Hi I maintain a telephony (voicemail) system based on an ancient Linux version (Kernel 2.6.25, GCC 4.1.2, GLIBC 2.5, PowerPC (32bit, BE)). I need to update timezones for the upcoming Canada permanent DST. Last time I successfully installed new TZ files on this system was using tzdata2016c and tzcode 2016c. Updating compiler and glibc is not possible, as we have quite the installed base of these, with old software I can get tzcode+data 2026c to compile/install (with a warning), but the resulting files do not work with the glibc version I have (date command returns time without tz info). I could use some help in generating a version of tz files that will work. The compile line I used was: make CFLAGS='-std=gnu99 -DHAVE_LINK=0' TZDIR=/usr/share/zoneinfo DATAFORM=rearguard install (HAVE_LINK=0 to force symlinks instead of hardlinks, as that is what the system expects). date --version date (GNU coreutils) 6.9 gcc --version gcc (GCC) 4.1.2 Copyright (C) 2006 Free Software Foundation, Inc. Warnings when compiling: strftime.c:70:39: warning: integer overflow in preprocessor expression In file included from strftime.c:95: localtime.c:267:39: warning: integer overflow in preprocessor expression (I did get help here getting things to compile with the 2023 version, but I never actually used the output, nor check ed that it was working with the system) Thanks, Rune Torgersen Innovative Systems LLC.
I might have figured it out... (As typical, 30 seconds after asking a question.,..) make CFLAGS='-std=gnu99 -DHAVE_LINK=0' TZDIR=/usr/share/zoneinfo DATAFORM=rearguard ZFLAGS='-b fat' install seems to work. (ZFLAGS = -b fat was required.) From: Rune Torgersen via tz <tz@iana.org> Sent: Monday, July 13, 2026 9:43 AM To: Time zone mailing list <tz@iana.org> Subject: [tz] Installing new tzdata on old system Hi I maintain a telephony (voicemail) system based on an ancient Linux version (Kernel 2.6.25, GCC 4.1.2, GLIBC 2.5, PowerPC (32bit, BE)). I need to update timezones for the upcoming Canada permanent DST. Last time I successfully installed new TZ files on this system was using tzdata2016c and tzcode 2016c. Updating compiler and glibc is not possible, as we have quite the installed base of these, with old software I can get tzcode+data 2026c to compile/install (with a warning), but the resulting files do not work with the glibc version I have (date command returns time without tz info). I could use some help in generating a version of tz files that will work. The compile line I used was: make CFLAGS='-std=gnu99 -DHAVE_LINK=0' TZDIR=/usr/share/zoneinfo DATAFORM=rearguard install (HAVE_LINK=0 to force symlinks instead of hardlinks, as that is what the system expects). date --version date (GNU coreutils) 6.9 gcc --version gcc (GCC) 4.1.2 Copyright (C) 2006 Free Software Foundation, Inc. Warnings when compiling: strftime.c:70:39: warning: integer overflow in preprocessor expression In file included from strftime.c:95: localtime.c:267:39: warning: integer overflow in preprocessor expression (I did get help here getting things to compile with the 2023 version, but I never actually used the output, nor check ed that it was working with the system) Thanks, Rune Torgersen Innovative Systems LLC.
I do still get the overflow warings, not sure if those are anything to worry about ot not. From: Rune Torgersen <runet@innovsys.com> Sent: Monday, July 13, 2026 9:53 AM To: Rune Torgersen <runet@innovsys.com>; Time zone mailing list <tz@iana.org> Subject: RE: Installing new tzdata on old system I might have figured it out... (As typical, 30 seconds after asking a question.,..) make CFLAGS='-std=gnu99 -DHAVE_LINK=0' TZDIR=/usr/share/zoneinfo DATAFORM=rearguard ZFLAGS='-b fat' install seems to work. (ZFLAGS = -b fat was required.) From: Rune Torgersen via tz <tz@iana.org<mailto:tz@iana.org>> Sent: Monday, July 13, 2026 9:43 AM To: Time zone mailing list <tz@iana.org<mailto:tz@iana.org>> Subject: [tz] Installing new tzdata on old system Hi I maintain a telephony (voicemail) system based on an ancient Linux version (Kernel 2.6.25, GCC 4.1.2, GLIBC 2.5, PowerPC (32bit, BE)). I need to update timezones for the upcoming Canada permanent DST. Last time I successfully installed new TZ files on this system was using tzdata2016c and tzcode 2016c. Updating compiler and glibc is not possible, as we have quite the installed base of these, with old software I can get tzcode+data 2026c to compile/install (with a warning), but the resulting files do not work with the glibc version I have (date command returns time without tz info). I could use some help in generating a version of tz files that will work. The compile line I used was: make CFLAGS='-std=gnu99 -DHAVE_LINK=0' TZDIR=/usr/share/zoneinfo DATAFORM=rearguard install (HAVE_LINK=0 to force symlinks instead of hardlinks, as that is what the system expects). date --version date (GNU coreutils) 6.9 gcc --version gcc (GCC) 4.1.2 Copyright (C) 2006 Free Software Foundation, Inc. Warnings when compiling: strftime.c:70:39: warning: integer overflow in preprocessor expression In file included from strftime.c:95: localtime.c:267:39: warning: integer overflow in preprocessor expression (I did get help here getting things to compile with the 2023 version, but I never actually used the output, nor check ed that it was working with the system) Thanks, Rune Torgersen Innovative Systems LLC.
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Rune Torgersen