gfortran segfaults on "Hello world"

gfortran segfaults on "Hello world"

[Thomas Koenig]

Hi,

gfortran appears to be broken (segfault) with the newest cygwin
version I just downloaded. It segfaults on a "Hello, world" program.
gcc works fine.

The warnings on the GMP and MPFR headers make me suspect that some
dependency may be broken.

Here's what happens:

$ gfortran.exe hello.f
<built-in>: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

$ which gfortran
/usr/bin/gfortran

$ ldd /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/f951.exe
         ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll 
(0x7ff96d540000)
         KERNEL32.DLL => /cygdrive/c/Windows/system32/KERNEL32.DLL 
(0x7ff96b8d0000)
         KERNELBASE.dll => /cygdrive/c/Windows/system32/KERNELBASE.dll 
(0x7ff96a760000)
         cygcloog-isl-4.dll => /usr/bin/cygcloog-isl-4.dll (0x3fc700000)
         cygwin1.dll => /usr/bin/cygwin1.dll (0x180040000)
         cyggmp-10.dll => /usr/bin/cyggmp-10.dll (0x3fb610000)
         cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3fa2f0000)
         cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3f69d0000)
         cygisl-10.dll => /usr/bin/cygisl-10.dll (0x3f68e0000)
         cygmpc-3.dll => /usr/bin/cygmpc-3.dll (0x3f63f0000)
         cygmpfr-4.dll => /usr/bin/cygmpfr-4.dll (0x3f6390000)
         cygz.dll => /usr/bin/cygz.dll (0x3f4930000)
         cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fbc50000)

$ gfortran -v hello.f
Driving: gfortran -v hello.f -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with: 
/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3/configure 
--srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3 
--prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc 
--docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C 
--build=x86_64-pc-cygwin --host=x86_64-pc-cygwin 
--target=x86_64-pc-cygwin --without-libiconv-prefix 
--without-libintl-prefix --libexecdir=/usr/lib --enable-shared 
--enable-shared-libgcc --enable-static 
--enable-version-specific-runtime-libs --enable-bootstrap 
--enable-__cxa_atexit --with-dwarf2 --with-tune=generic 
--enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite 
--enable-threads=posix --enable-libatomic --enable-libgomp 
--disable-libitm --enable-libquadmath --enable-libquadmath-support 
--enable-libssp --enable-libada --enable-libgcj-sublibs 
--disable-java-awt --disable-symvers 
--with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as 
--with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix 
--without-libintl-prefix --with-system-zlib --enable-linker-build-id
Thread model: posix
gcc version 4.9.3 (GCC)
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
  /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/f951.exe hello.f -ffixed-form 
-quiet -dumpbase hello.f -mtune=generic -march=x86-64 -auxbase hello 
-version -fintrinsic-modules-path 
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/finclude -o /tmp/ccsadurw.s
GNU Fortran (GCC) version 4.9.3 (x86_64-pc-cygwin)
         compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR 
version 3.1.2-p11, MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran (GCC) version 4.9.3 (x86_64-pc-cygwin)
         compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR 
version 3.1.2-p11, MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
<built-in>: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Any ideas?

Regards

     Thomas

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Re: gfortran segfaults on "Hello world"

[Tim Prince]

On 11/18/2015 5:26 PM, Thomas Koenig wrote:
> Hi,
>
> gfortran appears to be broken (segfault) with the newest cygwin
> version I just downloaded. It segfaults on a "Hello, world" program.
> gcc works fine.
>
> The warnings on the GMP and MPFR headers make me suspect that some
> dependency may be broken.
>
> Here's what happens:
>
> $ gfortran.exe hello.f
> <built-in>: internal compiler error: Segmentation fault
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
>
> $ which gfortran
> /usr/bin/gfortran
>
> $ ldd /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/f951.exe
>          ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll
> (0x7ff96d540000)
>          KERNEL32.DLL => /cygdrive/c/Windows/system32/KERNEL32.DLL
> (0x7ff96b8d0000)
>          KERNELBASE.dll => /cygdrive/c/Windows/system32/KERNELBASE.dll
> (0x7ff96a760000)
>          cygcloog-isl-4.dll => /usr/bin/cygcloog-isl-4.dll (0x3fc700000)
>          cygwin1.dll => /usr/bin/cygwin1.dll (0x180040000)
>          cyggmp-10.dll => /usr/bin/cyggmp-10.dll (0x3fb610000)
>          cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3fa2f0000)
>          cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3f69d0000)
>          cygisl-10.dll => /usr/bin/cygisl-10.dll (0x3f68e0000)
>          cygmpc-3.dll => /usr/bin/cygmpc-3.dll (0x3f63f0000)
>          cygmpfr-4.dll => /usr/bin/cygmpfr-4.dll (0x3f6390000)
>          cygz.dll => /usr/bin/cygz.dll (0x3f4930000)
>          cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3fbc50000)
>
> $ gfortran -v hello.f
> Driving: gfortran -v hello.f -l gfortran -shared-libgcc
> Using built-in specs.
> COLLECT_GCC=gfortran
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/lto-wrapper.exe
> Target: x86_64-pc-cygwin
> Configured with:
> /cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3/configure
> --srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3
> --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc
> --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C
> --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin
> --target=x86_64-pc-cygwin --without-libiconv-prefix
> --without-libintl-prefix --libexecdir=/usr/lib --enable-shared
> --enable-shared-libgcc --enable-static
> --enable-version-specific-runtime-libs --enable-bootstrap
> --enable-__cxa_atexit --with-dwarf2 --with-tune=generic
> --enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite
> --enable-threads=posix --enable-libatomic --enable-libgomp
> --disable-libitm --enable-libquadmath --enable-libquadmath-support
> --enable-libssp --enable-libada --enable-libgcj-sublibs
> --disable-java-awt --disable-symvers
> --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as
> --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix
> --without-libintl-prefix --with-system-zlib --enable-linker-build-id
> Thread model: posix
> gcc version 4.9.3 (GCC)
> COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
>   /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/f951.exe hello.f -ffixed-form
> -quiet -dumpbase hello.f -mtune=generic -march=x86-64 -auxbase hello
> -version -fintrinsic-modules-path
> /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/finclude -o /tmp/ccsadurw.s
> GNU Fortran (GCC) version 4.9.3 (x86_64-pc-cygwin)
>          compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR
> version 3.1.2-p11, MPC version 1.0.3
> warning: GMP header version 6.0.0 differs from library version 6.1.0.
> warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> GNU Fortran (GCC) version 4.9.3 (x86_64-pc-cygwin)
>          compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR
> version 3.1.2-p11, MPC version 1.0.3
> warning: GMP header version 6.0.0 differs from library version 6.1.0.
> warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> <built-in>: internal compiler error: Segmentation fault
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
>
> Any ideas?
>
upgrade gmp and mpfr to current versions.  I prefer the gfortran 5.2 
binary, or a 6.0 bootstrapped from 5.2, all using those current cygwin 
gmp and mpfr releases.
-- 
Tim Prince

