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Date: Wed, 12 Jan 2022 08:08:45 +0100
From: Jakub Jelinek <jakub@redhat.com>
To: David Edelsohn <dje.gcc@gmail.com>
Cc: Thomas Koenig <tkoenig@netcologne.de>,
 Bill Schmidt <wschmidt@linux.ibm.com>,
 GCC Patches <gcc-patches@gcc.gnu.org>, Fortran List <fortran@gcc.gnu.org>
Subject: Re: libgfortran bootstrap failure
Message-ID: <20220112070845.GG2646553@tucnak>
Reply-To: Jakub Jelinek <jakub@redhat.com>
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On Tue, Jan 11, 2022 at 10:30:26PM -0500, David Edelsohn wrote:
> The recent patch to support Power IEEE128 causes a bootstrap failure
> on AIX and possibly all non-GLIBC systems.
> 
> +#if defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ \
> +    && defined __GLIBC_PREREQ && __GLIBC_PREREQ (2, 32)
> +#define POWER_IEEE128 1
> +#endif
> 
> __GLIBC_PREREQ is tested on all systems.
> 
> /nasfarm/edelsohn/src/src/libgfortran/libgfortran.h:107:49: error:
> missing binary operator before token "("
>   107 |     && defined __GLIBC_PREREQ && __GLIBC_PREREQ (2, 32)
>       |                                                 ^

Guess we need:
#if defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ \
    && defined __GLIBC_PREREQ
# if __GLIBC_PREREQ (2, 32)
#  define POWER_IEEE128 1
# endif
#endif
instead.

	Jakub