https://github.com/Kitware/CMake
Revision d9a6e0ffc82fbc460289c6b0808eff27ac316235 authored by Craig Scott on 10 September 2022, 08:22:18 UTC, committed by Craig Scott on 10 September 2022, 08:23:21 UTC
The unset() command was using __cmake_contentNameLower before that
variable was restored from the __cmake_fcCurrentVarsStack. That means
if there had been a nested call to FetchContent_MakeAvailable(), the wrong
variable name would have been cleared (the nested name instead of the
one from the current call). That would have left the variable set upon return,
blocking the dependency provider from seeing any further calls to
FetchContent_MakeAvailable() in the current variable scope or below for the
current dependency.
1 parent a2f9e67
Raw File
Tip revision: d9a6e0ffc82fbc460289c6b0808eff27ac316235 authored by Craig Scott on 10 September 2022, 08:22:18 UTC
FetchContent: Fix unsetting wrong variable name after provider returns
Tip revision: d9a6e0f
CMakeCInformation.cmake
# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.


# This file sets the basic flags for the C language in CMake.
# It also loads the available platform file for the system-compiler
# if it exists.
# It also loads a system - compiler - processor (or target hardware)
# specific file, which is mainly useful for crosscompiling and embedded systems.

include(CMakeLanguageInformation)

# some compilers use different extensions (e.g. sdcc uses .rel)
# so set the extension here first so it can be overridden by the compiler specific file
if(UNIX)
  set(CMAKE_C_OUTPUT_EXTENSION .o)
else()
  set(CMAKE_C_OUTPUT_EXTENSION .obj)
endif()

set(_INCLUDED_FILE 0)

# Load compiler-specific information.
if(CMAKE_C_COMPILER_ID)
  include(Compiler/${CMAKE_C_COMPILER_ID}-C OPTIONAL)
endif()

set(CMAKE_BASE_NAME)
get_filename_component(CMAKE_BASE_NAME "${CMAKE_C_COMPILER}" NAME_WE)
if(CMAKE_COMPILER_IS_GNUCC)
  set(CMAKE_BASE_NAME gcc)
endif()


# load a hardware specific file, mostly useful for embedded compilers
if(CMAKE_SYSTEM_PROCESSOR)
  if(CMAKE_C_COMPILER_ID)
    include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
  endif()
  if (NOT _INCLUDED_FILE)
    include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
  endif ()
endif()


# load the system- and compiler specific files
if(CMAKE_C_COMPILER_ID)
  include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C
    OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
endif()
if (NOT _INCLUDED_FILE)
  include(Platform/${CMAKE_EFFECTIVE_SYSTEM_NAME}-${CMAKE_BASE_NAME}
    OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
endif ()

# load any compiler-wrapper specific information
if (CMAKE_C_COMPILER_WRAPPER)
  __cmake_include_compiler_wrapper(C)
endif ()

# We specify the compiler information in the system file for some
# platforms, but this language may not have been enabled when the file
# was first included.  Include it again to get the language info.
# Remove this when all compiler info is removed from system files.
if (NOT _INCLUDED_FILE)
  include(Platform/${CMAKE_SYSTEM_NAME} OPTIONAL)
endif ()

if(CMAKE_C_SIZEOF_DATA_PTR)
  foreach(f ${CMAKE_C_ABI_FILES})
    include(${f})
  endforeach()
  unset(CMAKE_C_ABI_FILES)
endif()

# This should be included before the _INIT variables are
# used to initialize the cache.  Since the rule variables
# have if blocks on them, users can still define them here.
# But, it should still be after the platform file so changes can
# be made to those values.

if(CMAKE_USER_MAKE_RULES_OVERRIDE)
  # Save the full path of the file so try_compile can use it.
  include(${CMAKE_USER_MAKE_RULES_OVERRIDE} RESULT_VARIABLE _override)
  set(CMAKE_USER_MAKE_RULES_OVERRIDE "${_override}")
endif()

if(CMAKE_USER_MAKE_RULES_OVERRIDE_C)
  # Save the full path of the file so try_compile can use it.
  include(${CMAKE_USER_MAKE_RULES_OVERRIDE_C} RESULT_VARIABLE _override)
  set(CMAKE_USER_MAKE_RULES_OVERRIDE_C "${_override}")
endif()

if(CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF")
  if(NOT DEFINED CMAKE_C_LINK_WHAT_YOU_USE_FLAG)
    set(CMAKE_C_LINK_WHAT_YOU_USE_FLAG "LINKER:--no-as-needed")
  endif()
  if(NOT DEFINED CMAKE_LINK_WHAT_YOU_USE_CHECK)
    set(CMAKE_LINK_WHAT_YOU_USE_CHECK ldd -u -r)
  endif()
endif()

