My understanding wrt. Y2038 and 32-bit glibc hosts was such that it makes sense to set said compiler flags globally to ensure user space wide Y2038 compliance. So I encountered this compiler error while building poky reference images with additional effective

  TARGET_CPPFLAGS += "-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64"

declaration in meta/conf/distro/include/tclibc-glibc.inc.

-Niko

On 8.11.2022 13.50, Alexander Kanavin wrote:
So you need to set -D_TIME_BITS=64
-D_FILE_OFFSET_BITS=64 to get some error? But why set that, shouldn’t the defaults work?

Alex

On Tue 8. Nov 2022 at 12.48, Niko Mauno <niko.ma...@vaisala.com <mailto:niko.ma...@vaisala.com>> wrote:

    I have not studied the issue, but in order to reproduce this error I
    add
    'MACHINE = "qemuarm"' to local.conf then issue 'bitbake kbd' against
    current master while TARGET_CPPFLAGS value is set to "-D_TIME_BITS=64
    -D_FILE_OFFSET_BITS=64".

    -Niko

    On 8.11.2022 11.14, Alexander Kanavin wrote:
     > We do build for 32 bit arm targets, so is this seen only in specific
     > circumstances? What are they?
     >
     > Alex
     >
     > On Tue, 8 Nov 2022 at 01:09, Niko Mauno via
    lists.openembedded.org
    <http://lists.openembedded.org/
     > <niko.mauno=vaisala....@lists.openembedded.org
    <mailto:vaisala....@lists.openembedded.org>> wrote:
     >>
     >> For now add exemption in order to avoid following failure during
     >> do_compile()
     >>
     >>    |
    
.../build/tmp/work/cortexa15t2hf-neon-poky-linux-gnueabi/kbd/2.5.1-r0/recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi/../../libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/12.2.0/ld:.libs/libtswrap.ver:2:
 syntax error in VERSION script
     >>    | collect2: error: ld returned 1 exit status
     >>
     >> Signed-off-by: Niko Mauno <niko.ma...@vaisala.com
    <mailto:niko.ma...@vaisala.com>>
     >> ---
     >>   meta/recipes-core/kbd/kbd_2.5.1.bb
    <http://kbd_2.5.1.bb/
     >>   1 file changed, 3 insertions(+)
     >>
     >> diff --git a/meta/recipes-core/kbd/kbd_2.5.1.bb
    <http://kbd_2.5.1.bb/
     >> index aa3ab6e121..b623aecd36 100644
     >> --- a/meta/recipes-core/kbd/kbd_2.5.1.bb
    <http://kbd_2.5.1.bb/
     >> +++ b/meta/recipes-core/kbd/kbd_2.5.1.bb
    <http://kbd_2.5.1.bb/
     >> @@ -18,6 +18,9 @@ SRC_URI =
    "${KERNELORG_MIRROR}/linux/utils/${BPN}/${BP}.tar.xz \
     >>
     >>   SRC_URI[sha256sum] =
    "ccdf452387a6380973d2927363e9cbb939fa2068915a6f937ff9d24522024683"
     >>
     >> +# Compiling 64 bit time for 32 bit host is broken
     >> +GLIBC_64BIT_TIME_CPPFLAGS = ""
     >> +
     >>   PACKAGECONFIG ?= "${@bb.utils.filter('DISTRO_FEATURES', 'pam',
    d)} \
     >>                     "
     >>
     >> --
     >> 2.36.1
     >>
     >>
>> >>

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