posix: Use _POSIX_C_SOURCE=200809L instead of 200809

This constant is supposed to be defined as a long instead of an int,
presumably to support systems where int isn't large enough.

Signed-off-by: Keith Packard <keithp@keithp.com>

arch/posix/CMakeLists.txt

@@ -133,7 +133,7 @@ if (CONFIG_GPROF)
   target_link_options(native_simulator INTERFACE "-pg")
 endif()
 
-zephyr_compile_definitions(_POSIX_C_SOURCE=200809 _XOPEN_SOURCE=600 _XOPEN_SOURCE_EXTENDED)
+zephyr_compile_definitions(_POSIX_C_SOURCE=200809L _XOPEN_SOURCE=600 _XOPEN_SOURCE_EXTENDED)
 
 if (CONFIG_NATIVE_APPLICATION)
   zephyr_ld_options(

boards/posix/native_posix/hw_models_top.c

@@ -71,7 +71,7 @@ void hwm_signal_end_handler(int sig)
  * Therefore we set SA_RESETHAND: This way, the 2nd time the signal is received
  * the default handler would be called to terminate the program no matter what.
  *
- * Note that SA_RESETHAND requires either _POSIX_C_SOURCE>=200809 or
+ * Note that SA_RESETHAND requires either _POSIX_C_SOURCE>=200809L or
  * _XOPEN_SOURCE>=500
  */
 void hwm_set_sig_handler(void)

scripts/native_simulator/Makefile

@@ -60,7 +60,7 @@ NSI_OPT?=-O0
 #  Warnings switches (for the runner itself)
 NSI_WARNINGS?=-Wall -Wpedantic
 #  Preprocessor flags
-NSI_CPPFLAGS?=-D_POSIX_C_SOURCE=200809 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED
+NSI_CPPFLAGS?=-D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED
 
 NO_PIE_CO:=-fno-pie -fno-pic
 DEPENDFLAGS:=-MMD -MP

scripts/native_simulator/common/src/nsi_hw_scheduler.c

@@ -55,7 +55,7 @@ static void nsi_hws_signal_end_handler(int sig)
  * Therefore we set SA_RESETHAND: This way, the 2nd time the signal is received
  * the default handler would be called to terminate the program no matter what.
  *
- * Note that SA_RESETHAND requires either _POSIX_C_SOURCE>=200809 or
+ * Note that SA_RESETHAND requires either _POSIX_C_SOURCE>=200809L or
  * _XOPEN_SOURCE>=500
  */
 static void nsi_hws_set_sig_handler(void)

tests/lib/c_lib/common/src/main.c

@@ -16,7 +16,7 @@
  */
 
 #ifdef CONFIG_NEWLIB_LIBC
-#define _POSIX_C_SOURCE 200809
+#define _POSIX_C_SOURCE 200809L
 #endif
 
 #include <zephyr/kernel.h>