91 FTBFS packages on riscv64 without patch
delve_1.27.1-4 
kf6-kmime_6.28.0-3 
octave-mapping_1.4.3-3 
python-ptrace_0.9.9-0.3#1087588 - python-ptrace: FTBFS on riscv64: OverflowError: Python int too large to convert to C long
xtrs_4.9d-4 
golang-github-coreos-discovery-etcd-io_2.0.0+git2019.04.19.git.78fb45d3c9-4 
mshr_2019.2.0~git20230811.ff54a68+dfsg1-9 
nageru_2.3.3-1#1144032 - nageru: FTBFS with ffmpeg 9.0
scikit-bio-binaries_1.1.0-2 
trilinos_16.1.0-5#1143799 - trilinos: FTBFS: The Open MPI wrapper compiler was unable to find the specified compiler gfortran-15 in your PATH.
dav2d_0.0.1-1 
manif_0.0.5-6#1136247 - manif: FTBFS with libeigen3-dev 5.0 (major version transition)
opensnitch_1.6.9-4#1108846 - opensnitch: fix loongarch/riscv build
rust-jemalloc-sys_0.3.2-2.1#1018724 - rust-jemalloc-sys FTBFS on riscv64(gc)
udev-hid-bpf_2.3.0.20260703.4.gef5fbe3-1 
libembperl-perl_2.5.0-17#1042845 - libembperl-perl: FTBFS with Perl 5.38: test failures
#1137057 - libembperl-perl: FTBFS in bookworm
ocaml-caqti_3.0.0-2 
tiny_0.13.0-2 
vg_1.59.0+ds-0.1#976511 - vg: FTBFS on arm64: configure: error: Could not find a version of the library!
#1089275 - vg: FTBFS with make 4.4.1
#1113618 - vg: FTBFS with CMake 4
lua-struct_0.3-2 
lua-vips_1.1.12-2#1073143 - lua-vips: Bus error in lua jit during tests
rust-subversion_0.1.12-1#1103725 - rust-subversion: FTBFS on many archs: expected raw pointer *const u8, found *const i8
zsv_1.3.0-4 
mercurial_7.2.4-1#1052811 - mercurial: test-http-bad-server.t intermittent failure
#1069407 - mercurial: FTBFS on arm64: dh_auto_test: error: make -j4 check PYTHON=python3 "TESTFLAGS=--verbose --timeout 1800 --jobs 4 --blacklist /<>/debian/mercurial.test_blacklist" returned exit code 2
#1073270 - mercurial: FTBFS on hppa - test-bundle.t output changed
#1074678 - mercurial: FTBFS: dh_auto_test: error: make -j8 check PYTHON=python3 "TESTFLAGS=--verbose --timeout 1800 --jobs 8 --blacklist /<>/debian/mercurial.test_blacklist" returned exit code 2
ovito_3.15.4~ds-1#1141106 - ovito: FTBFS due to using deprecated Qt6 build dependencies
#1143685 - ovito: FTBFS: collect2: error: ld returned 1 exit status
#1144023 - ovito: FTBFS with ffmpeg 9.0
rapmap_0.15.0+dfsg-5#976588 - rapmap: FTBFS on arm64 (when trying to build arch:all)
rust-criterion-cycles-per-byte_0.6.1-1 
pwru_1.0.5+ds1-5 
regina-normal_7.4.1-1.2#1133619 - regina-normal: ftbfs with GCC-16
rust-mach-o-sys_0.1.1-3#953285 - rust-mach-o-sys fails on architectures with unsigned char
#976484 - rust-mach-o-sys: unsigned values cannot be negated
bpfilter_0.6.0-2 
bpftune_0.4.2.10.g4712347-1 
pyfftw_0.15.0-1.1#917095 - python3-pyfftw: alignment tests fail on several arches
rust-lv2-sys_2.0.0-1.1 
clang-extract_0.0~git20260224.ac30d66-1#1143647 - clang-extract: FTBFS: /usr/bin/../lib/gcc/x86_64-linux-gnu/16/../../../../include/c++/16/bits/stl_iterator.h:1337:19: error: member access into incomplete type 'const __normal_iterator>'
hmmer_3.4+dfsg-3 
plotsauce_0~0.1-1#1072135 - plotsauce: FTBFS: plotsauce.qbs:11:5 Dependency 'zlib' not found for product 'plotsauce'.
