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# Set compiler flags
set(CMAKE_C_STANDARD 99)
set(CMAKE_C_STANDARD_REQUIRED ON)
# analogous to AC_USE_SYSTEM_EXTENSIONS in configure.ac
add_definitions(-D_POSIX_C_SOURCE=199309L -D_GNU_SOURCE)
# copied from Autoconf's AC_SYS_LARGEFILE
if(NOT WIN32)
add_definitions(-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE)
endif(NOT WIN32)
# Set compiler flags for warnings
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
# using Clang or AppleClang
# reasonable and standard
add_compile_options_with_check(-Weverything)
add_compile_options_with_check(-Werror)
add_compile_options_with_check(-Wfatal-errors)
add_compile_options_with_check(-Wold-style-cast)
# helps catch hard to track down memory errors
add_compile_options_with_check(-Wnon-virtual-dtor)
# warn for potential performance problem casts
add_compile_options_with_check(-Wcast-align)
# warn if you overload (not override) a virtual function
add_compile_options_with_check(-Woverloaded-virtual)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
# using GCC
# reasonable and standard
add_compile_options_with_check(-Wall)
add_compile_options_with_check(-Wextra)
add_compile_options_with_check(-pedantic)
add_compile_options_with_check(-Werror)
#add_compile_options_with_check(-Wfatal-errors)
add_compile_options_with_check(-Wold-style-cast)
# helps catch hard to track down memory errors
add_compile_options_with_check(-Wnon-virtual-dtor)
# warn for potential performance problem casts
add_compile_options_with_check(-Wcast-align)
# warn if you overload (not override) a virtual function
add_compile_options_with_check(-Woverloaded-virtual)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
# using Intel C++
message(WARNING "Using of Intel C++ is not supported, you are on your own.")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
# using Visual Studio C++
# all reasonable warnings
add_compile_options_with_check(/W4)
# treat warnings as errors
add_compile_options_with_check(/Wx)
# enable warning on thread un-safe static member initialization
add_compile_options_with_check(/W44640)
endif()
# Other flags are not added directly globally, but using a function
# so later when defining targets, it can be set per target
function(add_libtsm_compile_options target)
# Make all files include "config.h" by default. This shouldn't cause any
# problems and we cannot forget to include it anymore.
target_compile_options(${target} PRIVATE
-include ${CMAKE_BINARY_DIR}/config.h
-pipe
-fno-common
-ffast-math
-fno-strict-aliasing
-ffunction-sections
-fdata-sections
)
# Linker flags
## Make the linker discard all unused symbols.
if(APPLE)
set(LDFLAGS "-Wl,-dead_strip -Wl,-dead_strip_dylibs -Wl,-bind_at_load")
elseif(UNIX)
set(LDFLAGS "-Wl,--as-needed -Wl,--gc-sections -Wl,-z,relro -Wl,-z,now")
else()
message("Unsupported platform, you are on your own.")
endif()
set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " ${LDFLAGS}")
endfunction()
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