Re: crosstool configure confusion re __cxa_atexit

[Charlie Brady <charlieb-crossgcc at e-smith dot com>]

On Mon, 5 Jan 2004, Charlie Brady wrote:

> I'm not sure whether this is from vanilla crosstool or Carl's uclibc 
> patches,

A bit of both actually.

> but I notice that configure was told to both disable and enable 
> __cxa_atexit. That doesn't seem wise to me:
> 
> [charlieb@pc-00085 gcc-3.3.2-uClibc-0.9.23]$ cat build-gcc/config.status
> #!/bin/sh
> # This file was generated automatically by configure.  Do not edit.
> # This directory was configured as follows:
> /home/charlieb/rpms/BUILD/crosstool-0.25/build/mipsel-unknown-linux-uclibc/gcc-3.3.2-uClibc-0.9.23/gcc-3.3.2/configure 
> --with-gcc-version-trigger=/home/charlieb/rpms/BUILD/crosstool-0.25/build/mipsel-unknown-linux-uclibc/gcc-3.3.2-uClibc-0.9.23/gcc-3.3.2/gcc/version.c 
> --target=mipsel-unknown-linux-uclibc --host=i686-host_pc-linux-gnu 
> --prefix=/opt/crosstool/mipsel-unknown-linux-uclibc/gcc-3.3.2-uClibc-0.9.23 
> --disable-__cxa_atexit 
> --with-headers=/opt/crosstool/mipsel-unknown-linux-uclibc/gcc-3.3.2-uClibc-0.9.23/mipsel-unknown-linux-uclibc/include 
> --disable-nls --enable-threads=posix --enable-symvers=gnu 
> --enable-__cxa_atexit --enable-languages=c,c++ --enable-shared 
> --enable-c99 --enable-long-long --norecursion 

This comes from the interpolation of $(GCC_EXTRA_CONFIG) in the final gcc 
configure run, but with the interpolation happening just after --prefix, 
IOW, quite early in the command line. I assume that in this case the 
attempt to disable __cxa_atexit for the uclibc build will be ineffective.

Is there any reason not to have $(GCC_EXTRA_CONFIG) last? And should the 
existing args by explicit in-line, or should they be set by other 
variables. We have a bunch of stuff listed which may not be appropriate 
for all targets which might be supported:

    ${GCC_DIR}/configure --target=$TARGET --host=$HOST --prefix=$PREFIX \
        ${GCC_EXTRA_CONFIG} \
        --with-headers=${PREFIX}/${TARGET}/include \
        --disable-nls \
        --enable-threads=posix \
        --enable-symvers=gnu \
        --enable-__cxa_atexit \
        --enable-languages=c,c++ \
        --enable-shared \
        --enable-c99 \
        --enable-long-long


--
Charlie


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