Describe the bug The websocket_server sample application fails to build with conflicting types errors on pthread-related types when compiled with CONFIG_NEWLIB_LIBC.

I originally discovered this problem when working on a custom C++ application, where newlib was used to get some of the C++ standard library. However, the issue can be readily reproduced using the websocket server sample, as long as the libc_extension.c is removed from CMakeLists.txt.

To Reproduce Steps to reproduce the behavior:

Modify the websocket server sample to enable CONFIG_NEWLIB_LIBC, and remove the libc_extension.c file:


diff --git a/samples/net/civetweb/websocket_server/CMakeLists.txt b/samples/net/civetweb/websocket_server/CMakeLists.txt
index 022e360762..0cf01f8c90 100644
--- a/samples/net/civetweb/websocket_server/CMakeLists.txt
+++ b/samples/net/civetweb/websocket_server/CMakeLists.txt
@@ -23,7 +23,7 @@ project(civetweb_websocket_server)

target_sources(app PRIVATE
            ${src_dir}/main.c
-               ${common_src_dir}/libc_extensions.c
            ${src_dir}/http_server_handlers.c
            ${src_dir}/websocket_server_handlers.c)

diff --git a/samples/net/civetweb/websocket_server/prj.conf b/samples/net/civetweb/websocket_server/prj.conf index b582bdd921..771d45164a 100644 --- a/samples/net/civetweb/websocket_server/prj.conf +++ b/samples/net/civetweb/websocket_server/prj.conf @@ -1,6 +1,8 @@

General config

CONFIG_CIVETWEB=y

+CONFIG_NEWLIB_LIBC=y +

pthreads

CONFIG_POSIX_API=y CONFIG_PTHREAD_IPC=y

2. Try to build the sample application with west:
`west build samples/net/civetweb/websocket_server/ -b nucleo_f767zi --build-dir build/`

**Expected behavior**
The build should succeed.

**Impact**
Our application uses code that relies on the C++ standard libary (std::string, std::chrono), so disabling newlib is hence not really an option. This hence means that Zephyr's Civetweb implementation is unusable.

**Logs and console output**
The full build log is this on Ubuntu 20.04 with Zephyr SDK 0.13.1:

-- west build: generating a build system Including boilerplate (Zephyr base): /home/username/Projects/subseadisplay/zephyr/cmake/app/boilerplate.cmake CMake Deprecation Warning at /home/username/Projects/subseadisplay/zephyr/cmake/app/boilerplate.cmake:37 (cmake_policy): The OLD behavior for policy CMP0079 will be removed from a future version of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all policies are deprecated and that a policy should be set to OLD only under specific short-term circumstances. Projects should be ported to the NEW behavior and not rely on setting a policy to OLD. Call Stack (most recent call first): /home/username/Projects/subseadisplay/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:24 (include) /home/username/Projects/subseadisplay/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:35 (include_boilerplate) CMakeLists.txt:21 (find_package)

-- Application: /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server -- Zephyr version: 2.7.0-rc1 (/home/username/Projects/subseadisplay/zephyr), build: v2.7.0-rc1-151-g81595ed4db20 -- Found Python3: /home/username/zephyr-venv/bin/python3 (found suitable exact version "3.8.10") found components: Interpreter -- Found west (found suitable version "0.11.1", minimum required is "0.7.1") -- Board: nucleo_f767zi -- Cache files will be written to: /home/username/.cache/zephyr -- ZEPHYR_TOOLCHAIN_VARIANT not set, trying to locate Zephyr SDK -- Using toolchain: zephyr 0.13.1 (/opt/zephyr-sdk-0.13.1) -- Found dtc: /opt/zephyr-sdk-0.13.1/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.6.0", minimum required is "1.4.6") -- Found BOARD.dts: /home/username/Projects/subseadisplay/zephyr/boards/arm/nucleo_f767zi/nucleo_f767zi.dts -- Generated zephyr.dts: /home/username/Projects/subseadisplay/zephyr/build/zephyr/zephyr.dts -- Generated devicetree_unfixed.h: /home/username/Projects/subseadisplay/zephyr/build/zephyr/include/generated/devicetree_unfixed.h -- Generated device_extern.h: /home/username/Projects/subseadisplay/zephyr/build/zephyr/include/generated/device_extern.h -- Including generated dts.cmake file: /home/username/Projects/subseadisplay/zephyr/build/zephyr/dts.cmake

warning: MINIMAL_LIBC_MALLOC_ARENA_SIZE (defined at lib/libc/Kconfig:124) was assigned the value '16384' but got the value ''. Check these unsatisfied dependencies: MINIMAL_LIBC_MALLOC (=n), MINIMAL_LIBC (=n). See http://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE.html and/or look up MINIMAL_LIBC_MALLOC_ARENA_SIZE in the menuconfig/guiconfig interface. The Application Development Primer, Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be helpful too.

