[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 Jerry DeLisle changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #6 from Jerry DeLisle --- (In reply to Steve Kargl from comment #5) > On Wed, Sep 21, 2016 at 04:25:00PM +, jvdelisle at gcc dot gnu.org wrote: > > > > I will try to study the script some more later today. Changing status to > > unconfirmed while we look into this a bit. > > > > I closed this bug a long time ago, because the initial report > indicated that OP was not using GCC sources. OP is using > something supplied by Google for Android. This is not a > gfortran problem. Yes Steve understood. Will take this off line. I am more curious than anything else. I have an Android tablet that I am fiddling with.
[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 Jerry DeLisle changed: What|Removed |Added Status|RESOLVED|UNCONFIRMED Resolution|INVALID |--- --- Comment #4 from Jerry DeLisle --- (In reply to Paul Mustiere from comment #3) ---snip--- > > The issue being that long double = double in this case. > > When kind=16 match in C is defined, there's the check: > 16) if [ $long_double_kind -eq 10 ]; then > > Could it be that kind=16 should be match to __float128, > and the check should be $long_double_kind -neq 16? kind=16 is float128. So something wrong if long double = double I will try to study the script some more later today. Changing status to unconfirmed while we look into this a bit.
[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 --- Comment #5 from Steve Kargl --- On Wed, Sep 21, 2016 at 04:25:00PM +, jvdelisle at gcc dot gnu.org wrote: > > I will try to study the script some more later today. Changing status to > unconfirmed while we look into this a bit. > I closed this bug a long time ago, because the initial report indicated that OP was not using GCC sources. OP is using something supplied by Google for Android. This is not a gfortran problem.
[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 --- Comment #3 from Paul Mustiere --- In the script: possible_real_kinds="4 8 10 16" i.e. it tries them all In the for loop, when it tries to compile the dummy Fortran program to check each kind=k existance, only 4, 8 & 16 exists. kind=4 is defined as float, kind=8 is defined as double, kind=16 is defined as long double. The issue being that long double = double in this case. When kind=16 match in C is defined, there's the check: 16) if [ $long_double_kind -eq 10 ]; then Could it be that kind=16 should be match to __float128, and the check should be $long_double_kind -neq 16?
[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 Jerry DeLisle changed: What|Removed |Added CC||jvdelisle at gcc dot gnu.org --- Comment #2 from Jerry DeLisle --- (In reply to Paul Mustiere from comment #0) > Hello, > > I am building the GNU toolchain for Android with support for Fortran, and > encountered an issue when targeting x86 for the runtime library. > > Note: I'm using the toolchain sources provided by Google, but as far as I > can tell the Fortran part is simply 4.9 since they are not trying to build > with Fortran. > > In intrisics/cshift0.c, I get a 'duplicate case value' > (http://paste.ubuntu.com/16861425/). As far as I can tell: > > - GFC_DTYPE_REAL_16 is defined (but not GFC_DTYPE_REAL_10), hence > GFC_REAL_16 is defined as long double. > - sizeof(long double) = sizeof(double) = 8, which causes the duplicate case. > > I find a workaround which consists of detecting both sizes in mk-kinds-h.sh > and checking that they are not equal before defining GFC_REAL_16. The rest > of the toolchain compiles fine, but I am not sure it's ideal. > Also, I'm curious as to why Fortran seems to be fine with real (kind=16) but > C doesn't seem to be able to hold variables that big. > > I know I'm not using the regular GNU toolchain but any help is appreciated. > > Cheers, > Paul Mustiere Paul, Look for where "for k in $possible_real_kinds" is in the mk-kinds script. Where is $possible_real_kinds set?
[Bug libfortran/71363] Issue when sizeof(double) = sizeof(long double)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71363 kargl at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED CC||kargl at gcc dot gnu.org Resolution|--- |INVALID --- Comment #1 from kargl at gcc dot gnu.org --- (In reply to Paul Mustiere from comment #0) > Hello, > > I am building the GNU toolchain for Android with support for Fortran, and > encountered an issue when targeting x86 for the runtime library. > > Note: I'm using the toolchain sources provided by Google, but as far as I > can tell the Fortran part is simply 4.9 since they are not trying to build > with Fortran. > > In intrisics/cshift0.c, I get a 'duplicate case value' > (http://paste.ubuntu.com/16861425/). As far as I can tell: > > - GFC_DTYPE_REAL_16 is defined (but not GFC_DTYPE_REAL_10), hence > GFC_REAL_16 is defined as long double. > - sizeof(long double) = sizeof(double) = 8, which causes the duplicate case. > > I find a workaround which consists of detecting both sizes in mk-kinds-h.sh > and checking that they are not equal before defining GFC_REAL_16. The rest > of the toolchain compiles fine, but I am not sure it's ideal. > Also, I'm curious as to why Fortran seems to be fine with real (kind=16) but > C doesn't seem to be able to hold variables that big. > > I know I'm not using the regular GNU toolchain but any help is appreciated. > > Cheers, > Paul Mustiere Unless you can reproduce the problem with sources from head (aka 7.0), the 6-branch, or 5-branch, I afraid you are on your own. If you can reproduce the problem with "official" source feel free to re-open the bug report.
