not really a bug .. is there a way to set the host type in the Makefile.am ?

[Dennis Clarke]

This may seem like a strange question but I am running into many
problems while trying to build gcc 8.2.0 for a RISC-V target. With
a cross compiler toolset I am easily able to create output ELF files
for the rv64gc architecture and so that is not a problem. However that
is only possible ( thus far ) when building gmp separately. The gcc code
requires that I extract the gmp/mpfr/mpc sources inside the gcc sources
tree and then build/bootstrap gcc which in turns rebuilds gmp all over
again.  Regardless if it is pre-installed elsewhere or not.

When I build gmp separately for the RISC-V target I can do this :

$ ../gmp-6.1.2/configure ABI=standard \
> --enable-cxx --prefix=/home/dclarke/rv64g_local \
> --libdir=/home/dclarke/rv64g_local/lib \
> --build=x86_64-unknown-freebsd12.0 \
> --host=riscv64-unknown-freebsd12.0 --disable-assembly

Configure runs fine and I see :


configure: summary of build options:

  Version:           GNU MP 6.1.2
  Host type:         riscv64-unknown-freebsd12.0
  ABI:               standard
  Install prefix:    /home/dclarke/rv64g_local
  Compiler:          /opt/tools/bin/riscv64-unknown-freebsd12.0-gcc
  Static libraries:  yes
  Shared libraries:  yes

Which does result in proper output ELF files ready for the RISC-V arch.
Great.

However within the build process of gcc I see this fly by in the compile
output :


configure: summary of build options:

  Version:           GNU MP 6.1.2
  Host type:         none-unknown-freebsd12.0
  ABI:               standard
  Install prefix:    /usr/local/gcc8
  Compiler:          riscv64-unknown-freebsd12.0-gcc
  Static libraries:  yes
  Shared libraries:  no

That is wrong.

The "Host type" should be "riscv64-unknown-freebsd12.0" and so the whole
gmp compile stage ( within gcc build ) completes just fine and then mpfr
fails with this :

