Re: Configure error when building glibc for RISC V

[Palmer Dabbelt <palmer at sifive dot com>]

On Wed, 03 Apr 2019 01:13:55 PDT (-0700), pinskia@gmail.com wrote:
> On Wed, Apr 3, 2019 at 12:54 AM Cheruvu Ghalib Khan
> <cghalibkhan@gmail.com> wrote:
> > Hello,
> > Am trying to build the library for RISCV.
> > With following sources,
> > Have taken glibc-2.27.tar.xz & glibc-2.29.tar.xz
> > Linux headers linux-4.15.1

This should work: we have arch_minimum_kernel=4.15.0 in our glibc port, and 
IIRC we 

> How did you generate the kernel headers?
> Maybe that is the issue.

That's what I'd guess.

> The kernel headers that are included with that github is 4.13.0.
> Also look into config.log to see what it shows.

The github version is a pre-upstream glibc port because it still has the 32-bit 
port and we need that to run the GCC test suite.  It's not the right place to 
look for the real glibc, it's really a toolchain test/integration repository.

> Thanks,
> Andrew Pinski
>
>
> > RISCV toolchain is built from instructions in
> > https://github.com/riscv/riscv-gnu-toolchain,(make linux).
> >
> > But facing an Error, I can't able to sort it out, please help me out.
> >
> > Following is the command,log and error:
> >
> > $ ~/Downloads/glibc-2.27/Build$ ../configure \
> > > CC="riscv64-unknown-linux-gnu-gcc " \
> > > CXX="riscv64-unknown-linux-gnu-g++ " \
> > > CFLAGS=" -mcmodel=medlow -g -O2 " \
> > > CXXFLAGS=" -mcmodel=medlow -g -O2 " \
> > > ASFLAGS=" -mcmodel=medlow " \
> > > --host=riscv64-unknown-linux-gnu \
> > > --prefix=/home/ghalib/ws/Build-ETC/RGT-Linux-with-makefile/Exe-ETC-linux-elf/riscv64-linux-elf \
> > > --disable-werror \
> > > --enable-shared \
> > > --enable-obsolete-rpc \
> > > --with-headers=/home/ghalib/ws/Build-ETC/RGT-Linux-with-makefile/linux-headers/include \
> > > --disable-multilib \
> > > --libdir=/home/ghalib/ws/Build-ETC/RGT-Linux-with-makefile/Exe-ETC-linux-elf/sysroot/usr/lib libc_cv_slibdir=/home/ghalib/ws/Build-ETC/RGT-Linux-with-makefile/Exe-ETC-linux-elf/lib libc_cv_rtlddir=/home/ghalib/ws/Build-ETC/RGT-Linux-with-makefile/Exe-ETC-linux-elf/lib
> > checking build system type... x86_64-pc-linux-gnu
> > checking host system type... riscv64-unknown-linux-gnu
> > checking for riscv64-unknown-linux-gnu-gcc... riscv64-unknown-linux-gnu-gcc
> > checking for suffix of object files... o
> > checking whether we are using the GNU C compiler... yes
> > checking whether riscv64-unknown-linux-gnu-gcc  accepts -g... yes
> > checking for gcc... gcc
> > checking for riscv64-unknown-linux-gnu-readelf...
> > riscv64-unknown-linux-gnu-readelf
> > checking whether we are using the GNU C++ compiler... yes
> > checking whether riscv64-unknown-linux-gnu-g++  accepts -g... yes
> > checking whether riscv64-unknown-linux-gnu-g++  can link programs... yes
> > checking for sysdeps preconfigure fragments... aarch64 alpha arm hppa
> > i386 m68k microblaze mips nios2 powerpc riscv s390 sh sparc tile
> > x86_64
> > checking for use of fpu sysdeps directories... yes
> > checking for -fstack-protector... yes
> > checking for -fstack-protector-strong... yes
> > checking for -fstack-protector-all... yes
> > checking for assembler and linker STT_GNU_IFUNC support... no
> > checking for gcc attribute ifunc support... no
> > checking if compiler warns about alias for function with incompatible
> > types... yes
> > configure: WARNING: gcc emits a warning for alias between functions of
> > incompatible types
> > configure: WARNING: Multi-arch is disabled.
> > checking sysdep dirs... sysdeps/unix/sysv/linux/riscv/rv64
> > sysdeps/unix/sysv/linux/riscv sysdeps/riscv/nptl
> > sysdeps/unix/sysv/linux/generic sysdeps/unix/sysv/linux/wordsize-64
> > sysdeps/unix/sysv/linux sysdeps/nptl sysdeps/pthread sysdeps/gnu
> > sysdeps/unix/inet sysdeps/unix/sysv sysdeps/unix sysdeps/posix
> > sysdeps/riscv/rv64/rvd sysdeps/riscv/rv64/rvf sysdeps/riscv/rvf
> > sysdeps/riscv/rvd sysdeps/riscv/rv64 sysdeps/riscv sysdeps/init_array
> > sysdeps/ieee754/ldbl-128 sysdeps/ieee754/dbl-64 sysdeps/ieee754/flt-32
> > sysdeps/wordsize-64 sysdeps/ieee754 sysdeps/generic
