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Merge pull request #617 from besser82/topic/besser82/option_disable_tls

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Add an option to disable the use of thread-local storage.
This commit is contained in:
Eric Hawicz
2020-05-18 10:25:54 -04:00
committed by GitHub
parent 5b15c7567d a85d2395ff
commit a8a0590921
3 changed files with 26 additions and 21 deletions
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25
CMakeLists.txt
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@@ -83,10 +83,11 @@ COMMAND make package_source
)
# Enable or disable features. By default, all features are turned off.
option(ENABLE_RDRAND "Enable RDRAND Hardware RNG Hash Seed" OFF)
option(ENABLE_THREADING "Enable partial threading support." OFF)
option(DISABLE_WERROR "Avoid treating compiler warnings as fatal errors" OFF)
option(DISABLE_BSYMBOLIC "Avoid linking with -Bsymbolic-function" OFF)
option(DISABLE_BSYMBOLIC "Avoid linking with -Bsymbolic-function." OFF)
option(DISABLE_THREAD_LOCAL_STORAGE "Disable using Thread-Local Storage (HAVE___THREAD)." OFF)
option(DISABLE_WERROR "Avoid treating compiler warnings as fatal errors." OFF)
option(ENABLE_RDRAND "Enable RDRAND Hardware RNG Hash Seed." OFF)
option(ENABLE_THREADING "Enable partial threading support." OFF)
if (UNIX OR MINGW OR CYGWIN)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
@@ -217,14 +218,16 @@ check_c_source_compiles(
"int main() { int i, x = 0; i = __sync_add_and_fetch(&x,1); return x; }"
HAVE_ATOMIC_BUILTINS)
check_c_source_compiles(
"__thread int x = 0; int main() { return 0; }"
HAVE___THREAD)
if (NOT DISABLE_THREAD_LOCAL_STORAGE)
check_c_source_compiles(
"__thread int x = 0; int main() { return 0; }"
HAVE___THREAD)
if (HAVE___THREAD)
set(SPEC___THREAD __thread)
elseif (MSVC)
set(SPEC___THREAD __declspec(thread))
if (HAVE___THREAD)
set(SPEC___THREAD __thread)
elseif (MSVC)
set(SPEC___THREAD __declspec(thread))
endif()
endif()
# Hardware random number is not available on Windows? Says, config.h.win32. Best to preserve compatibility.

21
README.md
View File

@@ -93,16 +93,17 @@ CMake Options <a name="CMake"></a>
The json-c library is built with [CMake](https://cmake.org/cmake-tutorial/),
which can take a few options.
Variable | Type | Description
---------------------|--------|--------------
CMAKE_INSTALL_PREFIX | String | The install location.
CMAKE_BUILD_TYPE | String | Defaults to "debug"
BUILD_SHARED_LIBS | Bool | The default build generates a dynamic (dll/so) library. Set this to OFF to create a static library only.
BUILD_STATIC_LIBS | Bool | The default build generates a static (lib/a) library. Set this to OFF to create a shared library only.
ENABLE_RDRAND | Bool | Enable RDRAND Hardware RNG Hash Seed
ENABLE_THREADING | Bool | Enable partial threading support
DISABLE_WERROR | Bool | Disable use of -Werror
DISABLE_BSYMBOLIC | Bool | Disable use of -Bsymbolic-functions
Variable | Type | Description
-----------------------------|--------|--------------
CMAKE_INSTALL_PREFIX | String | The install location.
CMAKE_BUILD_TYPE | String | Defaults to "debug".
BUILD_SHARED_LIBS | Bool | The default build generates a dynamic (dll/so) library. Set this to OFF to create a static library only.
BUILD_STATIC_LIBS | Bool | The default build generates a static (lib/a) library. Set this to OFF to create a shared library only.
DISABLE_BSYMBOLIC | Bool | Disable use of -Bsymbolic-functions.
DISABLE_THREAD_LOCAL_STORAGE | Bool | Disable use of Thread-Local Storage (HAVE___THREAD).
DISABLE_WERROR | Bool | Disable use of -Werror.
ENABLE_RDRAND | Bool | Enable RDRAND Hardware RNG Hash Seed.
ENABLE_THREADING | Bool | Enable partial threading support.
Pass these options as `-D` on CMake's command-line.

1
tests/test_double_serializer.c
View File

@@ -59,6 +59,7 @@ int main()
#else
// Just fake it up, so the output matches.
printf("obj.to_string(with thread format)=%s\n", "T0.52X");
printf("obj.to_string(long thread format)=%s\n", "Ttttttttttttt0.52xxxxxxxxxxxxxxxxxxX");
printf("obj.to_string(back to global format)=%s\n", "x0.524y");
#endif
if (json_c_set_serialization_double_format(NULL, JSON_C_OPTION_GLOBAL) < 0)