Bug#1102195: boost1.88 ftbfs on sparc64

Package: src:boost1.88
Version: 1.88.0~beta1-1~exp1
Severity: important
X-Debbugs-CC: [email protected]

Also the -mcpu=v7 looks suspicious.

[...]
     "g++" -x assembler-with-cpp -fPIC -m64 -pthread -O3 
-finline-functions -Wno-inline -Wall -g -fvisibility=hidden -Wdate-time 
-D_FORTIFY_SOURCE=2 -mcpu=v7  -DBOOST_ALL_NO_LIB=1 
-DBOOST_COBALT_USE_STD_PMR=1 -DBOOST_CONTEXT_DYN_LINK=1 
-DBOOST_CONTEXT_NO_LIB=1 -DBOOST_CONTEXT_SOURCE -DBOOST_DISABLE_ASSERTS 
-DNDEBUG -I"." 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/assert/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/context/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/core/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/integer/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/mp11/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/pool/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/predef/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/smart_ptr/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/throw_exception/include" 
-I"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/winapi/include" 
-c -o 
"bin.v2/libs/context/build/gcc-14/release/sparc_64/debug-symbols-on/threading-multi/visibility-hidden/asm/ontop_sparc64_sysv_elf_gas.o" 
"/build/reproducible-path/boost1.88-1.88.0~beta1/libs/context/src/asm/ontop_sparc64_sysv_elf_gas.S"

/tmp/ccnn9sm2.s: Assembler messages:
/tmp/ccnn9sm2.s: Error: .size expression for jump_fcontext does not 
evaluate to a constant
...failed gcc.compile.asm 
bin.v2/libs/context/build/gcc-14/release/sparc_64/debug-symbols-on/threading-multi/visibility-hidden/asm/ontop_sparc64_sysv_elf_gas.o...
gcc.compile.c++ 
bin.v2/libs/url/build/gcc-14/release/sparc_64/debug-symbols-on/threading-multi/visibility-hidden/rfc/detail/ipv6_addrz_rule.o