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nuttx/tools/Makefile.host
Marco Casaroli 8d08885d0f tools/nxflat: Import the NXFLAT thunk generator. 
An NXFLAT module reaches the base firmware through a "thunk" file: one
assembly stub per imported function, generated by mknxflat.  That tool
has always lived outside this repository, in the NuttX buildroot NXFLAT
toolchain, so building an NXFLAT module needs a separate checkout and a
separate build of a tool that links against libbfd.

libbfd is why it stayed out.  It is GPL, which an Apache project cannot
depend on, and it is awkward to obtain besides -- a stock binutils
install often ships libbfd without the libiberty it needs to link.  But
the dependency was never deep.  mknxflat used libbfd for eight calls,
all of them opening the file and walking the symbol table; it never
relocates or rewrites anything.  That is replaced here by reading the
ELF symbol table directly, which removes the dependency outright and
costs about a hundred lines.

The emitted text is unchanged.  The format strings live in the .def
files, which are carried here byte-for-byte from upstream, and the
selection rule for what becomes a thunk is the upstream one: everything
undefined that is not explicitly an object.  Symbol typing cannot be
trusted for this -- imported functions are routinely emitted as
STT_NOTYPE rather than STT_FUNC, while a weakly defined object does
appear as an undefined object -- so the test is on what a symbol is not.

Upstream chose the instruction set at compile time through an "arch"
symlink pointing at either arm/ or thumb2/.  A symlink cannot be carried
in the repository, and one host binary has to serve boards of both
flavours, since lpc31xx is ARM while lpc17xx, tiva, stm32f1 and rp23xx
are Thumb-2.  That choice becomes a runtime "-a" option.  The "-f"
option, which read further command line arguments from a file, is
dropped; nothing in the tree used it.

This commit changes no output.  Against the upstream tool, for both
architectures, with and without -w, over modules exercising the plain,
weak and non-returning thunk paths, the generated thunk files are
byte-identical.

Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
2026-08-06 01:38:23 +08:00

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############################################################################
# tools/Makefile.host
#
# SPDX-License-Identifier: Apache-2.0
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
export TOPDIR ?= $(CURDIR)/..
-include $(TOPDIR)/Make.defs
include ${TOPDIR}/tools/Config.mk
# Check the endian-ness of the target
ifeq ($(CONFIG_ENDIAN_BIG),y)
CFLAGS += -DTGT_BIGENDIAN=1
endif
# Targets
all: b16$(HOSTEXEEXT) bdf-converter$(HOSTEXEEXT) cmpconfig$(HOSTEXEEXT) \
configure$(HOSTEXEEXT) mkconfig$(HOSTEXEEXT) mkdeps$(HOSTEXEEXT) \
mksymtab$(HOSTEXEEXT) mksyscall$(HOSTEXEEXT) mkversion$(HOSTEXEEXT) \
mkpasswd$(HOSTEXEEXT) cnvwindeps$(HOSTEXEEXT) nxstyle$(HOSTEXEEXT) \
initialconfig$(HOSTEXEEXT) gencromfs$(HOSTEXEEXT) \
convert-comments$(HOSTEXEEXT) lowhex$(HOSTEXEEXT) \
detab$(HOSTEXEEXT) rmcr$(HOSTEXEEXT) incdir$(HOSTEXEEXT) \
mknxflat$(HOSTEXEEXT) jlink-nuttx$(HOSTDYNEXT)
default: mkconfig$(HOSTEXEEXT) mksyscall$(HOSTEXEEXT) mkdeps$(HOSTEXEEXT) \
cnvwindeps$(HOSTEXEEXT) incdir$(HOSTEXEEXT)
ifdef HOSTEXEEXT
.PHONY: b16 bdf-converter cmpconfig clean configure kconfig2html mkconfig \
mkdeps mksymtab mksyscall mkversion mkpasswd cnvwindeps nxstyle \
initialconfig gencromfs convert-comments lowhex detab rmcr incdir \
mknxflat
endif
ifdef HOSTDYNEXT
.PHONY: jlink-nuttx
endif
.PHONY: clean
# b16 - Fixed precision math conversion tool
b16$(HOSTEXEEXT): b16.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o b16$(HOSTEXEEXT) b16.c
ifdef HOSTEXEEXT
b16: b16$(HOSTEXEEXT)
endif
# configure - Instantiate a canned NuttX configuration
configure$(HOSTEXEEXT): configure.c cfgparser.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o configure$(HOSTEXEEXT) configure.c cfgparser.c
ifdef HOSTEXEEXT
configure: configure$(HOSTEXEEXT)
endif
# mkconfig - Convert a .config file into a C config.h file
mkconfig$(HOSTEXEEXT): mkconfig.c cfgdefine.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mkconfig$(HOSTEXEEXT) mkconfig.c cfgdefine.c
ifdef HOSTEXEEXT
mkconfig: mkconfig$(HOSTEXEEXT)
endif
# cmpconfig - Compare the contents of two configuration files
cmpconfig$(HOSTEXEEXT): cmpconfig.c cfgparser.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o cmpconfig$(HOSTEXEEXT) cmpconfig.c cfgparser.c
ifdef HOSTEXEEXT
cmpconfig: cmpconfig$(HOSTEXEEXT)
endif
# kconfig2html - Create an HTML document describing the configuration options
kconfig2html$(HOSTEXEEXT): kconfig2html.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o kconfig2html$(HOSTEXEEXT) kconfig2html.c
ifdef HOSTEXEEXT
kconfig2html: kconfig2html$(HOSTEXEEXT)
endif
# mkversion - Convert a .version file into a C version.h file
mkversion$(HOSTEXEEXT): mkconfig.c cfgdefine.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mkversion$(HOSTEXEEXT) mkversion.c cfgdefine.c
ifdef HOSTEXEEXT
mkversion: mkversion$(HOSTEXEEXT)
endif
# mkpasswd - Generate a NuttX /etc/passwd entry with PBKDF2-HMAC-SHA256 hash
mkpasswd$(HOSTEXEEXT): mkpasswd.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mkpasswd$(HOSTEXEEXT) mkpasswd.c
ifdef HOSTEXEEXT
mkpasswd: mkpasswd$(HOSTEXEEXT)
endif
# mksyscall - Convert a CSV file into syscall stubs and proxies
mksyscall$(HOSTEXEEXT): mksyscall.c csvparser.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mksyscall$(HOSTEXEEXT) mksyscall.c csvparser.c
ifdef HOSTEXEEXT
mksyscall: mksyscall$(HOSTEXEEXT)
endif
# mksymtab - Convert a CSV file into a symbol table
mksymtab$(HOSTEXEEXT): mksymtab.c csvparser.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mksymtab$(HOSTEXEEXT) mksymtab.c csvparser.c
ifdef HOSTEXEEXT
mksymtab: mksymtab$(HOSTEXEEXT)
endif
# mknxflat - Generate the thunk file for an NXFLAT module
MKNXFLAT_SRCS = nxflat/mknxflat.c nxflat/thunk_arm.c nxflat/thunk_thumb2.c
mknxflat$(HOSTEXEEXT): $(MKNXFLAT_SRCS)
$(Q) $(HOSTCC) $(HOSTCFLAGS) -Inxflat -o mknxflat$(HOSTEXEEXT) \
$(MKNXFLAT_SRCS)
ifdef HOSTEXEEXT
mknxflat: mknxflat$(HOSTEXEEXT)
endif
# bdf-converter - Converts a BDF font to the NuttX font format
bdf-converter$(HOSTEXEEXT): bdf-converter.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o bdf-converter$(HOSTEXEEXT) bdf-converter.c