Parsing /home/username/Projects/subseadisplay/zephyr/Kconfig Loaded configuration '/home/username/Projects/subseadisplay/zephyr/boards/arm/nucleo_f767zi/nucleo_f767zi_defconfig' Merged configuration '/home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/prj.conf' Configuration saved to '/home/username/Projects/subseadisplay/zephyr/build/zephyr/.config' Kconfig header saved to '/home/username/Projects/subseadisplay/zephyr/build/zephyr/include/generated/autoconf.h' -- The C compiler identification is GNU 10.3.0 -- The CXX compiler identification is GNU 10.3.0 -- The ASM compiler identification is GNU -- Found assembler: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc -- Target architecture - arm CMake Warning (dev) at /snap/cmake/936/share/cmake-3.21/Modules/GNUInstallDirs.cmake:236 (message): Unable to determine default CMAKE_INSTALL_LIBDIR directory because no target architecture is known. Please enable at least one language before including GNUInstallDirs. Call Stack (most recent call first): /home/username/Projects/subseadisplay/modules/lib/civetweb/CMakeLists.txt:53 (include) This warning is for project developers. Use -Wno-dev to suppress it.

-- Enabling tests in the build - ON -- Thread Stack Size - 102400 -- Enabling server executable - ON -- Serve no static files - OFF -- Disable CGI support - OFF -- Disable caching support - OFF -- C++ wrappers - OFF -- IP Version 6 - OFF -- Websockets support - ON -- Server statistics support - OFF -- Memory Debugging - OFF -- ASAN in debug mode - ON -- Force x32 / x64 architecture - OFF -- Lua CGI support - OFF -- Executable installation - ON -- Build if there are warnings - ON -- Duktape CGI support - OFF -- SSL support - ON -- Compile for OpenSSL 1.1 API - OFF -- Dynamically load SSL libraries - ON -- Configuring C Compiler -- Performing Test HAVE_C_FLAG_STD_C11 -- Performing Test HAVE_C_FLAG_STD_C11 - Failed -- Performing Test HAVE_C_FLAG_STD_C99 -- Performing Test HAVE_C_FLAG_STD_C99 - Failed -- Performing Test HAVE_C_FLAG_STD_C89 -- Performing Test HAVE_C_FLAG_STD_C89 - Failed -- Performing Test HAVE_C_FLAG_FSANITIZE_UNDEFINED -- Performing Test HAVE_C_FLAG_FSANITIZE_UNDEFINED - Failed -- Performing Test HAVE_C_FLAG_FSANITIZE_ADDRESS -- Performing Test HAVE_C_FLAG_FSANITIZE_ADDRESS - Failed -- Performing Test HAVE_C_FLAG_COVERAGE -- Performing Test HAVE_C_FLAG_COVERAGE - Failed CMake Warning at /home/username/Projects/subseadisplay/zephyr/CMakeLists.txt:717 (message): No SOURCES given to Zephyr library: drivers__net

Excluding target from build.

CMake Warning at /home/username/Projects/subseadisplay/zephyr/CMakeLists.txt:717 (message): No SOURCES given to Zephyr library: driversethernetphy

Excluding target from build.

