[Users] Build of Win32 Installer fails on gmp-6.2.1

[Jonathan Boeing]

On Sat, 2 Jul 2022 15:35:29 +0100
Rosemary Lockie via Users <users at lists.claws-mail.org> wrote:

> Hello,
> 
> Maybe a query for Jonathan?
> 
> I am trying to rebuild v3.19 of the Win32 Installer Windows Subsystem
> for Linux v.2, and Debian (Bullseye) and have discovered MAKE fails
> when trying to build gmp-6.2.1.
> 
> My first build on WLS v1 was successful, so I assume the issue
> relates to WSL v2. 
> 
> The error reported is:
> 
> [snip]
> checking for build system executable sufix... configure: error:
> Cannot determine executable suffix
> [snip]
> 
> The received wisdom online is that it does relate to WSL2 [qv
> https://gmplib.org/list-archives/gmp-bugs/2020-January/004714.html ]
> 
> and can be fixed by setting environment variables CC and CC_FOR_BUILD
> explicitly, eg:
> 
> export CC=x86_64-w64-mingw32-gcc
> export CC_FOR_BUILD=x86_64-linux-gnu-gcc
> 
> I tried that, before running autogen.sh, but the build still fails,
> and it occurred to me that perhaps those values are not correct for a
> Claws Build?

The package-specific build arguments are in src/Makefile.am.  To set
CC and CC_FOR_BUILD explicitly for gmp's configure, change
cm_pkg_gmp_configure from:

cm_pkg_gmp_configure = \
        --disable-static \
        --enable-shared \
        --disable-cxx

to:

cm_pkg_gmp_configure = \
        --disable-static \
        --enable-shared \
        --disable-cxx \
        CC=$(CC) \
        CC_FOR_BUILD=$(CC)

Regards,

Jonathan