Update build instructions in README.md.

[BrentSeidel]

-- Using the following command as indicated in the README.md file

./build_rts.py --output=temp --build sam4s

ends in failure with the following traceback:

install runtime sources for sam4s Traceback (most recent call last): File "./build_rts.py", line 274, in main() File "./build_rts.py", line 251, in main dest, rts_descriptor=args.rts_src_descriptor) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/bsp_sources/installer.py", line 159, in install runtime_sources = self._find_rts_sources(destination, rts_descriptor) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/bsp_sources/installer.py", line 136, in _find_rts_sources assert ret is not None, "Cannot find %s" % rts_json_file AssertionError: Cannot find rts-sources.json

There is a command get_rts_sources.py which looks like it might create the rts-sources.json file, but when I run it as:

./gen_rts_sources.py --output=temp --rts-profile ravenscar-sfp

it also ends with the following traceback:

Traceback (most recent call last): File "./gen_rts_sources.py", line 93, in main() File "./gen_rts_sources.py", line 88, in main rts_sources=sources, rts_scenarios=all_scenarios) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/rts_sources/init.py", line 212, in init self.add_sources(key, srcs) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/files_holder.py", line 162, in add_sources self.add_source(dir, src) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/files_holder.py", line 152, in add_source self.add_source_alias(dir, base, src) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/files_holder.py", line 134, in add_source_alias self.dirs[dir].append(FilePair(dst, src)) File "/Volumes/External - Data/Users/brent/Development/Ada/bb-temp/bb-runtimes/support/files_holder.py", line 59, in init "Error: source file %s not found in gnat" % src AssertionError: Error: source file libgnat/a-assert.ads not found in gnat

The README.md file should be updated to list the current build procedure and what assumptions are being made by the tools.

[Fabien-Chouteau]

Hi @BrentSeidel ,

rts-sources.json should be found in your GNAT Community install: <INSTALL>/arm-eabi/lib/gnat/rts-sources.json. Is the compiler in PATH?

[BrentSeidel]

I did find its-sources.json in the GNAT ARM Community install. Both the ARM and the native compilers are in $PATH. I've tried ./build_rts.py on both MacOS and Windows 10 and get similar results about rts-sources.json. Do I need to copy it somewhere else?

[Fabien-Chouteau]

The script uses gprls to find it.

What is the output of this command in your context?

gprls -v --target=arm-eabi

[BrentSeidel]

Hi @Fabien-Chouteau,

The output from gprls -v --target=arm-eabi is: gprconfig: language 'ada', target 'arm-eabi', default runtime

GPRLS Community 2020 (20200818) (x86_64-apple-darwin17.7.0) Copyright (C) 2015-2020, AdaCore

Source Search Path: /Volumes/External - Data/Users/brent/Development/Ada/bb-runtimes//

Object Search Path: /Volumes/External - Data/Users/brent/Development/Ada/bb-runtimes//

Project Search Path:

/usr/share/gtkada/lib/gnat /Volumes/External - Data/Users/brent/opt/GNAT/2020/arm-eabi/lib/gnat /Volumes/External - Data/Users/brent/opt/GNAT/2020/arm-eabi/share/gpr /Volumes/External - Data/Users/brent/opt/GNAT/2020/share/gpr /Volumes/External - Data/Users/brent/opt/GNAT/2020/lib/gnat For reference, my $PATH is (with non-gnat items obscured: @@@:/Users/brent/opt/GNAT/2020/bin:/Users/brent/opt/GNAT/2019/bin:/Users/brent/opt/GNAT/2020-arm-elf/bin:/Users/brent/opt/gnat/2019-arm-elf/bin:/usr/local/bin:@@@:@@@:@@@:@@@:@@@:@@@ Note that there is a symlink from /Users/brent/opt to /Volumes/External - Data/Users/brent/opt. Is the ARM-ELF installation expected to be installed on top of the GNAT 2020 installation or in a separate directory? I have it in a separate directory.