-- Configuring done -- Generating done -- Build files have been written to: /home/username/Projects/subseadisplay/zephyr/build -- west build: building application [7/199] Preparing syscall dependency handling

[160/199] Building C object modules/civetweb/CMakeFiles/..moduleslibcivetweb.dir/src/civetweb.c.obj FAILED: modules/civetweb/CMakeFiles/..moduleslibcivetweb.dir/src/civetweb.c.obj ccache /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc -DBUILD_VERSION=v2.7.0-rc1-151-g81595ed4db20 -DCORE_CM7 -DHSE_VALUE=8000000 -DKERNEL -DMG_EXTERNAL_FUNCTION_log_access -DMG_EXTERNAL_FUNCTION_mg_cry_internal_impl -DNO_ALTERNATIVE_QUEUE -DNO_CACHING -DNO_CGI -DNO_FILES -DNO_FILESYSTEMS -DNO_SSL -DSTM32F767xx -DUSE_FULL_LL_DRIVER -DUSE_HAL_DRIVER -DUSE_STACK_SIZE=0 -DUSE_WEBSOCKET -DZEPHYR_VERSION=\"2.7.0-rc1\" -D_FORTIFY_SOURCE=2 -DLINUX_ERRNO_EXTENSIONS -D__PROGRAM_START -DZEPHYR=1 -I/home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/include -I/home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include -I/home/username/Projects/subseadisplay/zephyr/include -I/home/username/Projects/subseadisplay/zephyr/build/zephyr/include/generated -I/home/username/Projects/subseadisplay/zephyr/soc/arm/st_stm32/stm32f7 -I/home/username/Projects/subseadisplay/zephyr/lib/libc/newlib/include -I/home/username/Projects/subseadisplay/zephyr/drivers -I/home/username/Projects/subseadisplay/zephyr/soc/arm/st_stm32/common -I/home/username/Projects/subseadisplay/zephyr/subsys/net/l2 -I/home/username/Projects/subseadisplay/zephyr/subsys/net/lib/sockets/. -I/home/username/Projects/subseadisplay/zephyr/subsys/net/lib/dns/. -I/home/username/Projects/subseadisplay/modules/lib/civetweb/include -I/home/username/Projects/subseadisplay/modules/hal/cmsis/CMSIS/Core/Include -I/home/username/Projects/subseadisplay/modules/hal/stm32/stm32cube/stm32f7xx/soc -I/home/username/Projects/subseadisplay/modules/hal/stm32/stm32cube/stm32f7xx/drivers/include -I/home/username/Projects/subseadisplay/modules/hal/stm32/stm32cube/stm32f7xx/drivers/include/Legacy -I/home/username/Projects/subseadisplay/modules/hal/stm32/stm32cube/common_ll/include -I/home/username/Projects/subseadisplay/modules/lib/civetweb/src -I/home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/src -Os -imacros /home/username/Projects/subseadisplay/zephyr/build/zephyr/include/generated/autoconf.h -ffreestanding -fno-common -g -gdwarf-4 -fdiagnostics-color=always -mcpu=cortex-m7 -mthumb -mabi=aapcs -mfp16-format=ieee -imacros /home/username/Projects/subseadisplay/zephyr/include/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wno-main -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-address-of-packed-member -Wno-unused-but-set-variable -Werror=implicit-int -fno-asynchronous-unwind-tables -fno-pie -fno-pic -fno-strict-overflow -fno-reorder-functions -fno-defer-pop -fmacro-prefix-map=/home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server=CMAKE_SOURCE_DIR -fmacro-prefix-map=/home/username/Projects/subseadisplay/zephyr=ZEPHYR_BASE -fmacro-prefix-map=/home/username/Projects/subseadisplay=WEST_TOPDIR -ffunction-sections -fdata-sections -specs=nano.specs -std=c99 -MD -MT modules/civetweb/CMakeFiles/..moduleslibcivetweb.dir/src/civetweb.c.obj -MF modules/civetweb/CMakeFiles/..moduleslibcivetweb.dir/src/civetweb.c.obj.d -o modules/civetweb/CMakeFiles/..moduleslib__civetweb.dir/src/civetweb.c.obj -c /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:45:3: error: conflicting types for 'pthread_attr_t' 45	} pthread_attr_t;	^~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:75:3: note: previous declaration of 'pthread_attr_t' was here 75	} pthread_attr_t;	^~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:47:15: error: conflicting types for 'pthread_t' 47	typedef void *pthread_t;	^~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:32:20: note: previous declaration of 'pthread_t' was here 32	typedef __uint32_t pthread_t; / identify a thread /	^~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:58:3: error: conflicting types for 'pthread_mutex_t' 58	} pthread_mutex_t;	^~~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:154:20: note: previous declaration of 'pthread_mutex_t' was here 154	typedef __uint32_t pthread_mutex_t; / identify a mutex /	^~~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:62:3: error: conflicting types for 'pthread_mutexattr_t' 62	} pthread_mutexattr_t;	^~~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:169:3: note: previous declaration of 'pthread_mutexattr_t' was here 169	} pthread_mutexattr_t;	^~~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:67:3: error: conflicting types for 'pthread_cond_t' 67	} pthread_cond_t;	^~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:176:20: note: previous declaration of 'pthread_cond_t' was here 176	typedef __uint32_t pthread_cond_t; / identify a condition variable /	^~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:61, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_types.h:70:3: error: conflicting types for 'pthread_condattr_t' 70	} pthread_condattr_t;	^~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:186:3: note: previous declaration of 'pthread_condattr_t' was here 186	} pthread_condattr_t; / a condition attribute object /	^~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:15, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/posix_sched.h:23:8: error: redefinition of 'struct sched_param' 23	struct sched_param {	^~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:23, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/sched.h:48:8: note: originally defined here 48	struct sched_param {	^~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:16, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/pthread_key.h:18:18: error: conflicting types for 'pthread_once_t' 18	typedef uint32_t pthread_once_t;	^~~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:195:3: note: previous declaration of 'pthread_once_t' was here 195	} pthread_once_t; / dynamic package initialization /	^~~~~~ In file included from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:16, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/pthread_key.h:21:15: error: conflicting types for 'pthread_key_t' 21	typedef void *pthread_key_t;	^~~~~ In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:190:20: note: previous declaration of 'pthread_key_t' was here 190	typedef __uint32_t pthread_key_t; / thread-specific data keys /	^~~~~ In file included from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:56: warning: "PTHREAD_CREATE_JOINABLE" redefined 56	#define PTHREAD_CREATE_JOINABLE PTHREAD_JOINABLE

