#7818: Update sage-env
------------------------+---------------------------------------------------
Reporter: drkirkby | Owner: drkirkby
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: porting | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
------------------------+---------------------------------------------------
This is an update to the sage-env file. It should allow a much improved
build process, simplifying the code in spkg install files, as much of it
will be taken care of. The code will also be more portable.
* Little or no need for any SAGE64 rubbish in any spkg-install files. The
appropriate flag to build 64-bit code is added if SAGE64 is set to use.
* No need to add -Wall or -g, as these are added by default.
* GNU specific compiler options can be replaced by variables with similar
names to the GNU ones, making substitution a relatively easy task.
* Will enable code to be much more portable.
The changes mainly affect the 3 variables for compiler flags - CFLAGS,
CXXFLAGS and FCFLAGS.
The user may set CFLAGS, CXXFLAGS and FCFLAGS, but the following will be
appended.
== General flags ==
* The -g option is added to enable debugging unless SAGE_DEBUG is set to
"no".
* -Wall is added for gcc, g++ and gfortran.
== 64-bit Flags ==
If SAGE64 is "yes"
* -m64 is added for GCC
* -m64 is added for Sun Studio
* -q64 is added for IBM's compiler on AIX
* +DA2.OW is added on HP-UX. (This will not work on Itanium processors
running on HP-UX. I'll update when I have more information).
A variable CFLAG64 is set to the correct option for building 64-bit
binaries with the C compiler. So if -m64 is replaced by $CFLAG64, the code
will work on any C compiler.
(Some compilers may require a different option for C and C++ files. The
names CXXFLAG64 and FCFLAG64 are reserved for this, but its not suggested
they are used now)
== C++ library flags ==
Due to changes in the C++ standard, it is impossible for compiler vendors
to distribute a C++ runtime library which is both compatible with the old
standard and the new one. Both HP and Sun use the older library by
default, and need a switch added to enable the newer libraries, which more
closely follow the latest C++ standard. See:
http://developers.sun.com/solaris/articles/cmp_stlport_libCstd.html
http://docs.hp.com/en/14487/faq.htm
Therefore
* If the compiler is Sun Studio, library=stlport4 is added to CXXFLAGS.
* If the Compiler is HP's on HP-UX, the option -AA is added to CXXFLAGS.
== Shared Library Flags ==
Five new variables are set in sage-env. These are for building shared
libraries and take on names very similar to the GNU names for the flags.
||'''Flag name'''||'''Value with GCC'''||'''Value with Sun Studio'''||
||FPIC_FLAG||-fPIC||-xcode=pic32||
||SHARED_FLAG||-shared||-G||
||SONAME_FLAG||-soname||-h||
A reviewer may notice two further variable names used. These options can
be linker dependent and will be finalized once some code to detect the
linker is in place.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7818>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
