Add long double option to cmake

Author: keith-packard

CMakeLists.txt

@@ -373,6 +373,10 @@ if(NOT DEFINED _WANT_IO_LONG_LONG)
   option(_WANT_IO_LONG_LONG "Support long long in integer printf/scanf" OFF)
 endif()
 
+if(NOT DEFINED _WANT_IO_LONG_DOUBLE)
+  option(_WANT_IO_LONG_DOUBLE "Support long double in printf/scanf" OFF)
+endif()
+
 if(NOT DEFINED _WANT_MINIMAL_IO_LONG_LONG)
   option(_WANT_MINIMAL_IO_LONG_LONG "Support long long in minimal printf/scanf" OFF)
 endif()

picolibc.h.in

@@ -398,6 +398,8 @@
 
 #cmakedefine _WANT_IO_LONG_LONG
 
+#cmakedefine _WANT_IO_LONG_DOUBLE
+
 #cmakedefine _WANT_MINIMAL_IO_LONG_LONG
 
 #cmakedefine _WANT_IO_POS_ARGS

zephyr/zephyr.cmake

@@ -67,6 +67,7 @@ if(CONFIG_PICOLIBC_USE_MODULE)
   picolibc_option_true("_WANT_MINIMAL_IO_LONG_LONG" CONFIG_PICOLIBC_IO_MINIMAL_LONG_LONG)
   picolibc_option_false("_WANT_IO_PERCENT_B" CONFIG_PICOLIBC_IO_PERCENT_B)
   picolibc_option_true("_WANT_IO_POS_ARGS" CONFIG_PICOLIBC_IO_POS_ARGS)
+  picolibc_option_true("_WANT_IO_LONG_DOUBLE" CONFIG_PICOLIBC_IO_LONG_DOUBLE)
   picolibc_option_true("_PRINTF_SMALL_ULTOA" CONFIG_PICOLIBC_IO_SMALL_ULTOA)
   picolibc_option_true("FORMAT_DEFAULT_DOUBLE" CONFIG_PICOLIBC_IO_FLOAT)
   picolibc_option_val("FORMAT_DEFAULT_FLOAT" 0)