On 2021-01-08 13:54, juan carlos rebate rodriguez via Cygwin wrote:
El vie, 08-01-2021 a las 08:42 +0000, Arthur Norman escribió:
I can't use virtualbox because what I need is to emulate the aarch64
architecture, I don't want to use binaries compiled by others, one of
the reasons is that those binaries don't include sd-card emulation
support...
This is perhaps an off-topic response as regards compiling things on
cygwin, but some while back I found a range of sets of instructions for
setting up aarch64 emulation in qemu. When I had any issues running on
Windows I just used virtualbox to give myself an x86_64 Linux world and
installed qemu there. And after a while I could buy a Raspberry pi with a
64-bit cpu and use that, so these days working with aarch64 (and an SD
card) works best for me on an rpi4 not via emulation. But to find people
who have worked on adapting and setting up qemu to support aarch64 with an
SD card you might find it useful to follow the footsteps of those who were
working towards rpi 64-bit support?
And I like and use cygwin for most of what I do, but when something I want
to do is better supported by Linux then setting up an Ubuntu via virtualbox
uses some disc space but does not add much overhead on my main W10 machine
and lets me build, test and debug there because following a path that is
already well trodden is often easiest!
I think I expressed myself incorrectly or I am not able to be
understood, no matter what package I choose. gcc-core does not compile
using the cygwin dll, the one that compiles for that library is cygwin-
gcc.
Packages gcc-core/g++ are the Cygwin native compilers for the architecture you
are running the compiler on and uses the Cygwin native DLL.
Packages cygwin32/64-gcc-core/g++ are the Cygwin cross-compilers for the
architecture you are not running the compiler on and uses the Cygwin DLL for the
other architecture.
Packages mingw64-i686/x86_64-gcc-core/g++ are the Cygwin cross-compilers for
each of the Windows architecture runtimes and use only
mingw64-i686/x86_64-lib... libraries and Windows native DLLs including msvcrt.dll.
now I will try to explain my case better,
1 when I use the gcc-core package if it is able to detect the whole
set, the only thing that happens is that the script does not recognize
cygwin nt as a valid operating system.
2 when I use the mingw64-x86_64-gcc package it is not able to compile
without add-ons.
Most complex packages have dependencies on (many) libraries: Cygwin supports 402
mingw64 development library packages for each architecture, which are used to
build its own Windows native utilities such as setup-x86/_64, cygcheck,
cygwin-console-helper, ldh, strace, and the cygwin1.dll itself, which do not
depend on any Cygwin DLLs e.g.
$ cygcheck `cygpath -m /setup`
C:\...\setup-x86_64.exe
C:\Windows\system32\ADVAPI32.dll
C:\Windows\system32\msvcrt.dll
C:\Windows\system32\ntdll.dll
C:\Windows\system32\KERNELBASE.dll
C:\Windows\system32\SECHOST.dll
C:\Windows\system32\RPCRT4.dll
C:\Windows\system32\KERNEL32.dll
C:\Windows\system32\COMCTL32.dll
C:\Windows\system32\GDI32.dll
C:\Windows\system32\win32u.dll
C:\Windows\system32\USER32.dll
C:\Windows\system32\ole32.dll
C:\Windows\system32\combase.dll
C:\Windows\system32\bcryptPrimitives.dll
C:\Windows\system32\PSAPI.DLL
C:\Windows\system32\SHELL32.dll
C:\Windows\system32\SHLWAPI.dll
C:\Windows\system32\WININET.dll
C:\Windows\system32\WS2_32.dll
$ cygcheck cygcheck
Found: C:\...\cygwin64\bin\cygcheck.exe
C:\...\cygwin64\bin\cygcheck.exe
C:\Windows\system32\ADVAPI32.dll
C:\Windows\system32\msvcrt.dll
C:\Windows\system32\ntdll.dll
C:\Windows\system32\KERNELBASE.dll
C:\Windows\system32\SECHOST.dll
C:\Windows\system32\RPCRT4.dll
C:\Windows\system32\KERNEL32.dll
C:\Windows\system32\PSAPI.DLL
C:\Windows\system32\USER32.dll
C:\Windows\system32\win32u.dll
C:\Windows\system32\GDI32.dll
C:\Windows\system32\WININET.dll
for example when I compile with gcc-core if it is able to detect the
libcaca-devel library, this is the library that qemu asks me for sd-
card support,
I don't think that is the required library for that function:
$ cygcheck -p libcaca-devel
Found 3 matches for libcaca-devel
libcaca-devel-0.99beta19-?: Color ASCII art library (C development) (installed
binaries and support files)
...
SD card support requires a hardware device driver and typically a filesystem
driver in the OS e.g. for FAT, NTFS, CD/DVD, or as utilities for foreign
filesystems e.g. /usr/sbin/mke2fs, resize2fs, tune2fs, dumpe2fs, e2freefrag,
e2image, e2fsck, etc. in packages e2fsprogs and e2fsimage.
Cygwin lib...-devel packages are for Cygwin native development with the Cygwin
native libraries, toolchain, and utilities.
However, when I use the package mingw64-x86_64-gcc it is not able to
find it in the system because it is not in its set, for this it is
mandatory to use the gcc-core package (not cygwin-gcc), I do not want
to use linux, I want to keep him as far away from my team as possible,
just because I work for him doesn't mean I want him
You have to install all the required and dependent library packages for that
cross-compiler architecture e.g. mingw64-<arch>-libcaca-0.99beta19-1 library
packages:
$ cygcheck -p mingw64-.*libcaca
Found 4 matches for mingw64-.*libcaca
mingw64-i686-libcaca-0.99.beta19-1-src - mingw64-i686-libcaca-src: Color ASCII
art library for Win32 toolchain (source)
mingw64-i686-libcaca-0.99.beta19-1 - mingw64-i686-libcaca: Color ASCII art
library for Win32 toolchain (installed binaries and support files)
mingw64-x86_64-libcaca-0.99.beta19-1-src - mingw64-x86_64-libcaca-src: Color
ASCII art library for Win64 toolchain (source)
mingw64-x86_64-libcaca-0.99.beta19-1 - mingw64-x86_64-libcaca: Color ASCII art
library for Win64 toolchain (installed binaries and support files)
to allow your package to build.
If required or dependent library packages are not already available in Cygwin,
you will have to build them using the cross-compiler toolchain and install them
for use by your package build.
The Cygwin package build utility cygport can help you more easily build Cygwin
packages, including mingw64 using cross-compiler toolchains, given a URL for the
upstream source package, and a list of Cygwin required or dependent library,
toolchain, and utility packages needed (it checks they are all available before
building).
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]
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