198 lines
8.3 KiB
CMake
198 lines
8.3 KiB
CMake
#***************************************************************************
|
|
# _ _ ____ _
|
|
# Project ___| | | | _ \| |
|
|
# / __| | | | |_) | |
|
|
# | (__| |_| | _ <| |___
|
|
# \___|\___/|_| \_\_____|
|
|
#
|
|
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
#
|
|
# This software is licensed as described in the file COPYING, which
|
|
# you should have received as part of this distribution. The terms
|
|
# are also available at https://curl.se/docs/copyright.html.
|
|
#
|
|
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
# copies of the Software, and permit persons to whom the Software is
|
|
# furnished to do so, under the terms of the COPYING file.
|
|
#
|
|
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
# KIND, either express or implied.
|
|
#
|
|
# SPDX-License-Identifier: curl
|
|
#
|
|
###########################################################################
|
|
include(CheckCCompilerFlag)
|
|
|
|
if(PICKY_COMPILER)
|
|
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
|
|
|
|
# https://clang.llvm.org/docs/DiagnosticsReference.html
|
|
# https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
|
|
|
|
# WPICKY_ENABLE = Options we want to enable as-is.
|
|
# WPICKY_DETECT = Options we want to test first and enable if available.
|
|
|
|
# Prefer the -Wextra alias with clang.
|
|
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
|
|
set(WPICKY_ENABLE "-Wextra")
|
|
else()
|
|
set(WPICKY_ENABLE "-W")
|
|
endif()
|
|
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wall -pedantic
|
|
)
|
|
|
|
# ----------------------------------
|
|
# Add new options here, if in doubt:
|
|
# ----------------------------------
|
|
set(WPICKY_DETECT
|
|
)
|
|
|
|
# Assume these options always exist with both clang and gcc.
|
|
# Require clang 3.0 / gcc 2.95 or later.
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wbad-function-cast # clang 3.0 gcc 2.95
|
|
-Wconversion # clang 3.0 gcc 2.95
|
|
-Winline # clang 1.0 gcc 1.0
|
|
-Wmissing-declarations # clang 1.0 gcc 2.7
|
|
-Wmissing-prototypes # clang 1.0 gcc 1.0
|
|
-Wnested-externs # clang 1.0 gcc 2.7
|
|
-Wno-long-long # clang 1.0 gcc 2.95
|
|
-Wno-multichar # clang 1.0 gcc 2.95
|
|
-Wpointer-arith # clang 1.0 gcc 1.4
|
|
-Wshadow # clang 1.0 gcc 2.95
|
|
-Wsign-compare # clang 1.0 gcc 2.95
|
|
-Wundef # clang 1.0 gcc 2.95
|
|
-Wunused # clang 1.1 gcc 2.95
|
|
-Wwrite-strings # clang 1.0 gcc 1.4
|
|
)
|
|
|
|
# Always enable with clang, version dependent with gcc
|
|
set(WPICKY_COMMON_OLD
|
|
-Wcast-align # clang 1.0 gcc 4.2
|
|
-Wdeclaration-after-statement # clang 1.0 gcc 3.4
|
|
-Wempty-body # clang 3.0 gcc 4.3
|
|
-Wendif-labels # clang 1.0 gcc 3.3
|
|
-Wfloat-equal # clang 1.0 gcc 2.96 (3.0)
|
|
-Wignored-qualifiers # clang 3.0 gcc 4.3
|
|
-Wno-format-nonliteral # clang 1.0 gcc 2.96 (3.0)
|
|
-Wno-sign-conversion # clang 3.0 gcc 4.3
|
|
-Wno-system-headers # clang 1.0 gcc 3.0
|
|
-Wstrict-prototypes # clang 1.0 gcc 3.3
|
|
-Wtype-limits # clang 3.0 gcc 4.3
|
|
-Wvla # clang 2.8 gcc 4.3
|
|
)
|
|
|
|
set(WPICKY_COMMON
|
|
-Wdouble-promotion # clang 3.6 gcc 4.6 appleclang 6.3
|
|
-Wenum-conversion # clang 3.2 gcc 10.0 appleclang 4.6 g++ 11.0
|
|
-Wunused-const-variable # clang 3.4 gcc 6.0 appleclang 5.1
|
|
)
|
|
|
|
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
|
|
