URL: <https://savannah.gnu.org/patch/?10469>
Summary: Add support for 32-bit mode on FreeBSD/powerpc64
Group: GNU Libtool
Submitter: haible
Submitted: Sat 24 Aug 2024 02:12:56 PM CEST
Category: None
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
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Follow-up Comments:
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Date: Sat 24 Aug 2024 02:12:56 PM CEST By: Bruno Haible <haible>
FreeBSD 14 has two PowerPC64 ports:
* A little-endian one (powerpc64le),
* a big-endian one (powerpc64).
The latter is a bi-arch system: While "cc" creates 64-bit binaries, "cc -m32"
creates 32-bit binaries. 32-bit executables have /libexec/ld-elf32.so.1 as
dynamic loader.
In GNU libunistring, the unit tests in the build tree are libtool wrapper
scripts. In 32-bit mode, they all fail:
$ ./test-accept
ld-elf32.so.1: Shared object "libunistring.so.5" not found, required by
"test-accept"
The library was built correctly in the build tree:
$ ls -lL /home/bruno/libunistring-1.2/build-32/lib/.libs/libunistring.so.5
-rwxr-xr-x 1 bruno bruno 3347152 Aug 24 04:25
/home/bruno/libunistring-1.2/build-32/lib/.libs/libunistring.so.5
The problem is that the wrapper script uses the variable 'LD_LIBRARY_PATH':
$ grep LIBRARY_PATH test-accept
# Add our own library path to LD_LIBRARY_PATH
LD_LIBRARY_PATH="/home/bruno/libunistring-1.2/build-32/lib/.libs:$LD_LIBRARY_PATH"
# Some systems cannot cope with colon-terminated LD_LIBRARY_PATH
LD_LIBRARY_PATH=`$ECHO "$LD_LIBRARY_PATH" | /usr/bin/sed 's/::*$//'`
export LD_LIBRARY_PATH
And indeed, LD_LIBRARY_PATH seems to be ignored here:
$ LD_LIBRARY_PATH=/home/bruno/libunistring-1.2/build-32/lib/.libs
.libs/test-accept
ld-elf32.so.1: Shared object "libunistring.so.5" not found, required by
"test-accept"
The documentation <https://man.freebsd.org/cgi/man.cgi?query=ld.so> says:
"On 64-bit architectures, the linker for 32-bit objects recognizes all the
environment variables listed below, but is being prefixed with LD_32_, for
example: LD_32_TRACE_LOADED_OBJECTS."
So, let's try LD_32_LIBRARY_PATH instead:
$ LD_32_LIBRARY_PATH=/home/bruno/libunistring-1.2/build-32/lib/.libs
.libs/test-accept
(works)
Or like this:
$ sed -i -e 's/LD_LIBRARY_PATH/LD_32_LIBRARY_PATH/g' test-accept
$ ./test-accept
(works)
The fix is, of course, to change the value of shlibpath_var in the generated
'libtool' script.
Note: The lt_cv_* values in config.cache are the same for the 32-bit build as
for the 64-bit build:
$ diff build-64/config.cache build-32/config.cache
23c23
< ac_cv_env_CC_value='cc -ferror-limit=0'
---
> ac_cv_env_CC_value='cc -m32 -ferror-limit=0'
...
407,408c402,403
< gl_cv_header_working_stdint_h=${gl_cv_header_working_stdint_h=no}
< gl_cv_host_cpu_c_abi_32bit=${gl_cv_host_cpu_c_abi_32bit=no}
---
> gl_cv_header_working_stdint_h=${gl_cv_header_working_stdint_h=yes}
> gl_cv_host_cpu_c_abi_32bit=${gl_cv_host_cpu_c_abi_32bit=yes}
...
Find attached:
* freebsd-biarch.diff: a patch relative to libtool-2.4.7.
* 0001-Fix-libtool-wrapper-programs-in-32-bit-mode-on-FreeB.patch: a commit
for libtool 'master'.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Name: freebsd-biarch.diff Size: 761B
<https://file.savannah.gnu.org/file/freebsd-biarch.diff?file_id=56379>
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Name: 0001-Fix-libtool-wrapper-programs-in-32-bit-mode-on-FreeB.patch Size:
1KiB
<https://file.savannah.gnu.org/file/0001-Fix-libtool-wrapper-programs-in-32-bit-mode-on-FreeB.patch?file_id=56380>
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