sphde_1.4.0-5.1#1048093 - sphde: Fails to build source after successful build
#1125773 - sphde: FTBFS on arm64: TERM after 150 minutes of inactivity
rust-cee-scape_0.2.0-1 
ufo-filters_0.17.0.76.g691aa0e+dfsg1-2#1113596 - ufo-filters: FTBFS with CMake 4
cpptraj_5.1.0+dfsg-5#1035833 - cpptraj: FTBFS on \!amd64
#1091156 - cpptraj: FTBFS on arm64: make[2]: *** [Makefile:662: summary] Error 4
mpqc_2.3.1-22#1049570 - mpqc: Fails to build binary packages again after successful build
#1075293 - mpqc: ftbfs with GCC-14
tulip_6.0.1+dfsg-3.1#793137 - tulip should build depend on libqt5opengl5-desktop-dev instead of libqt5opengl5-dev
#1143814 - tulip builds with -march=native
uncalled_2.3+ds-3#1144002 - uncalled: FTBFS: /usr/bin/x86_64-linux-gnu-ld.bfd: cannot find -lhdf5: No such file or directory
abpoa_1.5.6-1 
genimage_20-1 
iisignature_0.23+git20260603.447577b+ds-1 
simint_0.7-2#1140342 - simint: FTBFS almost everywhere
guile-2.2_2.2.7+1-9#1102305 - guile-2.2: FTBFS: flaky tests
#1105419 - guile-2.2: FTBFS with make --shuffle=reverse: make[1]: *** [debian/rules:259: override_dh_install-arch] Error 1 shuffle=reverse
llvm-toolchain-19_1:19.1.7-22#1142869 - llvm-toolchain-19: FTBFS: fatal error: 'linux/scc.h' file not found
bwa-mem2_2.3+ds-1 
drawterm_20240821-0.1#1126330 - drawterm: FTBFS on non x86: (cd posix-$arch && make) - "can't cd to posix-..."
pyemd_0.5.1.54.g802fa86-2#1080277 - FTBFS with setuptools >= 72: error: invalid command 'test'
rust-generator_0.7.1-1.1#1003070 - rust-generator should not claim to build on "any" as upstream only supports amd64/arm64
dmrgpp_6.06-2#1096531 - dmrgpp: ftbfs with GCC-15
lfortran_0.65.0-1#1146403 - lfortran FTBFS on !amd64/arm64
python-gammu_3.2.4-4#1146036 - python-gammu: FTBFS: ERROR: test_inject (test.test_smsd.SMSDDummyTest.test_inject)
freehsm-c_2.0.0-1#1144631 - freehsm-c FTBFS on non-x86: cc1: error: ‘-fcf-protection=full’ is not supported for this target
libhdate_1.6.02-2.1#1045497 - libhdate: Fails to build source after successful build
#1102875 - libhdate: add perl-xs-dev to Build-Depends
mariadb-connector-python_1.1.14-2#1146617 - mariadb-connector-python: FTBFS: IndexError: list index out of range
r-bioc-hdf5array_1.34.0-3#1135462 - r-bioc-hdf5array: FTBFS: h5mread_startscounts.c:405:29: error: implicit declaration of function 'DATAPTR'; did you mean 'DATAPTR_RO'? [-Wimplicit-function-declaration]
xemacs21_21.4.24-12#1075659 - xemacs21: ftbfs with GCC-14
aj-snapshot_0.9.9-4#1093685 - aj-snapshot: FTBFS with mxml 4.0.3
anytun_0.3.8-1.1#1127165 - anytun: libboost-system-dev package is obsolete with boost 1.89 and newer
broker_1.4.0+ds1-1#1037597 - broker: ftbfs with GCC-13
#1112758 - broker: FTBFS with CMake 4
coq-corn_8.20.0-1#1143292 - coq-corn: FTBFS: dh_auto_build: error: make -j2 INSTALL="install --strip-program=true" returned exit code 2
coq-relation-algebra_1.7.11-1#1143295 - coq-relation-algebra: FTBFS: findlib error: coq-core.plugins.ltac not found in:
frama-c_20220511-manganese-5#1044539 - frama-c: Fails to build source after successful build
#1093102 - frama-c: FTBFS with OCaml 5.3.0 (syntax error due to new "effect" keyword)
gpyfft_0.7.1-3#1120241 - gpyfft: FTBFS: AttributeError: module 'gpyfft.gpyfftlib' has no attribute 'CLFFT_DOUBLE'
libomemo_0.8.1-3#1131332 - libomemo: FTBFS with mxml 4
libpreludedb_5.2.0-2.2#1047160 - libpreludedb: Fails to build source after successful build
#1049794 - libpreludedb: Fails to build binary packages again after successful build
#1080884 - libpreludedb: Missing Build-Depends on python3-setuptools
libpwiz_3.0.18342-4.2#1110624 - libpwiz ftbfs with boost 1.88
#1127228 - libpwiz: libboost-system-dev package is obsolete with boost 1.89 and newer
libvirt-php_0.5.8-7#1106642 - libvirt-php ftbfs with libxml 2.14.x from experimental
linphone_5.3.105-6#1119745 - linphone: FTBFS: /<>/src/db/main-db.cpp:1530:58: error: use of deleted function 'soci::details::use_container soci::use(T&&, const std::string&) [with T = long long int; std::string = std::__cxx11::basic_string]'
nlopt_2.7.1-7.1 
octave-video_2.1.3-3#1115036 - octave-video: FTBFS with ffmpeg 8.0
#1132464 - octave-video: prevents upgrade of octave and related packages
openms_2.6.0+cleaned1-6#1133596 - openms: ftbfs with GCC-16
#1136312 - openms: FTBFS with libeigen3-dev 5.0 (major version transition)
python-backports.zstd_1.7.0+ds-2 
python-cython-blis_1.0.0-2#1097676 - python-cython-blis: ftbfs with GCC-15
python-escript_5.6-10 
safe-hole-perl_0.14-1.1 
scram_0.16.2-4#1129858 - scram: FTBFS with boost 1.90
sdml_0.3.2+20250310-7#1140282 - sdml: FTBFS: error: failed to select a version for the requirement `tree-sitter = "^0.25"`
siconos_4.4.0+dfsg-6#1020544 - siconos: FTBFS on s390x: Cholesky solve kNM_test failed
#1046177 - siconos: Fails to build source after successful build
#1136873 - siconos: FTBFS: E ValueError: setting an array element with a sequence.
