[Bug 261180] devel/ocaml-opam: does not build on ARM

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261180

--- Comment #12 from Stefan Grundmann <sg2342@googlemail.com> ---
after more testing on arm.armv7 and arm64.aarch64 it seems that while the
attached patch is not sufficient to fix the build it is a step in the right
direction.

1. unmodified devel/ocaml-opam:

1.1 arm64.aarch64 FreeBSD 13 fails:
gmake[5]: *** No rule to make target 'aarch64.o', needed by 'libasmrun.a'.

1.2 arm.armv7 FreeBSD 13 fails:
gmake[5]: *** No rule to make target 'armv7.o', needed by 'libasmrun.a'.



2. with NOPRECIOUSMAKEVARS=yes in Makefile

2.1 arm64.aarch64 FreeBSD 13 succeeds

2.2 arm.armv7 FreeBSD 13 fails:
Makefile:920: *** The native-code compiler is not supported on this platform.


3. with NOPRECIOUSMAKEVARS=yes in Makefile and applied patch

3.1 arm64.aarch64 FreeBSD 13 succeeds

3.2 arm.armv7 FreeBSD 13 fails:
ld: error: can't create dynamic relocation R_ARM_ABS32 against symbol:
caml_program in readonly segment; recompile object files with -fPIC or pass
'-Wl,-z,notext' to allow text relocations in the output
>>> defined in arm_libasmrunpic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1D0)

ld: error: can't create dynamic relocation R_ARM_ABS32 against symbol:
Caml_state in readonly segment; recompile object files with -fPIC or pass
'-Wl,-z,notext' to allow text relocations in the output
>>> defined in domain.npic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1D4)

ld: error: can't create dynamic relocation R_ARM_ABS32 against local symbol in
readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to
allow text relocations in the output
>>> defined in arm_libasmrunpic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1D8)

ld: error: can't create dynamic relocation R_ARM_ABS32 against symbol:
caml_apply2 in readonly segment; recompile object files with -fPIC or pass
'-Wl,-z,notext' to allow text relocations in the output
>>> defined in arm_libasmrunpic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1DC)

ld: error: can't create dynamic relocation R_ARM_ABS32 against symbol:
caml_apply3 in readonly segment; recompile object files with -fPIC or pass
'-Wl,-z,notext' to allow text relocations in the output
>>> defined in arm_libasmrunpic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1E0)

ld: error: can't create dynamic relocation R_ARM_ABS32 against symbol:
caml_array_bound_error in readonly segment; recompile object files with -fPIC
or pass '-Wl,-z,notext' to allow text relocations in the output
>>> defined in fail_nat.npic.o
>>> referenced by arm_libasmrunpic.o:(.text+0x1E4)
cc: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[5]: *** [Makefile:311: libasmrun_shared.so] Error 1

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