Build failure for pydevd on alpha: gp-relative relocation against dynamic symbol

[Julian Gilbey]

Hi!

I'm completely out of my depth on this one, and I wonder whether
anyone might be able to help.

I have just updated pydevd from 2.9.6+ds-1, uploaded 2023-06-23, to
version 2.10.0+ds-1. But the build of the cython extension now fails
on alpha: near the end of the build log

https://buildd.debian.org/status/fetch.php?pkg=pydevd&arch=alpha&ver=2.10.0%2Bds-1&stamp=1697725269&raw=0

is the failed build:

I: pybuild pybuild:340: cd /<<PKGBUILDDIR>>/.pybuild/cpython3_3.11_pydevd/build; python3.11 setup_pydevd_cython.py build_ext --inplace --force-cython
/usr/lib/python3/dist-packages/Cython/Compiler/Main.py:369: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: /<<PKGBUILDDIR>>/.pybuild/cpython3_3.11_pydevd/build/_pydevd_bundle/pydevd_cython.pxd
tree = Parsing.p_module(s, pxd, full_module_name)
Compiling _pydevd_bundle/pydevd_cython.pyx because it changed.
[1/1] Cythonizing _pydevd_bundle/pydevd_cython.pyx
running build_ext
building '_pydevd_bundle.pydevd_cython' extension
creating build
creating build/temp.linux-alpha-cpython-311
creating build/temp.linux-alpha-cpython-311/_pydevd_bundle
alpha-linux-gnu-gcc -Wsign-compare -mieee -DNDEBUG -g -fwrapv -O2 -Wall -g -Wformat -Werror=format-security -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -specs=/usr/share/dpkg/pie-compile.specs -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DPy_BUILD_CORE_MODULE=1 -I/usr/include/python3.11 -c _pydevd_bundle/pydevd_cython.c -o build/temp.linux-alpha-cpython-311/_pydevd_bundle/pydevd_cython.o -flto
creating build/lib.linux-alpha-cpython-311
creating build/lib.linux-alpha-cpython-311/_pydevd_bundle
alpha-linux-gnu-gcc -shared -Wl,-O1 -Wl,-Bsymbolic-functions -specs=/usr/share/dpkg/pie-link.specs -Wl,-z,relro -Wl,-z,now -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -specs=/usr/share/dpkg/pie-compile.specs -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-alpha-cpython-311/_pydevd_bundle/pydevd_cython.o -L/usr/lib/alpha-linux-gnu -o build/lib.linux-alpha-cpython-311/_pydevd_bundle/pydevd_cython.cpython-311-alpha-linux-gnu.so -flto
lto-wrapper: warning: using serial compilation of 7 LTRANS jobs
lto-wrapper: note: see the ‘-flto’ option documentation for more information
/usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_module_is_main__pydevd_bundle__pydevd_cython
/usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_module_is_main__pydevd_bundle__pydevd_cython
/usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_wrapperbase_14_pydevd_bundle_13pydevd_cython_12ThreadTracer_2__call__
/usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_wrapperbase_14_pydevd_bundle_13pydevd_cython_12ThreadTracer_2__call__
/usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_wrapperbase_14_pydevd_bundle_13pydevd_cython_12ThreadTracer_2__call__
collect2: error: ld returned 1 exit status
error: command '/usr/bin/alpha-linux-gnu-gcc' failed with exit code 1
E: pybuild pybuild:395: build: plugin distutils failed with: exit code=1: cd /<<PKGBUILDDIR>>/.pybuild/cpython3_3.11_pydevd/build; python3.11 setup_pydevd_cython.py build_ext --inplace --force-cython


I have no idea what caused these errors. The cython code
(pydevd_cython.pyx) has not changed between these two upstream
versions, and I regenerate the pydevd_cython.c file at this point
(using the --force-cython flag) - as cython3 has not changed, the
resulting C file should not have changed either. So I can only
presume that it is something to do with a change in the C
compiler/linker toolchain.

Any suggestions would be welcome! In the meantime, I can just disable
the cython extension on alpha.

Best wishes,

Julian

[Adrian Bunk]

>...

That's related to #1040062, the best fix that does not involve touching dpkg is:

--- pydevd-2.10.0+ds/debian/rules.old 2023-10-28 12:12:23.060259727 +0000
+++ pydevd-2.10.0+ds/debian/rules 2023-10-28 12:14:34.343882684 +0000
@@ -4,7 +4,11 @@
include /usr/share/dpkg/pkg-info.mk
export PYBUILD_NAME=pydevd

+ifneq (,$(filter $(DEB_HOST_ARCH), alpha ia64 x32))
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all,-pie
+else
export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+endif

CXXFLAGS:=$(shell dpkg-buildflags --get CXXFLAGS)
CPPFLAGS:=$(shell dpkg-buildflags --get CPPFLAGS)


> Best wishes,
>
> Julian

cu
Adrian

[Julian Gilbey]

On Sat, Oct 28, 2023 at 03:34:47PM +0300, Adrian Bunk wrote:
> On Fri, Oct 20, 2023 at 07:03:41AM +0100, Julian Gilbey wrote:
> > Hi!
> >
> > I'm completely out of my depth on this one, and I wonder whether
> > anyone might be able to help.

> > [...]

> > /usr/bin/ld: /tmp/ccR4bmTq.ltrans5.ltrans.o: gp-relative relocation against dynamic symbol __pyx_module_is_main__pydevd_bundle__pydevd_cython

> > [...]

>
> That's related to #1040062, the best fix that does not involve touching dpkg is:

Thanks Adrian! I'll apply this patch.

Best wishes,

Julian