#1146238 - siconos: FTBFS with swig 4.5.0
silver-platter_0.8.3-3 
solarpowerlog_0.26-1#1110665 - solarpowerlog ftbfs with boost 1.88
#1127284 - solarpowerlog: libboost-system-dev package is obsolete with boost 1.89 and newer
stdgpu_1.3.0+git20220507.32e0517-6#1119033 - stdgpu: FTBFS with libamdhip64-dev 6.4.3
swift-im_5.0~alpha2.145.g12d031cf8+dfsg-5#1127287 - swift-im: libboost-system-dev package is obsolete with boost 1.89 and newer
tiledarray_1.0.0-1#1087560 - tiledarray: FTBFS: missing cstdint include
xpra_3.1.5+dfsg1-0.2#1067627 - FTBFS: error: comparison of integer expressions of different signedness: ‘long unsigned int’ and ‘long int’
#1072463 - xpra: FTBFS with ffmpeg 7.0: xpra/codecs/enc_ffmpeg/encoder.c:11208:115: error: passing argument 6 of ‘avio_alloc_context’ from incompatible pointer type [-Werror=incompatible-pointer-types]
lightningcss_1.33.0+ds-5#1146269 - lightningcss: FTBFS: error[E0308]: mismatched types
20 FTBFS packages on riscv64 with a patch pending
epics-base_7.0.8.1+dfsg1-10#1079604 - epics-base:FTBFS:build failure (not support riscv64)
gnucap-python_0.0.2-1.2#1067335 - gnucap-python: FTBFS: _gnucap_swig.cxx:4535:10: fatal error: numpy/arrayobject.h: No such file or directory
gudhi_3.11.0+dfsg-2#1136238 - gudhi: FTBFS with libeigen3-dev 5.0 (major version transition)
libgrokj2k_10.0.5-1#1085165 - libgrokj2k: FTBFS on armhf: ‘vreinterpret_f16_u16’ was not declared in this scope
libprelude_5.2.0-5.6#1080647 - Missing Build-Depends on python3-setuptools
#1081473 - FTBFS with Python 3.13
libselinux_3.11-2#1145457 - libselinux: FTBFS: selinuxswig_python_wrap.c:6646:34: error: implicit declaration of function 'PyString_FromString'; did you mean 'PyLong_FromString'? [-Wimplicit-function-declaration]
libyuv_0.0.1971.20260904-1#1147168 - libyuv: FTBFS on riscv64 with vector extension
llvm-toolchain-18_1:18.1.8-20#1147122 - llvm-toolchain-18: FTBFS against python 3.15rc2 and other problems
mono_6.14.1+ds2-3#1045158 - mono: Fails to build source after successful build
numba_0.65.1+dfsg-3#1144999 - numba: FTBFS building against python 3.15
opendht_3.0.1-1.1#1138404 - opendht: FTBFS with openssl 4.0
#1146596 - opendht: FTBFS against python 3.15rc1
pandas_2.3.3+dfsg-3#1144864 - pandas: FTBFS building against python 3.15
pixmap_2.6.6-1#1054698 - pixmap: FTBFS: ././Pixmap.c:1145:(.text+0xe631): undefined reference to `xpmReadRgbNames'
python-cx-oracle_8.3.0-3#1137169 - python-cx-oracle FTBFS: error: implicit declaration of function ‘dpiConn_beginDistribTrans’
python-lua_1.0-1#1114309 - python-lua: FTBFS: module.h:94:13: error: 'bool' cannot be defined via 'typedef'
r-cran-hdf5r_1.3.12+dfsg-3#1139545 - r-cran-hdf5r: FTBFS against HDF5 2.1.0 - implicit declaration of function ‘H5FD_family_init’
s2geometry_0.10.0-6.1#1146589 - s2geometry: FTBFS against python 3.14 and 3.15rc1
scrollz_2.2.3-2#1066483 - scrollz: FTBFS: configure: error: Fatal: You must get working getaddrinfo() function.
tinyarray_1.2.5-1#1146590 - tinyarray: FTBFS on arm64
xraylib_4.3.0+dfsg-1#1146624 - xraylib: FTBFS on riscv64: 43/61 xraylib:python-crystal_diffraction-threaded TIMEOUT 10.11s killed by signal 15 SIGTERM