list(APPEND WPICKY_ENABLE
|
|
${WPICKY_COMMON_OLD}
|
|
-Wshift-sign-overflow # clang 2.9
|
|
-Wshorten-64-to-32 # clang 1.0
|
|
)
|
|
# Enable based on compiler version
|
|
if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.6) OR
|
|
(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.3))
|
|
list(APPEND WPICKY_ENABLE
|
|
${WPICKY_COMMON}
|
|
)
|
|
endif()
|
|
if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.9) OR
|
|
(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.3))
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wcomma # clang 3.9 appleclang 8.3
|
|
-Wmissing-variable-declarations # clang 3.2 appleclang 4.6
|
|
)
|
|
endif()
|
|
if((CMAKE_C_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 7.0) OR
|
|
(CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 10.3))
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wassign-enum # clang 7.0 appleclang 10.3
|
|
-Wextra-semi-stmt # clang 7.0 appleclang 10.3
|
|
)
|
|
endif()
|
|
else() # gcc
|
|
list(APPEND WPICKY_DETECT
|
|
${WPICKY_COMMON}
|
|
)
|
|
# Enable based on compiler version
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.3)
|
|
list(APPEND WPICKY_ENABLE
|
|
${WPICKY_COMMON_OLD}
|
|
-Wmissing-parameter-type # gcc 4.3
|
|
-Wold-style-declaration # gcc 4.3
|
|
-Wstrict-aliasing=3 # gcc 4.0
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5 AND MINGW)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wno-pedantic-ms-format # gcc 4.5 (mingw-only)
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wformat=2 # clang 3.0 gcc 4.8 (clang part-default, enabling it fully causes -Wformat-nonliteral warnings)
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Warray-bounds=2 -ftree-vrp # clang 3.0 gcc 5.0 (clang default: -Warray-bounds)
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 6.0)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Wduplicated-cond # gcc 6.0
|
|
-Wnull-dereference # clang 3.0 gcc 6.0 (clang default)
|
|
-fdelete-null-pointer-checks
|
|
-Wshift-negative-value # clang 3.7 gcc 6.0 (clang default)
|
|
-Wshift-overflow=2 # clang 3.0 gcc 6.0 (clang default: -Wshift-overflow)
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 7.0)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Walloc-zero # gcc 7.0
|
|
-Wduplicated-branches # gcc 7.0
|
|
-Wformat-overflow=2 # gcc 7.0
|
|
-Wformat-truncation=1 # gcc 7.0
|
|
-Wrestrict # gcc 7.0
|
|
)
|
|
endif()
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 10.0)
|
|
list(APPEND WPICKY_ENABLE
|
|
-Warith-conversion # gcc 10.0
|
|
)
|
|
endif()
|
|
endif()
|
|
|
|
#
|
|
|
|
unset(WPICKY)
|
|
|
|
foreach(_CCOPT ${WPICKY_ENABLE})
|
|
set(WPICKY "${WPICKY} ${_CCOPT}")
|
|
endforeach()
|
|
|
|
foreach(_CCOPT ${WPICKY_DETECT})
|
|
# surprisingly, CHECK_C_COMPILER_FLAG needs a new variable to store each new
|
|
# test result in.
|
|
string(MAKE_C_IDENTIFIER "OPT${_CCOPT}" _optvarname)
|
|
# GCC only warns about unknown -Wno- options if there are also other diagnostic messages,
|
|
# so test for the positive form instead
|
|
string(REPLACE "-Wno-" "-W" _CCOPT_ON "${_CCOPT}")
|
|
check_c_compiler_flag(${_CCOPT_ON} ${_optvarname})
|
|
if(${_optvarname})
|
|
set(WPICKY "${WPICKY} ${_CCOPT}")
|
|
endif()
|
|
endforeach()
|
|
|
|
message(STATUS "Picky compiler options:${WPICKY}")
|
|
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WPICKY}")
|
|
endif()
|
|
endif()
|