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-rw-r--r--nuttx/configs/stm32f4discovery/README.txt26
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diff --git a/nuttx/configs/stm32f4discovery/README.txt b/nuttx/configs/stm32f4discovery/README.txt
index c1d484279..39fb41d78 100644
--- a/nuttx/configs/stm32f4discovery/README.txt
+++ b/nuttx/configs/stm32f4discovery/README.txt
@@ -1447,6 +1447,32 @@ Where <subdir> is one of the following:
STANDBY mode. This used of the RTC alarm could conflict with other uses of
the RTC alarm in your application.
+
+ posix_spawn:
+ ------------
+ This configuration directory, performs a simple test os the posix_spawn
+ interface using apps/examples/posix_spawn.
+
+ NOTES:
+
+ 1. This configuration uses the mconf-based configuration tool. To
+ change this configuration using that tool, you should:
+
+ a. Build and install the kconfig-mconf tool. See nuttx/README.txt
+ and misc/tools/
+
+ b. Execute 'make menuconfig' in nuttx/ in order to start the
+ reconfiguration process.
+
+ 2. Default toolchain:
+
+ CONFIG_HOST_WINDOWS=y : Builds under windows
+ CONFIG_WINDOWS_CYGWIN=y : Using Cygwin and
+ CONFIG_STM32_CODESOURCERYW=y : The native Windows CodeSourcery toolchain
+
+ 3. By default, this project assumes that you are *NOT* using the DFU
+ bootloader.
+
winbuild:
--------