| #*************************************************************************** |
| # _ _ ____ _ |
| # 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() |