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cmake: merge CURL_WERROR logic into PickyWarnings.cmake

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Safe to do this now, as the code no longer relies on setting these
options after feature detection.

Also: Tidy up the way we handle options not to be passed to feature
checks, and make sure to show them in the configure log.

Follow-up to e86542038d #17047
Closes #17062
This commit is contained in:
Viktor Szakats 2025-04-15 13:12:35 +02:00
parent 00e8ebf567
commit 01c429c4a8
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GPG key ID: B5ABD165E2AEF201
2 changed files with 31 additions and 27 deletions
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50
CMake/PickyWarnings.cmake
View file

@ -24,13 +24,21 @@
include(CheckCCompilerFlag)
set(_picky "")
set(_picky_nocheck "") # not to pass to feature checks
if(CURL_WERROR AND
((CMAKE_C_COMPILER_ID STREQUAL "GNU" AND
NOT DOS AND # Watt-32 headers use the '#include_next' GCC extension
CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 5.0) OR
CMAKE_C_COMPILER_ID MATCHES "Clang"))
list(APPEND _picky "-pedantic-errors")
if(CURL_WERROR)
if(MSVC)
list(APPEND _picky_nocheck "-WX")
else() # llvm/clang and gcc style options
list(APPEND _picky_nocheck "-Werror")
endif()
if((CMAKE_C_COMPILER_ID STREQUAL "GNU" AND
NOT DOS AND # Watt-32 headers use the '#include_next' GCC extension
CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 5.0) OR
CMAKE_C_COMPILER_ID MATCHES "Clang")
list(APPEND _picky_nocheck "-pedantic-errors")
endif()
endif()
if(APPLE AND
@ -44,6 +52,7 @@ if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
endif()
if(MSVC)
# Use the highest warning level for Visual Studio.
string(REGEX REPLACE "[/-]W[0-4]" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
list(APPEND _picky "-W4")
elseif(BORLAND)
@ -278,25 +287,28 @@ endif()
if(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND MSVC)
list(APPEND _picky "-Wno-language-extension-token") # Allow __int64
set(_picky_tmp "")
foreach(_ccopt IN LISTS _picky)
# Prefix -Wall, otherwise clang-cl interprets it as an MSVC option and translates it to -Weverything
if(_ccopt MATCHES "^-W" AND NOT _ccopt STREQUAL "-Wall")
list(APPEND _picky_tmp ${_ccopt})
else()
list(APPEND _picky_tmp "-clang:${_ccopt}")
endif()
foreach(_wlist IN ITEMS _picky_nocheck _picky)
set(_picky_tmp "")
foreach(_ccopt IN LISTS "${_wlist}")
# Prefix -Wall, otherwise clang-cl interprets it as an MSVC option and translates it to -Weverything
if(_ccopt MATCHES "^-W" AND NOT _ccopt STREQUAL "-Wall")
list(APPEND _picky_tmp ${_ccopt})
else()
list(APPEND _picky_tmp "-clang:${_ccopt}")
endif()
endforeach()
set("${_wlist}" ${_picky_tmp})
endforeach()
set(_picky ${_picky_tmp})
endif()
if(_picky)
string(REPLACE ";" " " _picky_tmp "${_picky}")
if(_picky_nocheck OR _picky)
set(_picky_tmp "${_picky_nocheck}" "${_picky}")
string(REPLACE ";" " " _picky_tmp "${_picky_tmp}")
string(STRIP "${_picky_tmp}" _picky_tmp)
message(STATUS "Picky compiler options: ${_picky_tmp}")
set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "${_picky}")
set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "${_picky_nocheck}" "${_picky}")
# Apply to all feature checks
list(REMOVE_ITEM _picky "-pedantic-errors") # Must not pass to feature checks
string(REPLACE ";" " " _picky_tmp "${_picky}")
string(APPEND CMAKE_REQUIRED_FLAGS " ${_picky_tmp}")

8
CMakeLists.txt
View file

@ -2009,14 +2009,6 @@ if(CMAKE_C_COMPILER_ID STREQUAL "MSVC") # MSVC but exclude clang-cl
set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "-MP") # Parallel compilation
endif()
if(CURL_WERROR)
if(MSVC)
set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "-WX")
else()
set_property(DIRECTORY APPEND PROPERTY COMPILE_OPTIONS "-Werror") # This assumes clang or gcc style options
endif()
endif()
if(CURL_LTO)
if(CMAKE_VERSION VERSION_LESS 3.9)
message(FATAL_ERROR "LTO has been requested, but your cmake version ${CMAKE_VERSION} is to old. You need at least 3.9")