tdf#130080 soffice.sh: Avoid exporting empty LC_ALL

The previous way of doing

    LO_SAVE_LC_ALL="$LC_ALL"
    LC_ALL=C
    export LC_ALL
    # ... (call some tools,...)
    LC_ALL="$LO_SAVE_LC_ALL"

resulted in the LC_ALL environment variable explicity being
set to an empty string in case it was not set at all previously.

For some reason, an LC_ALL explicitly set to an empty string
(other than an unset LC_ALL) makes the system ICU on various
Linux distributions assume an "US-ASCII" encoding, even if the
locale is otherwise configured to be a UTF-8 one.
Since the corresponding detection from ICU is used in the
KF5/Qt stack, that resulted in the Plasma-native file picker
assuming an ASCII-encoding, and thus having problems with
files containing non-ASCII characters.

To avoid this, don't export LC_ALL if unset or set to an
empty string.

A big thanks to frinring on IRC #kde-devel for the analysis
of why the Plasma-native file picker is affected by LC_ALL being
set to an empty string!

I could also reproduce that the following sample program run
with 'LC_ALL=' on KDE Neon Developer edition printed "US-ASCII"
when using the system ICU, while it printed "UTF-8" when using
a self-built ICU as of current master (commit
d6b88d49e3be7096baf3828776c2b482a8ed1780) instead, but did not
further investigate why:

    #include <unicode/ucnv.h>
    #include <iostream>

    int main() {
        std::cout << ucnv_getDefaultName();
    }

Change-Id: Idee88f200b6edecdb2633ed6e6fa70b370ffcf0c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88003
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
Tested-by: Jenkins
(cherry picked from commit 25649502e08a52087dea5e482d34a1d4150f0930)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88035
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
(cherry picked from commit d037d971b4f4f408c7a6b6c15a0c7e742f61d354)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/88125
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

0 files changed, 0 insertions, 0 deletions