In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:47: note: this is the location of the previous definition 47

#define PTHREAD_CREATE_JOINABLE 1

In file included from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:57: warning: "PTHREAD_CREATE_DETACHED" redefined 57	#define PTHREAD_CREATE_DETACHED PTHREAD_DETACHED

In file included from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/types.h:223, from /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/time.h:28, from /home/username/Projects/subseadisplay/zephyr/include/posix/time.h:12, from /home/username/Projects/subseadisplay/zephyr/include/posix/pthread.h:12, from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:170: /opt/zephyr-sdk-0.13.1/arm-zephyr-eabi/arm-zephyr-eabi/sys-include/sys/_pthreadtypes.h:46: note: this is the location of the previous definition 46

#define PTHREAD_CREATE_DETACHED 0

In file included from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:168: /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include/libc_extensions.h:26:5: error: expected ')' before '+' token 26 | int iscntrl(int c); | ^~~ /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include/libc_extensions.h:26:5: error: expected ')' before '[' token 26 | int iscntrl(int c); | ^~~ /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include/libc_extensions.h:26:5: error: expected ')' before '&' token 26 | int iscntrl(int c); | ^~~ In file included from /home/username/Projects/subseadisplay/modules/lib/civetweb/src/civetweb.c:172: /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include/libc_extensions.h:42:5: error: expected identifier or '(' before 'int' 42 | int ferror(FILE stream); | ^~ /home/username/Projects/subseadisplay/zephyr/samples/net/civetweb/websocket_server/../common/include/libc_extensions.h:42:5: error: expected ')' before '(' token 42 | int ferror(FILE stream); | ^~ [161/199] Building C object modules/stm32/stm32cube/CMakeFiles/.....stm32stm32cube.dir/stm32f7xx/drivers/src/stm32f7xx_ll_utils.c.obj ninja: build stopped: subcommand failed. FATAL ERROR: command exited with status 1: /snap/bin/cmake --build /home/username/Projects/subseadisplay/zephyr/build



**Environment (please complete the following information):**
The build log above is from Ubuntu 20.04 with Zephyr SDK 0.13.1, but the same issue appears on Windows using GNU ARM Embedded 10-2020-q4-major.
 - Zephyr commit 81595ed4db

zephyrproject-rtos / zephyr

CivetWeb samples fail to build with CONFIG_NEWLIB_LIBC #39037

General config

pthreads