I have a pre-existing GPS project (.GPR) file for an old project that has worked fine

GNAT community Edition doesn't support Ada before Ada 2012. See <a href="https://www.a

I made some follow-up. The MSYS2 on Windows 64 pacman</code

[20180611] invalid switch: -gnat95 [Ada] prep.adb about gnatstudio HOT 2 CLOSED

adacore commented on August 27, 2024

[20180611] invalid switch: -gnat95 [Ada] prep.adb

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Comments (2)

reznikmm commented on August 27, 2024 2

GNAT community Edition doesn't support Ada before Ada 2012. See here.
Use other compiler or remove -gnat95 from your project file.

This is definitely not a GPS bug.

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aplatypus commented on August 27, 2024 1

I made some follow-up. The MSYS2 on Windows 64 pacman Ada compiler is GCC v7.3.

mingw-w64-x86_64-gcc-ada 7.3.0-2 (mingw-w64-x86_64-toolchain)
    GNU Compiler Collection (Ada) for MinGW-w64

gnatmake.exe  --version
GNATMAKE 7.3.0
Copyright (C) 1995-2017, Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

This Ada compiler supports the -ada95 switch and all the Ada-s: 👍

Usage: gnat1 switches sfile

  sfile     Source file name

  -g            Generate debugging information
  -Idir         Specify source files search path
  -I-           Do not look for sources in current directory
  -O[0123]      Control the optimization level
   
    :

  -gnatyN   Cancel all previously set style checks
  -gnatzc   Distribution stub generation for caller stubs
  -gnatzr   Distribution stub generation for receiver stubs
  -gnat83   Ada 83 mode
  -gnat95   Ada 95 mode
  -gnat2005 Ada 2005 mode
  -gnat2012 Ada 2012 mode (default)
  -gnat-p   Cancel effect of previous -gnatp switch

        .file   "<stdin>

And I was able to run the compiler OK without the invalid switch error.

So there is a workaround for anyone passing this way and not having access to Ada 83, 95 and 05.

Alas ... the GNU gnat1 version is actually even LESS helpful. There is no version option at all (not even a disabled one). 👎

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