ocamlc -I +compiler-libs -bin-annot  -c big_int_Z.ml
ocamlmklib -failsafe -o zarith z.cmo q.cmo big_int_Z.cmo -Wl,-Bsymbolic-functions -Wl,-z,relro -lgmp
Unknown option -Wl,-Bsymbolic-functions
Unknown option -Wl,-z,relro
gcc -DZ_OCAML_LEGACY_CUSTOM_OPERATIONS -DZ_OCAML_HASH -DZ_OCAML_COMPARE_EXT -DHAS_GMP -DZ_ELF -DZ_DOT_LABEL_PREFIX   -D_FORTIFY_SOURCE=2  -c -o caml_z_x86_64.o caml_z_x86_64.S
ocamlc -ccopt "-I/usr/lib/ocaml -D_FORTIFY_SOURCE=2 -DZ_OCAML_LEGACY_CUSTOM_OPERATIONS -DZ_OCAML_HASH -DZ_OCAML_COMPARE_EXT -DHAS_GMP -DZ_ELF -DZ_DOT_LABEL_PREFIX  -O3 -Wall -Wextra -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security" -c caml_z.c
caml_z.c: In function ‘ml_z_fac2’:
caml_z.c:2987:3: warning: implicit declaration of function ‘mpz_2fac_ui’ [-Wimplicit-function-declaration]
caml_z.c: In function ‘ml_z_facM’:
caml_z.c:3002:3: warning: implicit declaration of function ‘mpz_mfac_uiui’ [-Wimplicit-function-declaration]
caml_z.c: In function ‘ml_z_primorial’:
caml_z.c:3017:3: warning: implicit declaration of function ‘mpz_primorial_ui’ [-Wimplicit-function-declaration]
ocamlmklib -failsafe -o zarith caml_z_x86_64.o caml_z.o -Wl,-Bsymbolic-functions -Wl,-z,relro -lgmp
Unknown option -Wl,-Bsymbolic-functions
Unknown option -Wl,-z,relro
ocamlc -I +compiler-libs -bin-annot  -c zarith_top.ml
ocamlc -o zarith_top.cma -a zarith_top.cmo
ocamlopt -I +compiler-libs  -c z.ml
ocamlopt -I +compiler-libs  -c q.ml
ocamlopt -I +compiler-libs  -c big_int_Z.ml
ocamlmklib -failsafe -o zarith z.cmx q.cmx big_int_Z.cmx -Wl,-Bsymbolic-functions -Wl,-z,relro -lgmp
Unknown option -Wl,-Bsymbolic-functions
Unknown option -Wl,-z,relro
ocamlopt -shared -o zarith.cmxs -I . zarith.cmxa -linkall
make[1]: Leaving directory `/<<PKGBUILDDIR>>'
   debian/rules override_dh_auto_test
make[1]: Entering directory `/<<PKGBUILDDIR>>'
/usr/bin/make tests
make[2]: Entering directory `/<<PKGBUILDDIR>>'
make -C tests test
make[3]: Entering directory `/<<PKGBUILDDIR>>/tests'
ocamlopt -I .. -ccopt "-L.." zarith.cmxa nums.cmxa -o zq.exe zq.ml
../libzarith.a(caml_z.o): In function `ml_z_fac2':
/<<PKGBUILDDIR>>/caml_z.c:2987: undefined reference to `mpz_2fac_ui'
../libzarith.a(caml_z.o): In function `ml_z_facM':
/<<PKGBUILDDIR>>/caml_z.c:3002: undefined reference to `mpz_mfac_uiui'
../libzarith.a(caml_z.o): In function `ml_z_primorial':
/<<PKGBUILDDIR>>/caml_z.c:3017: undefined reference to `mpz_primorial_ui'
collect2: ld returned 1 exit status
File "caml_startup", line 1:
Error: Error during linking
make[3]: *** [zq.exe] Error 2
make[3]: Leaving directory `/<<PKGBUILDDIR>>/tests'
make[2]: *** [tests] Error 2
make[2]: Leaving directory `/<<PKGBUILDDIR>>'
make[1]: *** [override_dh_auto_test] Error 2
make[1]: Leaving directory `/<<PKGBUILDDIR>>'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2