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Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system
From: |
Glenn Morris |
Subject: |
Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system |
Date: |
Tue, 09 Jan 2007 23:14:02 -0500 |
User-agent: |
Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/) |
Actually, I don't know any more if I'm asking for a reasonable thing.
Should I expect to be able to _compile_ 32-bit apps on an x86_64
system, or just _run_ them? The fact that almost none of the OS
"devel" packages exist in 32-bit form suggests the latter.
Glenn Morris wrote:
> I imagine it's reasonable to expect configure to just Do The Right
> Thing
With some playing around, I find the following change enables me to
just use configure --build=i386-linux-gnu to get the desired result. I
don't know how correct/desirable it is though.
Index: configure.in
===================================================================
RCS file: /sources/emacs/emacs/configure.in,v
retrieving revision 1.428
diff -c -c -w -r1.428 configure.in
*** configure.in 3 Jan 2007 23:47:04 -0000 1.428
--- configure.in 10 Jan 2007 04:09:31 -0000
***************
*** 1486,1491 ****
--- 1486,1523 ----
CPPFLAGS="$c_switch_system $c_switch_machine $CPPFLAGS"
fi
+ ## Build a 32-bit version on x86_64 GNU/Linux?
+ case "${canonical}" in
+ i386-*linux-gnu* )
+ case `$SHELL "$ac_aux_dir/config.guess"` in
+ x86_64-*-linux-gnu* )
+
+ x86_64_build_m32=yes
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="-m32 $CFLAGS"
+ AC_MSG_CHECKING([whether compiler understands -m32])
+ AC_TRY_COMPILE([], [], has_option=yes, has_option=no,)
+ AC_MSG_RESULT($has_option)
+ if test $has_option = yes; then
+ REAL_CFLAGS="-m32 $REAL_CFLAGS"
+ fi
+ CFLAGS="$save_CFLAGS"
+ unset has_option
+ unset save_CFLAGS
+
+ save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="-m32 $LDFLAGS"
+ AC_MSG_CHECKING([whether linker understands -m32])
+ AC_LINK_IFELSE([main(){return 0;}],
+ [AC_MSG_RESULT(yes)],
+ LDFLAGS="$save_LDFLAGS"
+ [AC_MSG_RESULT(no)])
+ unset save_LDFLAGS ;;
+
+ esac ;;
+ esac
+
dnl For AC_FUNC_GETLOADAVG, at least:
AC_CONFIG_LIBOBJ_DIR(src)
***************
*** 1765,1770 ****
--- 1797,1805 ----
if test "${x_libraries}" != NONE; then
if test -n "${x_libraries}"; then
+ if test -n "${x86_64_build_m32}"; then
+ x_libraries=`echo ${x_libraries} | sed -e "s:/lib64:/lib:g"`
+ fi
LD_SWITCH_X_SITE=-L`echo ${x_libraries} | sed -e "s/:/ -L/g"`
LD_SWITCH_X_SITE_AUX=-R`echo ${x_libraries} | sed -e "s/:/ -R/g"`
fi
- add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Glenn Morris, 2007/01/08
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Andreas Schwab, 2007/01/09
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Richard Stallman, 2007/01/09
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Andreas Schwab, 2007/01/09
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Glenn Morris, 2007/01/09
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system,
Glenn Morris <=
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Stefan Monnier, 2007/01/10
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Glenn Morris, 2007/01/10
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Eli Zaretskii, 2007/01/10
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Stefan Monnier, 2007/01/13
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Glenn Morris, 2007/01/15
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Andreas Schwab, 2007/01/16
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Stefan Monnier, 2007/01/16
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Richard Stallman, 2007/01/10
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Glenn Morris, 2007/01/10
- Re: add etc/PROBLEMS entry for building 32-bit exe on 64-bit system, Richard Stallman, 2007/01/14