It is the symbols file that causes the problem:
dpkg-gensymbols: error: some symbols or patterns disappeared in the symbols
file: see diff output below
--- debian/symbols (libbinio1v5_1.5+dfsg-2_ppc64el)
+++ dpkg-gensymbolssfBs1b 2025-09-15 07:58:57.861346328 +0000
@@ -70,11 +73,11 @@
(c++)"binosstream::putByte(unsigned char)@Base" 1.4+dfsg1
(c++)"binosstream::~binosstream()@Base" 1.4+dfsg1
(c++)"binostream::binostream()@Base" 1.4+dfsg1
- (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::float2ieee_double(__float128, unsigned char*)@Base" 1.4+dfsg1
+#MISSING: 1.5+dfsg-2# (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::float2ieee_double(__float128, unsigned char*)@Base" 1.4+dfsg1
(c++|arch=!alpha !powerpc !powerpcspe !ppc64 !ppc64el !s390x
!sparc)"binostream::float2ieee_double(long double, unsigned char*)@Base"
1.4+dfsg1
- (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::float2ieee_single(__float128, unsigned char*)@Base" 1.4+dfsg1
+#MISSING: 1.5+dfsg-2# (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::float2ieee_single(__float128, unsigned char*)@Base" 1.4+dfsg1
(c++|arch=!alpha !powerpc !powerpcspe !ppc64 !ppc64el !s390x
!sparc)"binostream::float2ieee_single(long double, unsigned char*)@Base"
1.4+dfsg1
- (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::writeFloat(__float128, binio::FType)@Base" 1.4+dfsg1
+#MISSING: 1.5+dfsg-2# (c++|arch=alpha powerpc powerpcspe ppc64 ppc64el s390x
sparc)"binostream::writeFloat(__float128, binio::FType)@Base" 1.4+dfsg1
