Files with optimisation issues

In Scilab, some fortran files have problem if they are compiled with optimisation flags on some computer.

List in Scilab 4

• routines/interf/intmgetl.f some versions of g77 on sparc will compile intmgetl.f but the code does not execute properly.

• routines/control/hqror2.f routines/control/comqr3.f routines/control/tql2.f routines/control/imtql3.f routines/control/dsvdc.f routines/control/wsvdc.f routines/control/pade.f According to compiler, do not optimize the following files

• routines/calelm/icopy.f routines/calelm/unsfdcopy.f according to compiler, do not optimize the following files

• routines/lapack/dlamch.f

List in Scilab 5

• IO : modules/io/sci_gateway/fortran/intmgetl.f some versions of g77 on sparc will compile intmgetl.f but the code does not execute properly.

• Elementaries Functions : In modules/elementaries_functions/src/fortran/, qror2.f comqr3.f pade.f unsfdcopy.c icopy.f According to compiler, do not optimize the following files (tql2.f imtql3.f dsvdc.f wsvdc.f have been removed). dbesjg.f has some problems with -O0 on linux 64 bits.

• Lapack : libs/lapack/dlamch.f

• data_structures : src/fortran/intl_e.f (bug 1604)

Solution

Using the autotools, the mechanism is to create a "temporary" library for the file(s) which causes the problem.

# Define a "fake" temporary library
noinst_LTLIBRARIES = libdummy-lapack.la
# List of the files which should be be optimised
libdummy_lapack_la_SOURCES = dlamch.f slamch.f
# The trick which will remove the optimisation
libdummy_lapack_la_FFLAGS = `echo "@FFLAGS@"| sed -e 's|-O[0-9+]|-O0|'`
# Include the fake library into the real one
liblapack_la_LIBADD = libdummy-lapack.la
# Override the compilation rules
libdummy_lapack_la-dlamch.lo: dlamch.f
        $(LIBTOOL) --tag=F77 --mode=compile $(F77) $(libdummy_lapack_la_FFLAGS) -c -o libdummy_lapack_la-dlamch.lo `test -f 'dlamch.f' || echo '$(srcdir)/'`dlamch.f
libdummy_lapack_la-slamch.lo: slamch.f
        $(LIBTOOL) --tag=F77 --mode=compile $(F77) $(libdummy_lapack_la_FFLAGS) -c -o libdummy_lapack_la-slamch.lo `test -f 'slamch.f' || echo '$(srcdir)/'`slamch.f