM:
$<$<C_COMPILER_ID:IntelLLVM>:
-fp-model=precise # The default 'fast' mode is not compatible with igraph's extensive use of NaN/Inf
>
)
endif()
endmacro()
# Helper function to add preprocesor definition of IGRAPH_FILE_BASENAME
# to pass the filename without directory path for debugging use.
#
# Example:
#
# define_file_basename_for_sources(my_target)
#
# Will add -DIGRAPH_FILE_BASENAME="filename" for each source file depended
# on by my_target, where filename is the name of the file.
#
# Source: https://stackoverflow.com/a/27990434/156771
function(define_file_basename_for_sources targetname)
get_target_property(source_files "${targetname}" SOURCES)
get_target_property(source_dir "${targetname}" SOURCE_DIR)
foreach(sourcefile ${source_files})
# Turn relative paths into absolute
get_filename_component(source_full_path "${sourcefile}" ABSOLUTE BASE_DIR "${source_dir}")
# Figure out whether the relative path from the source or the build folder
# is shorter
file(RELATIVE_PATH source_rel_path "${PROJECT_SOURCE_DIR}" "${source_full_path}")
file(RELATIVE_PATH binary_rel_path "${PROJECT_BINARY_DIR}" "${source_full_path}")
string(LENGTH "${source_rel_path}" source_rel_path_length)
string(LENGTH "${binary_rel_path}" binary_rel_path_length)
if(binary_rel_path_length LESS source_rel_path_length)
set(basename "${binary_rel_path}")
else()
set(basename "${source_rel_path}")
endif()
# Add the IGRAPH_FILE_BASENAME=filename compile definition to the source file
set_property(
SOURCE "${sourcefile}" APPEND
PROPERTY COMPILE_DEFINITIONS "IGRAPH_FILE_BASENAME=\"${basename}\""
)
endforeach()
endfunction()
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