> > checking for a BSD-compatible install... /usr/bin/install -c
> > checking whether ln -s works... yes
> > checking whether
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/as
> > is GNU as... yes
> > checking whether
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/ld
> > is GNU ld... yes
> > checking for /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/as...
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/as
> > checking version of
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/as...
> > 2.31.1, ok
> > checking for /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/ld...
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/ld
> > checking version of
> > /home/ghalib/ws/Build-RGT/riscv-gnu-toolchain/Exe/Exe-RGT-Linux/bin/../lib/gcc/riscv64-unknown-linux-gnu/8.2.0/../../../../riscv64-unknown-linux-gnu/bin/ld...
> > 2.31.1, ok
> > checking for gnumake... no
> > checking for gmake... no
> > checking for make... make
> > checking version of make... 4.1, ok
> > checking for gnumsgfmt... no
> > checking for gmsgfmt... no
> > checking for msgfmt... msgfmt
> > checking version of msgfmt... 0.19.7, ok
> > checking for makeinfo... makeinfo
> > checking version of makeinfo... 6.1, ok
> > checking for sed... sed
> > checking version of sed... 4.2.2, ok
> > checking for gawk... gawk
> > checking version of gawk... 4.1.3, ok
> > checking for bison... bison
> > checking version of bison... 3.0.4, ok
> > checking if riscv64-unknown-linux-gnu-gcc  is sufficient to build libc... yes
> > checking for riscv64-unknown-linux-gnu-nm... riscv64-unknown-linux-gnu-nm
> > checking for python3... python3
> > checking LD_LIBRARY_PATH variable... ok
> > checking for bash... /bin/bash
> > checking for perl... /usr/bin/perl
> > checking for install-info... /usr/bin/install-info
> > checking for .set assembler directive... yes
> > checking linker support for protected data symbol... yes
> > checking linker support for INSERT in linker script... yes
> > checking for broken __attribute__((alias()))... no
> > checking whether to put _rtld_local into .sdata section... yes
> > checking whether to use .ctors/.dtors header and trailer... no
> > checking for libunwind-support in compiler... no
> > checking whether --noexecstack is desirable for .S files... yes
> > checking for -z combreloc... yes
> > checking for linker that supports -z execstack... yes
> > checking for linker that supports --no-dynamic-linker... yes
> > checking for -static-pie... yes
> > checking for -fpie... yes
> > checking for --hash-style option... yes
> > checking for sufficient default -shared layout... no
> > checking for GLOB_DAT reloc... no
> > checking linker output format... elf64-littleriscv
> > checking for -fno-toplevel-reorder -fno-section-anchors... yes
> > checking for -mtls-dialect=gnu2... no
> > checking whether cc puts quotes around section names... no
> > checking for __builtin_memset... no
> > checking for redirection of built-in functions... yes
> > checking for compiler option to disable generation of FMA
> > instructions... -ffp-contract=off
> > checking if riscv64-unknown-linux-gnu-gcc  accepts
> > -fno-tree-loop-distribute-patterns with __attribute__
> > ((__optimize__))... yes
> > checking for libgd... no
> > checking for is_selinux_enabled in -lselinux... no
> > checking for _FORTIFY_SOURCE predefine... no
> > checking whether the linker provides working __ehdr_start... yes
> > checking for __builtin_trap with no external dependencies... yes
> > checking whether the C++ compiler supports thread_local... yes
> > running configure fragment for sysdeps/unix/sysv/linux/riscv
> > checking for grep that handles long lines and -e... /bin/grep
> > checking for egrep... /bin/grep -E
> > running configure fragment for sysdeps/unix/sysv/linux
> > checking installed Linux kernel header files... 3.2.0 or later
> > checking for kernel header at least 4.15.0... too old!
> > configure: error: *** The available kernel headers are older than the requested
> > *** compatible kernel version
> >
> > Could you please help us fix the configure error? The same issue is
> > seen with glibc 2.29
> >
> > Thanks in Advance.