# for most systems a module is the same as a shared library
# so unless the variable CMAKE_MODULE_EXISTS is set just
# copy the values from the LIBRARY variables
if(NOT CMAKE_MODULE_EXISTS)
  set(CMAKE_SHARED_MODULE_C_FLAGS ${CMAKE_SHARED_LIBRARY_C_FLAGS})
  set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS ${CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS})
endif()

set(CMAKE_C_FLAGS_INIT "$ENV{CFLAGS} ${CMAKE_C_FLAGS_INIT}")

cmake_initialize_per_config_variable(CMAKE_C_FLAGS "Flags used by the C compiler")

if(CMAKE_C_STANDARD_LIBRARIES_INIT)
  set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES_INIT}"
    CACHE STRING "Libraries linked by default with all C applications.")
  mark_as_advanced(CMAKE_C_STANDARD_LIBRARIES)
endif()

if(NOT CMAKE_C_COMPILER_LAUNCHER AND DEFINED ENV{CMAKE_C_COMPILER_LAUNCHER})
  set(CMAKE_C_COMPILER_LAUNCHER "$ENV{CMAKE_C_COMPILER_LAUNCHER}"
    CACHE STRING "Compiler launcher for C.")
endif()

if(NOT CMAKE_C_LINKER_LAUNCHER AND DEFINED ENV{CMAKE_C_LINKER_LAUNCHER})
  set(CMAKE_C_LINKER_LAUNCHER "$ENV{CMAKE_C_LINKER_LAUNCHER}"
    CACHE STRING "Linker launcher for C.")
endif()

include(CMakeCommonLanguageInclude)

# now define the following rule variables

# CMAKE_C_CREATE_SHARED_LIBRARY
# CMAKE_C_CREATE_SHARED_MODULE
# CMAKE_C_COMPILE_OBJECT
# CMAKE_C_LINK_EXECUTABLE

# variables supplied by the generator at use time
# <TARGET>
# <TARGET_BASE> the target without the suffix
# <OBJECTS>
# <OBJECT>
# <LINK_LIBRARIES>
# <FLAGS>
# <LINK_FLAGS>

# C compiler information
# <CMAKE_C_COMPILER>
# <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS>
# <CMAKE_SHARED_MODULE_CREATE_C_FLAGS>
# <CMAKE_C_LINK_FLAGS>

# Static library tools
# <CMAKE_AR>
# <CMAKE_RANLIB>


# create a C shared library
if(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
  set(CMAKE_C_CREATE_SHARED_LIBRARY
      "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
endif()

# create a C shared module just copy the shared library rule
if(NOT CMAKE_C_CREATE_SHARED_MODULE)
  set(CMAKE_C_CREATE_SHARED_MODULE ${CMAKE_C_CREATE_SHARED_LIBRARY})
endif()

# Create a static archive incrementally for large object file counts.
# If CMAKE_C_CREATE_STATIC_LIBRARY is set it will override these.
if(NOT DEFINED CMAKE_C_ARCHIVE_CREATE)
  set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> qc <TARGET> <LINK_FLAGS> <OBJECTS>")
endif()
if(NOT DEFINED CMAKE_C_ARCHIVE_APPEND)
  set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> q <TARGET> <LINK_FLAGS> <OBJECTS>")
endif()
if(NOT DEFINED CMAKE_C_ARCHIVE_FINISH)
  set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
endif()

# compile a C file into an object file
if(NOT CMAKE_C_COMPILE_OBJECT)
  set(CMAKE_C_COMPILE_OBJECT
    "<CMAKE_C_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -o <OBJECT> -c <SOURCE>")
endif()

if(NOT CMAKE_C_LINK_EXECUTABLE)
  set(CMAKE_C_LINK_EXECUTABLE
    "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
endif()

if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG)
  set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG})
endif()

if(NOT CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP)
  set(CMAKE_EXECUTABLE_RUNTIME_C_FLAG_SEP ${CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP})
endif()

if(NOT CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG)
  set(CMAKE_EXECUTABLE_RPATH_LINK_C_FLAG ${CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG})
endif()

set(CMAKE_C_INFORMATION_LOADED 1)
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