unable to install libelf under x86_64 cygwin

[Tim Stowell]

Hi,

I've got crosstools-ng somewhat working under 64-bit Cygwin on
Windows, below is the output I have so far up to the point where it
dies:

$ ct-ng companion_libs_for_host+
[INFO ]  Performing some trivial sanity checks
[INFO ]  Build started 20151222.184656
[INFO ]  Building environment variables
[EXTRA]  Preparing working directories
[INFO ]  Restoring state at step 'companion_libs_for_host', as requested.
[INFO ]  =================================================================
[INFO ]  Installing GMP for host
[EXTRA]    Configuring GMP
[EXTRA]    Building GMP
[EXTRA]    Installing GMP
[INFO ]  Installing GMP for host: done in 491.22s (at 08:48)
[INFO ]  =================================================================
[INFO ]  Installing MPFR for host
[EXTRA]    Configuring MPFR
[EXTRA]    Building MPFR
[EXTRA]    Installing MPFR
[INFO ]  Installing MPFR for host: done in 250.78s (at 12:59)
[INFO ]  =================================================================
[INFO ]  Installing ISL for host
[EXTRA]    Configuring ISL
[EXTRA]    Building ISL
[EXTRA]    Installing ISL
[INFO ]  Installing ISL for host: done in 185.62s (at 16:05)
[INFO ]  =================================================================
[INFO ]  Installing MPC for host
[EXTRA]    Configuring MPC
[EXTRA]    Building MPC
[EXTRA]    Installing MPC
[INFO ]  Installing MPC for host: done in 114.94s (at 18:00)
[INFO ]  =================================================================
[INFO ]  Installing libelf for host
[EXTRA]    Configuring libelf
[EXTRA]    Building libelf
[EXTRA]    Installing libelf
[ERROR]    make[2]: *** [installdirs] Error 1
[ERROR]    make[1]: *** [install-recursive] Error 1
[ERROR]
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Installing libelf for host'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@259]
[ERROR]  >>        called from:
do_libelf_backend[scripts/build/companion_libs/200-libelf.sh@138]
[ERROR]  >>        called from:
do_libelf_for_host[scripts/build/companion_libs/200-libelf.sh@60]
[ERROR]  >>        called from:
do_companion_libs_for_host[scripts/build/companion_libs.sh@36]
[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@646]
[ERROR]  >>
[ERROR]  >>  For more info on this error, look at the file: 'build.log'
[ERROR]  >>  There is a list of known issues, some with workarounds, in:
[ERROR]  >>      '/usr/local/share/doc/crosstool-ng//B - Known issues.txt'
[ERROR]
[ERROR]  (elapsed: 185:57.73)
[18:50] / /usr/local/bin/ct-ng:152: recipe for target 'build' failed
make[1]: *** [build] Error 2
/usr/local/lib//steps.mk:67: recipe for target 'companion_libs_for_host+' failed
make: *** [companion_libs_for_host+] Error 2



Following is the relevant part of build.log:

[EXTRA]    Installing libelf
[DEBUG]    ==> Executing: '/usr/bin/make' 'instroot=/' 'install'
[ALL  ]    make[1]: Entering directory
'/usr/src/cross/.build/i686-unknown-linux-gnu/build/build-libelf-host-x86_64-build_unknown-cygwin'
[ALL  ]    making install in lib
[ALL  ]    make[2]: Entering directory
'/usr/src/cross/.build/i686-unknown-linux-gnu/build/build-libelf-host-x86_64-build_unknown-cygwin/lib'
[ALL  ]    dirs="/usr/src/cross/.build/i686-unknown-linux-gnu/buildtools/lib
/usr/src/cross/.build/i686-unknown-linux-gnu/buildtools/include
/usr/src/cross/.build/i686-unknown-linux-gnu/buildtools/include/libelf";
for dir in $dirs; do     /bin/sh
/usr/src/cross/.build/src/libelf-0.8.13/mkinstalldirs /$dir; done
[ALL  ]    mkdir //usr
[ALL  ]    mkdir: cannot create directory '//usr': Read-only file system
[ALL  ]    mkdir //usr/src
[ALL  ]    mkdir: cannot create directory '//usr/src': No such file or directory
[ALL  ]    mkdir //usr/src/cross
[ALL  ]    mkdir: cannot create directory '//usr/src/cross': No such
file or directory
[ALL  ]    mkdir //usr/src/cross/.build
[ALL  ]    mkdir: cannot create directory '//usr/src/cross/.build': No
such file or directory
[ALL  ]    mkdir //usr/src/cross/.build/i686-unknown-linux-gnu
[ALL  ]    mkdir: cannot create directory
'//usr/src/cross/.build/i686-unknown-linux-gnu': No such file or
directory
[ALL  ]    mkdir //usr/src/cross/.build/i686-unknown-linux-gnu/buildtools
[ALL  ]    mkdir: cannot create directory
'//usr/src/cross/.build/i686-unknown-linux-gnu/buildtools': No such
file or directory
[ALL  ]    mkdir //usr/src/cross/.build/i686-unknown-linux-gnu/buildtools/lib
[ALL  ]    mkdir: cannot create directory
'//usr/src/cross/.build/i686-unknown-linux-gnu/buildtools/lib': No
such file or directory

I'm in the directory /usr/src/cross when I execute the ct-ng build
command. I don't know why there is a message about the file system
being read-only, but that seems to be the root of the problem. Thanks
for any help.

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