Re: How can we run all tests using C++ specified compiler?

[Václav Haisman]

On Sun, 5 Aug 2018 at 00:17, Jeffrey Walton <address@hidden> wrote:

> I'm testing different configurations of a C++ library. When I test on
> AIX with XLC I am catching an error:
>
> -bash-4.4$ OBJECT_MODE=64 CXX=xlC ./configure
> checking for a BSD-compatible install... ./install-sh -c
> checking whether build environment is sane... yes
> checking for a thread-safe mkdir -p... ./install-sh -c -d
> checking for gawk... gawk
> checking whether make sets $(MAKE)... yes
> checking whether make supports nested variables... yes
> checking for style of include used by make... GNU
> checking for gcc... gcc
> checking whether the C compiler works... no
> configure: error: in `/home/noloader/cryptopp':
> configure: error: C compiler cannot create executables
> See `config.log' for more details
> ...
>
> The problem is using the wrong compiler:
>
> configure:3381: gcc    conftest.c  >&5
> Assembler:
> /tmp/cczCkD4X.s: line 9: Only .llong should be used for relocatable
> expressions.
> configure:3385: $? = 1
> configure:3423: result: no
>
> Our configure.ac has AC_PROG_CXX after the various init's, and lacks
> AC_PROG_CC. We don't do anything with the C compiler because we are a
> C++ library.
>
> How do we tell Autoconf to use the specified C++ compiler for all tests?
>
>
>
Your Autoconf test needs to be wrapped around with AC_LANG_PUSH([C++]) and
AC_LANG_POP([C++]).


-- 
VH