--- /dev/null
+#***************************************************************************
+# _ _ ____ _
+# 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()
projects / thirdparty / curl.git / commitdiff
