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circuitpython/qemu-arm
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Paul Sokolovsky 0dbd928cee Makefiles: Remove duplicate object files when linking. 
Scenario: module1 depends on some common file from lib/, so specifies it
in its SRC_MOD, and the same situation with module2, then common file
from lib/ eventually ends up listed twice in $(OBJ), which leads to link
errors.

Make is equipped to deal with such situation easily, quoting the manual:
"The value of $^ omits duplicate prerequisites, while $+ retains them and
preserves their order." So, just use $^ consistently in all link targets.
 		2015-10-24 15:46:53 +03:00
..
Makefile Makefiles: Remove duplicate object files when linking. 2015-10-24 15:46:53 +03:00
README.md qemu: fix typo in readme 2014-07-02 18:30:46 +01:00
main.c py: Allocate parse nodes in chunks to reduce fragmentation and RAM use. 2015-10-02 00:11:11 +01:00
mpconfigport.h py: Remove dependency on printf/fwrite in mp_plat_print. 2015-10-15 00:05:55 +01:00
qstrdefsport.h qemu-arm: more generic port name. 2014-04-21 21:04:04 +01:00
test_main.c py: Allocate parse nodes in chunks to reduce fragmentation and RAM use. 2015-10-02 00:11:11 +01:00

README.md

This is experimental, community-supported port for Cortex-M emulation as provided by QEMU (http://qemu.org).

The purposes of this port are to enable:

  1. Continuous integration
    • run tests agains architecture-specific parts of code base
  2. Experimentation
    • simulation & prototyping of anything that has architecture-specific code
    • exploring instruction set in terms of optimising some part of MicroPython or a module
  3. Streamlined debugging
    • no need for JTAG or even an MCU chip itself
    • no need to use OpenOCD or anything else that might slow down the process in terms of plugging things together, pressing buttons, etc.

This port will only work with with GCC ARM Embedded toolchain and not with CodeSourcery toolchain. You will need to modify LDFLAGS if you want to use CodeSourcery's version of arm-none-eabi. The difference is that CodeSourcery needs -T generic-m-hosted.ld while ARM's version requires --specs=nano.specs --specs=rdimon.specs to be passed to the linker.