.
.
.
libtool: link: /usr/local/bin/ranlib .libs/libgmp.a
libtool: link: rm -fr .libs/libgmp.lax
libtool: link: ( cd ".libs" && rm -f "libgmp.la" && ln -s "../libgmp.la"
"libgmp.la" )
gmake[4]: Leaving directory
'/usr/home/dclarke/rv64g_local/build/gcc-8.2.0_rv64imafdc.008/gmp'
gmake[3]: Leaving directory
'/usr/home/dclarke/rv64g_local/build/gcc-8.2.0_rv64imafdc.008/gmp'
gmake[2]: Leaving directory
'/usr/home/dclarke/rv64g_local/build/gcc-8.2.0_rv64imafdc.008/gmp'
mkdir ./mpfr
Configuring in ./mpfr
configure: creating cache ./config.cache
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for riscv64-unknown-freebsd12.0-strip... /usr/local/bin/strip
checking for a thread-safe mkdir -p... ../../gcc-8.2.0/mpfr/install-sh -c -d
checking for gawk... /usr/local/bin/gawk
checking whether /usr/local/bin/gmake sets $(MAKE)... yes
checking whether /usr/local/bin/gmake supports nested variables... yes
checking whether to enable maintainer-specific portions of Makefiles... yes
checking build system type... x86_64-unknown-freebsd12.0
checking host system type... riscv64-unknown-freebsd12.0
checking for grep that handles long lines and -e... /usr/local/bin/grep
checking for egrep... /usr/local/bin/grep -E
checking for a sed that does not truncate output... /usr/local/bin/gsed
checking whether configure options are compatible... yes
checking for riscv64-unknown-freebsd12.0-gcc...
riscv64-unknown-freebsd12.0-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... yes
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether riscv64-unknown-freebsd12.0-gcc accepts -g... yes
checking for riscv64-unknown-freebsd12.0-gcc option to accept ISO C89...
none needed
checking whether riscv64-unknown-freebsd12.0-gcc understands -c and -o
together... yes
checking whether /usr/local/bin/gmake supports the include directive...
yes (GNU style)
checking dependency style of riscv64-unknown-freebsd12.0-gcc... gcc3
checking how to run the C preprocessor... riscv64-unknown-freebsd12.0-gcc -E
checking for riscv64-unknown-freebsd12.0-ar... /usr/local/bin/ar
checking the archiver (/usr/local/bin/ar) interface... ar
checking how to print strings... printf
checking for a sed that does not truncate output... (cached)
/usr/local/bin/gsed
checking for fgrep... /usr/local/bin/grep -F
checking for ld used by riscv64-unknown-freebsd12.0-gcc... /usr/local/bin/ld
checking if the linker (/usr/local/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)...
riscv64-unknown-freebsd12.0-nm
checking the name lister (riscv64-unknown-freebsd12.0-nm) interface...
BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 196608
checking how to convert x86_64-unknown-freebsd12.0 file names to
riscv64-unknown-freebsd12.0 format... func_convert_file_noop
checking how to convert x86_64-unknown-freebsd12.0 file names to
toolchain format... func_convert_file_noop
checking for /usr/local/bin/ld option to reload object files... -r
checking for riscv64-unknown-freebsd12.0-objdump... /usr/local/bin/objdump
checking how to recognize dependent libraries... pass_all
checking for riscv64-unknown-freebsd12.0-dlltool...
riscv64-unknown-freebsd12.0-dlltool
checking how to associate runtime and link libraries... printf %s\n
checking for riscv64-unknown-freebsd12.0-ar... (cached) /usr/local/bin/ar
checking for archiver @FILE support... @
checking for riscv64-unknown-freebsd12.0-strip... (cached)
/usr/local/bin/strip
checking for riscv64-unknown-freebsd12.0-ranlib... /usr/local/bin/ranlib
checking command to parse riscv64-unknown-freebsd12.0-nm output from
riscv64-unknown-freebsd12.0-gcc object... ok
checking for sysroot... /riscv64/rootfs
checking for a working dd... /bin/dd
checking how to truncate binary pipes... /bin/dd bs=4096 count=1
checking for riscv64-unknown-freebsd12.0-mt... no
checking for mt... mt
configure: WARNING: using cross tools not prefixed with host triplet
checking if mt is a manifest tool... no
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if riscv64-unknown-freebsd12.0-gcc supports -fno-rtti
-fno-exceptions... no
checking for riscv64-unknown-freebsd12.0-gcc option to produce PIC...
-fPIC -DPIC
checking if riscv64-unknown-freebsd12.0-gcc PIC flag -fPIC -DPIC
works... yes
checking if riscv64-unknown-freebsd12.0-gcc static flag -static works... yes
checking if riscv64-unknown-freebsd12.0-gcc supports -c -o file.o... yes
checking if riscv64-unknown-freebsd12.0-gcc supports -c -o file.o...
(cached) yes
checking whether the riscv64-unknown-freebsd12.0-gcc linker
(/usr/local/bin/ld) supports shared libraries... yes
checking dynamic linker characteristics... freebsd12.0 ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... no
checking whether to build static libraries... yes
checking format of `double' floating point... configure: WARNING: format
of `double' floating-point not recognized
checking for ICC... no
checking for an ANSI C-conforming const... yes
checking for working volatile... yes
checking whether byte ordering is bigendian... no
checking for main in -lm... yes
checking for main in -lquadmath... no
checking whether time.h and sys/time.h may both be included... yes
checking for size_t... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking float.h usability... yes
checking float.h presence... yes
checking for float.h... yes
checking for string.h... (cached) yes
checking locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking wchar.h usability... yes
checking wchar.h presence... yes
checking for wchar.h... yes
checking stdarg.h usability... yes
checking stdarg.h presence... yes
checking for stdarg.h... yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking sys/fpu.h usability... no
checking sys/fpu.h presence... no
checking for sys/fpu.h... no
checking for struct lconv.decimal_point... yes
checking for struct lconv.thousands_sep... yes
checking for working alloca.h... no
checking for alloca... yes
checking how to copy va_list... va_copy
checking for memmove... yes
checking for memset... yes
checking for setlocale... yes
checking for strtol... yes
checking for gettimeofday... yes
checking for signal... yes
checking for sigaction and its associated structure... yes
checking for long long int... yes
checking for intmax_t... yes
checking for working INTMAX_MAX... yes
checking for working printf length modifier for intmax_t... j
checking for union fpc_csr... no
checking for _Noreturn... yes
checking for __builtin_unreachable... yes
checking for constructor and destructor attributes... yes
checking for fesetround... yes
checking for gcc float-conversion bug... cannot test, use -ffloat-store
checking for subnormal double-precision numbers... cannot test, assume no
checking for subnormal single-precision numbers... cannot test, assume no
checking for signed zeros... cannot test, assume no
checking if the FP division by 0 fails... cannot test, assume no
checking if NAN == NAN... cannot test, assume no
checking if charset has consecutive values... cannot test
checking for math/round... yes
checking for math/trunc... yes
checking for math/floor... yes
checking for math/ceil... yes
checking for math/nearbyint... yes
checking for _mulx_u64... cannot test, assume no
checking for long double... yes
checking format of `long double' floating point... IEEE quad, little endian
checking for TLS support using C11... cannot test, assume no
checking for TLS support... cannot test, assume no
checking if __float128 with hex constants is supported... no
checking for Static Assertion support... yes
checking for library containing clock_gettime... none required
checking for gmp.h... yes
checking whether gcc __attribute__ ((mode (XX))) works... yes
checking for recent GMP... yes
checking usable gmp.h at link time... yes
checking for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency... cannot test
checking for __gmpz_init in -lgmp... no
configure: error: libgmp not found or uses a different ABI (including
static vs shared).
Please read the INSTALL file -- see "In case of problem".
gmake[1]: *** [Makefile:5139: configure-mpfr] Error 1
gmake[1]: Leaving directory
'/usr/home/dclarke/rv64g_local/build/gcc-8.2.0_rv64imafdc.008'
gmake: *** [Makefile:906: all] Error 2
vesta_$

Very annoying given that the gmp library archive was just created
moments ago within the gcc build process. Wrongly.

So the question is ... can I edit the gmp Makefile.in/Makefile.am files
to force the correct "Host type" --host=riscv64-unknown-freebsd12.0 data
in there?

-- 
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional

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