posix: xsi_streams: add tc-provides-xsi-streams kconfig option

Enable the toolchain to provide the XSI_STREAMS Option Group.

Signed-off-by: Chris Friedt <chris@fr4.co>

Author: cfriedt

lib/posix/Kconfig.toolchain

@@ -219,6 +219,9 @@ config TC_PROVIDES_XSI_SIGNALS
 config TC_PROVIDES_XSI_SINGLE_PROCESS
 	bool
 
+config TC_PROVIDES_XSI_STREAMS
+	bool
+
 config TC_PROVIDES_XSI_SYSTEM_DATABASE
 	bool
 

lib/posix/options/CMakeLists.txt

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 set(POSIX_VERSION 200809L)
+set(XOPEN_VERSION 700)
 set(GEN_DIR ${ZEPHYR_BINARY_DIR}/include/generated)
 
 zephyr_compile_definitions(-D_POSIX_C_SOURCE=${POSIX_VERSION})
@@ -165,15 +166,20 @@ if(NOT CONFIG_TC_PROVIDES_XSI_REALTIME)
   zephyr_library_sources_ifdef(CONFIG_POSIX_SHARED_MEMORY_OBJECTS shm.c)
 endif()
 
-zephyr_library_sources_ifdef(CONFIG_XSI_STREAMS stropts.c)
-
 if(NOT CONFIG_TC_PROVIDES_XSI_SINGLE_PROCESS)
   zephyr_library_sources_ifdef(CONFIG_XSI_SINGLE_PROCESS
     env_common.c
     xsi_single_process.c
   )
 endif()
 
+if(NOT CONFIG_TC_PROVIDES_XSI_STREAMS)
+  zephyr_library_sources_ifdef(CONFIG_XSI_STREAMS stropts.c)
+endif()
+if(CONFIG_XSI_STREAMS)
+  zephyr_compile_definitions(-D_XOPEN_STREAMS=${XOPEN_VERSION})
+endif()
+
 if(NOT CONFIG_TC_PROVIDES_XSI_SYSTEM_LOGGING)
   zephyr_library_sources_ifdef(CONFIG_XSI_SYSTEM_LOGGING syslog.c)
 endif()