--- Оригінальне повідомлення ---
Від кого: "Mathieu Lirzin" <mthl@gnu.org>
Дата: 18 січня 2018, 00:45:20

> I have took a quick look a GMP “configure.ac” and it seems that they
> have an option ’--enable-cxx’ which triggers the use of the AC_PROG_CXX
> macro which I guess should set things properly (I am not an Autoconf
> expert), If not this is either an issue with GMP configuration or with
> With AC_PROG_CXX implementation.
> 
> Could you investigate with the ’--enable-cxx’ option?

Me run GMP builds with '--enable-cxx' flag. But it has no effect on this issue, presumably since it doesn't call any subroutine, which enable 'compile' use for MSVC explicitly or as a side effect.

Taking into account your tips, considered to replace 'CC="cl" CXX="cl"' with 'CC="$PWD/compile cl" CXX="$PWD/compile cl"' options in GMP build commands. This fixed this issue and ensures no problems, when '_AM_PROG_CC_C_O' would be removed from Automake.

Thus I assume this issue could be closed. Thank you for help.

Best,

Alexander