select() fix to handl POLLHUP; STM32 FPU saving in context switches seems to be functional
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4420 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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@ -32,6 +32,8 @@ Development Environment
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GNU Toolchain Options
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=====================
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Toolchain Configurations
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------------------------
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The NuttX make system has been modified to support the following different
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toolchain options.
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@ -91,12 +93,16 @@ GNU Toolchain Options
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If you have problems with the dependency build (for example, if you are not
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building on C:), then you may need to modify tools/mkdeps.sh
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NOTE 1: The CodeSourcery toolchain (2009q1) does not work with default optimization
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The CodeSourcery Toolchain (2009q1)
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-----------------------------------
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The CodeSourcery toolchain (2009q1) does not work with default optimization
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level of -Os (See Make.defs). It will work with -O0, -O1, or -O2, but not with
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-Os.
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NOTE 2: The free, "Lite" version of the Atollic toolchain does not support C++
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nor does it support ar, nm, objdump, or objdcopy. If you use the Atollic "Lite"
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The Atollic "Lite" Toolchain
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----------------------------
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The free, "Lite" version of the Atollic toolchain does not support C++ nor
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does it support ar, nm, objdump, or objdcopy. If you use the Atollic "Lite"
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toolchain, you will have to set:
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CONFIG_HAVE_CXX=n
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@ -122,22 +128,24 @@ GNU Toolchain Options
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errors build some host binaries in tools/ when you first make. Here is my
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workaround kludge.
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1. Edit the setenv.sh to put the Atollic toolchain at the beginning of the PATH
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2. Source the setenv.sh file: . ./setenv.sh. A side effect of this is that it
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will set an environment variable called PATH_ORIG.
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3. Then go back to the original patch: export PATH=$PATH_ORIG
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4. Then make. The make will build all of the host executable but will fail
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when it gets to the first ARM binary.
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5. Then source setenv.sh again: . ./setenv.sh. That will correct the PATH
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again. When you do make again, the host executables are already made and
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now the correct PATH is in place for the ARM build.
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1. Edit the setenv.sh to put the Atollic toolchain at the beginning of the PATH
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2. Source the setenv.sh file: . ./setenv.sh. A side effect of this is that it
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will set an environment variable called PATH_ORIG.
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3. Then go back to the original patch: export PATH=$PATH_ORIG
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4. Then make. The make will build all of the host executable but will fail
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when it gets to the first ARM binary.
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5. Then source setenv.sh again: . ./setenv.sh. That will correct the PATH
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again. When you do make again, the host executables are already made and
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now the correct PATH is in place for the ARM build.
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Also, the Atollic toolchain is the only toolchain that has built-in support for
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the FPU in these configurations. If you plan to use the Cortex-M4 FPU, you will
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need to use the Atollic toolchain for now. See the FPU section below for more
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information.
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NOTE 3: The devkitARM toolchain includes a version of MSYS make. Make sure that
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devkitARM
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---------
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The devkitARM toolchain includes a version of MSYS make. Make sure that the
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the paths to Cygwin's /bin and /usr/bin directories appear BEFORE the devkitARM
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path or will get the wrong version of make.
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@ -31,6 +31,8 @@ Development Environment
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GNU Toolchain Options
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=====================
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Toolchain Configurations
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------------------------
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The NuttX make system has been modified to support the following different
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toolchain options.
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@ -90,12 +92,16 @@ GNU Toolchain Options
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If you have problems with the dependency build (for example, if you are not
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building on C:), then you may need to modify tools/mkdeps.sh
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NOTE 1: The CodeSourcery toolchain (2009q1) does not work with default optimization
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The CodeSourcery Toolchain (2009q1)
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-----------------------------------
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The CodeSourcery toolchain (2009q1) does not work with default optimization
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level of -Os (See Make.defs). It will work with -O0, -O1, or -O2, but not with
|
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-Os.
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NOTE 2: The free, "Lite" version of the Atollic toolchain does not support C++
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nor does it support ar, nm, objdump, or objdcopy. If you use the Atollic "Lite"
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The Atollic "Lite" Toolchain
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----------------------------
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The free, "Lite" version of the Atollic toolchain does not support C++ nor
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does it support ar, nm, objdump, or objdcopy. If you use the Atollic "Lite"
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toolchain, you will have to set:
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CONFIG_HAVE_CXX=n
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@ -118,25 +124,27 @@ GNU Toolchain Options
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and g++.exe in the same bin/ file as their ARM binaries. If the Atollic bin/ path
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appears in your PATH variable before /usr/bin, then you will get the wrong gcc
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when you try to build host executables. This will cause to strange, uninterpretable
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errors build some host binaries in tools/ when you first make. Here is my
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errors build some host binaries in tools/ when you first make. Here is my
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workaround kludge.
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1. Edit the setenv.sh to put the Atollic toolchain at the beginning of the PATH
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2. Source the setenv.sh file: . ./setenv.sh. A side effect of this is that it
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will set an environment variable called PATH_ORIG.
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3. Then go back to the original patch: export PATH=$PATH_ORIG
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4. Then make. The make will build all of the host executable but will fail
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when it gets to the first ARM binary.
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5. Then source setenv.sh again: . ./setenv.sh. That will correct the PATH
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again. When you do make again, the host executables are already made and
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now the correct PATH is in place for the ARM build.
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1. Edit the setenv.sh to put the Atollic toolchain at the beginning of the PATH
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2. Source the setenv.sh file: . ./setenv.sh. A side effect of this is that it
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will set an environment variable called PATH_ORIG.
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3. Then go back to the original patch: export PATH=$PATH_ORIG
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4. Then make. The make will build all of the host executable but will fail
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when it gets to the first ARM binary.
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5. Then source setenv.sh again: . ./setenv.sh. That will correct the PATH
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again. When you do make again, the host executables are already made and
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now the correct PATH is in place for the ARM build.
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Also, the Atollic toolchain is the only toolchain that has built-in support for
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the FPU in these configurations. If you plan to use the Cortex-M4 FPU, you will
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need to use the Atollic toolchain for now. See the FPU section below for more
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information.
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NOTE 3: The devkitARM toolchain includes a version of MSYS make. Make sure that
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devkitARM
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---------
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The devkitARM toolchain includes a version of MSYS make. Make sure that the
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the paths to Cygwin's /bin and /usr/bin directories appear BEFORE the devkitARM
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path or will get the wrong version of make.
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