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Re: gfortran segfaults on "Hello world"

[Thomas Koenig]

Hi,

> Cygwin64 now offers a choice among 4.9.2-3, 4.9.3-1, and 5.2.0-1.  I
> have the last one installed, and in addition a recently built 6.0 on my
> Haswell laptop.  I’m fairly certain I have used the 4.9.3 successfully
> in the past.  It looks like you need to update to the current gmp and
> mpfr.  Normally, cygwin install.exe would tell you to do that if you
> install a gcc and gfortran built against those.

I just installed 5.2.0, and got the same warning about mismatched
libraries and the same segfault.

> If you really wanted 4.9.3-1 running against the older gmp and mpfr, you
> could build it yourself.

The library versions are *newer* than what both 4.9.3 and 5.2.0 from the
distribution are built against.  This may or may not be the cause of the
problem; either way gfortran is currently broken on Cygwin 64.

If your sytem is running fine, don't upgrade :-)

Building gfortran myself under Cygwin has not been a happy experience
for me in the past (although I do it quite regularly on Linux, of
course).  Maybe I'll give it a spin.

Regards

	Thomas



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Re: gfortran segfaults on "Hello world"

[Achim Gratz]

Thomas Koenig writes:
> The warnings on the GMP and MPFR headers make me suspect that some
> dependency may be broken.

No, they simply have been updated after gcc was built.

> warning: GMP header version 6.0.0 differs from library version 6.1.0.

Can you downgrade to libgmp10-6.0.0a-2 and check if that solves the
problem for you?  There has been no API bump and the libraries are
supposed to be binary compatible, but maybe gcc is doing something funky
with some internals.

> warning: MPFR header version 3.1.2-p11 differs from library version
> 3.1.3.

The current version really is just rolling up the patches of the former
and an official rename and it's been in place for long enough to be an
unlikely candidate for breakage.


Regards,
Achim.
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Re: gfortran segfaults on "Hello world"

[Marco Atzeri]

On 19/11/2015 08:05, Thomas Koenig wrote:
> Hi,
>
>> Cygwin64 now offers a choice among 4.9.2-3, 4.9.3-1, and 5.2.0-1.  I
>> have the last one installed, and in addition a recently built 6.0 on my
>> Haswell laptop.  I’m fairly certain I have used the 4.9.3 successfully
>> in the past.  It looks like you need to update to the current gmp and
>> mpfr.  Normally, cygwin install.exe would tell you to do that if you
>> install a gcc and gfortran built against those.
>
> I just installed 5.2.0, and got the same warning about mismatched
> libraries and the same segfault.
>
>> If you really wanted 4.9.3-1 running against the older gmp and mpfr, you
>> could build it yourself.
>
> The library versions are *newer* than what both 4.9.3 and 5.2.0 from the
> distribution are built against.  This may or may not be the cause of the
> problem; either way gfortran is currently broken on Cygwin 64.

gfortran 4.9.3-1 is working fine on my W7-64 system

$ cygcheck -cd |grep -E "fortran|gmp|mpfr"
gcc-fortran                             4.9.3-1
gmp                                     6.1.0-1
libgfortran3                            4.9.3-1
libgmp-devel                            6.1.0-1
libgmp10                                6.1.0-1
libgmpxx4                               6.1.0-1
libmpfr-devel                           3.1.3-1
libmpfr4                                3.1.3-1
mpfr                                    3.1.3-1

$ gfortran  -ffree-form helloworld.f -o helloworld-f77-gcc

$ ./helloworld-f77-gcc.exe
  Hello World!

$ cat helloworld.f
        write (*,*) "Hello World!"
end




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Re: gfortran segfaults on "Hello world"

[Achim Gratz]

Thomas Koenig writes:
[…]

Can you please post cygcheck output as per
https://cygwin.com/problems.html


Regards,
Achim.
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