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Fix #914, Add toolchain file for RTEMS 5.1/pc-rtems #1031

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merged 1 commit into from Dec 9, 2020
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Fix #914, Add toolchain file for RTEMS 5.1/pc-rtems #1031

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3 changes: 1 addition & 2 deletions cmake/sample_defs/toolchain-i686-rtems4.11.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -42,8 +42,7 @@ SET(CMAKE_AR "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}ar")
SET(CMAKE_OBJDUMP "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}objdump")
SET(CMAKE_OBJCOPY "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}objcopy")

# Note that CEXP is not a shared library loader - it will not support code compiled with -fPIC
# Also exception handling is very iffy. These two options disable eh_frame creation.
# Exception handling is very iffy. These two options disable eh_frame creation.
set(CMAKE_C_COMPILE_OPTIONS_PIC -fno-exceptions -fno-asynchronous-unwind-tables)

# search for programs in the build host directories
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83 changes: 83 additions & 0 deletions cmake/sample_defs/toolchain-i686-rtems5.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,83 @@
# This example toolchain file describes the cross compiler to use for
# the target architecture indicated in the configuration file.

# In this sample application, the cross toolchain is configured to
# use a compiler for the RTEMS operating system targeting the "pc686" BSP

# Note that to use this, the "RTEMS" platform module may need to be added
# to the system-wide CMake installation as a default CMake does not yet
# recognize RTEMS as a system name. An example of this is distributed with
# the pc-rtems PSP.

# Basic cross system configuration
set(CMAKE_SYSTEM_NAME RTEMS)
set(CMAKE_SYSTEM_PROCESSOR i386)
set(CMAKE_SYSTEM_VERSION 5)

# The TOOLS and BSP are allowed to be installed in different locations.
# If the README was followed they will both be installed under $HOME
# By default it is assumed the BSP is installed to the same directory as the tools
SET(RTEMS_TOOLS_PREFIX "$ENV{HOME}/rtems-${CMAKE_SYSTEM_VERSION}" CACHE PATH
"RTEMS tools install directory")
SET(RTEMS_BSP_PREFIX "${RTEMS_TOOLS_PREFIX}" CACHE PATH
"RTEMS BSP install directory")

# The BSP that will be used for this build
set(RTEMS_BSP "pc686")

# specify the cross compiler - adjust accord to compiler installation
# This uses the compiler-wrapper toolchain that buildroot produces
SET(SDKHOSTBINDIR "${RTEMS_TOOLS_PREFIX}/bin")
set(TARGETPREFIX "${CMAKE_SYSTEM_PROCESSOR}-rtems${CMAKE_SYSTEM_VERSION}-")
set(RTEMS_BSP_C_FLAGS "-march=i686 -mtune=i686 -fno-common")
set(RTEMS_BSP_CXX_FLAGS ${RTEMS_BSP_C_FLAGS})


SET(CMAKE_C_COMPILER "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}gcc")
SET(CMAKE_CXX_COMPILER "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}g++")
SET(CMAKE_LINKER "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}ld")
SET(CMAKE_ASM_COMPILER "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}as")
SET(CMAKE_STRIP "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}strip")
SET(CMAKE_NM "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}nm")
SET(CMAKE_AR "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}ar")
SET(CMAKE_OBJDUMP "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}objdump")
SET(CMAKE_OBJCOPY "${RTEMS_TOOLS_PREFIX}/bin/${TARGETPREFIX}objcopy")

# Exception handling is very iffy. These two options disable eh_frame creation.
set(CMAKE_C_COMPILE_OPTIONS_PIC -fno-exceptions -fno-asynchronous-unwind-tables)

# Link libraries needed for an RTEMS 5.x executable
# This was handled by the bsp_specs file in 4.11
set(LINK_LIBRARIES "-lrtemsdefaultconfig -lrtemsbsp -lrtemscpu")

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

SET(CMAKE_PREFIX_PATH /)

# these settings are specific to cFE/OSAL and determines which
# abstraction layers are built when using this toolchain
SET(CFE_SYSTEM_PSPNAME pc-rtems)
SET(OSAL_SYSTEM_BSPTYPE pc-rtems)
SET(OSAL_SYSTEM_OSTYPE rtems)

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# This is for RTEMS 5 specific ifdefs needed by the OSAL
ADD_DEFINITIONS(-D_RTEMS_5_)
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# Info regarding the RELOCADDR:
#+--------------------------------------------------------------------------+
#| Set the value of RELOCADDR to the address where you want your image to
#| load. If you'll be using GRUB to load the images it will have to be >=
#| 0x100000 (1024K). If you are using NetBoot to load the images it can be
#| >= 0x10000 (64K) AND <= 0x97C00 (607K) OR >= 0x100000 (1024K). The memory
#| top is of course another limit. Make sure there is enough space before the
#| upper memory limits for the image and the memory allocated by it to fit.
#| Make sure the value you choose is aligned to 4 bytes.
#+--------------------------------------------------------------------------+
set(RTEMS_RELOCADDR 0x00100000)