[Fabien-Chouteau]

The script support/bsp_sources/installer.py is looking for rts-sources.json all the Project Search Path: directories:

/usr/share/gtkada/lib/gnat
/Volumes/External - Data/Users/brent/opt/GNAT/2020/arm-eabi/lib/gnat
/Volumes/External - Data/Users/brent/opt/GNAT/2020/arm-eabi/share/gpr
/Volumes/External - Data/Users/brent/opt/GNAT/2020/share/gpr
/Volumes/External - Data/Users/brent/opt/GNAT/2020/lib/gnat

[Fabien-Chouteau]

You can add some prints in support/bsp_sources/installer.py to have more info. For instance:

    def _find_rts_sources(self, destination, descriptor):
        """Find the runtime sources and the json file that describes them.
        """
        # First look in the relative path
        rts_json_file = 'rts-sources.json'

        ret = None
        if descriptor is not None:
            # First: take the one given on the command line if any
            ret = os.path.abspath(descriptor)
        else:
            # Next: try a relative path from the install directotry
            fname = os.path.join(destination, rts_json_file)
            if os.path.exists(fname):
                ret = os.path.normpath(fname)

        print(str(ret))
        if ret is None:
            # Finally: Use gprls to retrieve gnat installation path and see
            # if we find the file somewhere in the project search path
            if not self.is_native:
                res = subprocess.check_output(
                    ['gprls', '-v', '--target=%s' % self.tgt.target],
                    stderr=subprocess.STDOUT).decode()
                print("gprls: " + str(res))
            else:
                res = subprocess.check_output(
                    ['gprls', '-v'],
                    stderr=subprocess.STDOUT).decode()
                print("gprls: " + str(res))
            in_prj_search_path = False
            ret = None
            for line in res.splitlines():
                if not in_prj_search_path:
                    if line == 'Project Search Path:':
                        in_prj_search_path = True
                    continue
                line = line.strip()
                if line == '<Current_Directory>':
                    continue
                if len(line) == 0:
                    break
                tentative = os.path.join(line, rts_json_file)
                if os.path.exists(tentative):
                    ret = os.path.normpath(tentative)
                    break
        print(str(ret))
        assert ret is not None, "Cannot find %s" % rts_json_file
        return SharedRTSSources(ret)

[BrentSeidel]

I expected that it was looking in those directories. The thing is that that installed the arm-elf in its own directory alongside the GNAT community directory. Thus, I have .../GNAT/2020/ and .../GNAT/2020-arm-elf/. So, in .../GNAT/2020/ I created a symlink:

ln -s ../2020-arm-elf/arm-eabi arm-eabi

and the build process gets further. Now, I get the following: ./build_rts.py --output=temp --build sam4s sam4s install runtime sources for sam4s building project /Volumes/External - Data/Users/brent/Development/Ada/bb-runtimes/temp/zfp-sam4s/runtime_build.gpr Setup [mkdir] object directory for project Runtime_Build [mkdir] library directory for project Runtime_Build Compile [Asm_Cpp] breakpoint_handler-cortexm.s [Ada] i-c.ads [Ada] s-textio.adb [Ada] s-memory.adb [Ada] board_config.ads [Ada] gnat.ads board_config.ads:28:06: "Interfaces.Sam" is not a predefined library unit board_config.ads:29:06: "Interfaces.Sam.Pmc" is not a predefined library unit

compilation of board_config.ads failed

gprbuild: *** compilation phase failed Traceback (most recent call last): File "./build_rts.py", line 274, in main() File "./build_rts.py", line 261, in main subprocess.check_call(cmd) File "/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/subprocess.py", line 363, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['gprbuild', '-j0', '-p', '-P', '/Volumes/External - Data/Users/brent/Development/Ada/bb-runtimes/temp/zfp-sam4s/runtime_build.gpr']' returned non-zero exit status 4.

[Fabien-Chouteau]

It's ok to have the two install side by side, this is what I do. I think you should start from a clean install and do not add the symlink.