ifdef HOSTEXEEXT
bdf-converter: bdf-converter$(HOSTEXEEXT)
endif
# nxstyle - Check a file for compliance to NuttX coding style
nxstyle$(HOSTEXEEXT): nxstyle.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -DTOPDIR=\"$(realpath $(TOPDIR))\" \
-o nxstyle$(HOSTEXEEXT) nxstyle.c
ifdef HOSTEXEEXT
nxstyle: nxstyle$(HOSTEXEEXT)
endif
# initialconfig - Create a barebones .config file sufficient only for
# instantiating the symbolic links necessary to do a real configuration
# from scratch.
initialconfig$(HOSTEXEEXT): initialconfig.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o initialconfig$(HOSTEXEEXT) initialconfig.c
ifdef HOSTEXEEXT
initialconfig: initialconfig$(HOSTEXEEXT)
endif
# gencromfs - Generate a CROMFS file system
gencromfs$(HOSTEXEEXT): gencromfs.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o gencromfs$(HOSTEXEEXT) gencromfs.c
ifdef HOSTEXEEXT
gencromfs: gencromfs$(HOSTEXEEXT)
endif
# convert-comments - Convert C++-style comments to C-style comments
convert-comments$(HOSTEXEEXT): convert-comments.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o convert-comments$(HOSTEXEEXT) convert-comments.c
ifdef HOSTEXEEXT
convert-comments: convert-comments$(HOSTEXEEXT)
endif
# lowhex - Convert hexadecimal constants to lower cast format
lowhex$(HOSTEXEEXT): lowhex.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o lowhex$(HOSTEXEEXT) lowhex.c
ifdef HOSTEXEEXT
lowhex: lowhex$(HOSTEXEEXT)
endif
# detab - Convert tabs to spaces
detab$(HOSTEXEEXT): detab.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o detab$(HOSTEXEEXT) detab.c
ifdef HOSTEXEEXT
detab: detab$(HOSTEXEEXT)
endif
# rmcr - Convert tabs to spaces
rmcr$(HOSTEXEEXT): rmcr.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o rmcr$(HOSTEXEEXT) rmcr.c
ifdef HOSTEXEEXT
rmcr: rmcr$(HOSTEXEEXT)
endif
# incdir - Generate compiler-specific include paths
incdir$(HOSTEXEEXT): incdir.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o incdir$(HOSTEXEEXT) incdir.c
ifdef HOSTEXEEXT
incdir: incdir$(HOSTEXEEXT)
endif
# cnvwindeps - Convert dependences generated by a Windows native toolchain
# for use in a Cygwin/POSIX build environment
cnvwindeps$(HOSTEXEEXT): cnvwindeps.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o cnvwindeps$(HOSTEXEEXT) cnvwindeps.c
ifdef HOSTEXEEXT
cnvwindeps: cnvwindeps$(HOSTEXEEXT)
endif
# Create dependencies for a list of files
mkdeps$(HOSTEXEEXT): mkdeps.c csvparser.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -o mkdeps$(HOSTEXEEXT) mkdeps.c
ifdef HOSTEXEEXT
mkdeps: mkdeps$(HOSTEXEEXT)
endif
# jlink-nuttx - Create jlink GDBServer nuttx plugin
jlink-nuttx$(HOSTDYNEXT): jlink-nuttx.c
$(Q) $(HOSTCC) $(HOSTCFLAGS) -shared -fPIC jlink-nuttx.c -o jlink-nuttx$(HOSTDYNEXT)
ifdef HOSTDYNEXT
jlink-nuttx: jlink-nuttx$(HOSTDYNEXT)
endif
clean:
$(call DELFILE, b16)
$(call DELFILE, b16.exe)
$(call DELFILE, bdf-converter)
$(call DELFILE, bdf-converter.exe)
$(call DELFILE, cmpconfig)
$(call DELFILE, cmpconfig.exe)
$(call DELFILE, cnvwindeps)
$(call DELFILE, cnvwindeps.exe)
$(call DELFILE, convert-comments)
$(call DELFILE, convert-comments.exe)
$(call DELFILE, configure)
$(call DELFILE, configure.exe)
$(call DELFILE, detab)
$(call DELFILE, detab.exe)
$(call DELFILE, gencromfs)
$(call DELFILE, gencromfs.exe)
$(call DELFILE, initialconfig)
$(call DELFILE, initialconfig.exe)
$(call DELFILE, lowhex)
$(call DELFILE, lowhex.exe)
$(call DELFILE, Make.dep)
$(call DELFILE, mkconfig)
$(call DELFILE, mkconfig.exe)
$(call DELFILE, mknxflat)
$(call DELFILE, mknxflat.exe)
$(call DELFILE, mkdeps)
$(call DELFILE, mkdeps.exe)
$(call DELFILE, mksymtab)
$(call DELFILE, mksymtab.exe)
$(call DELFILE, mksyscall)
$(call DELFILE, mksyscall.exe)
$(call DELFILE, mkversion)
$(call DELFILE, mkversion.exe)
$(call DELFILE, mkpasswd)
$(call DELFILE, mkpasswd.exe)
$(call DELFILE, nxstyle)
$(call DELFILE, nxstyle.exe)
$(call DELFILE, rmcr)
$(call DELFILE, rmcr.exe)
$(call DELFILE, jlink-nuttx.so)
$(call DELFILE, jlink-nuttx.dll)
ifneq ($(CONFIG_WINDOWS_NATIVE),y)
$(Q) rm -rf *.dSYM
endif
$(Q) $(MAKE) -C pic32 -f Makefile.host clean
$(Q) $(MAKE) -C cxd56 -f Makefile.host clean
$(call DELFILE, incdir)
$(call DELFILE, incdir.exe)
$(call CLEAN)
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