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CVS commit: pkgsrc/lang/gcc-aux

Module Name:    pkgsrc
Committed By:   marino
Date:           Sat Jul 14 21:53:06 UTC 2012

Modified Files:
        pkgsrc/lang/gcc-aux: Makefile
        pkgsrc/lang/gcc-aux/files: diff-ada diff-core diff-cxx-testsuite
            diff-fortran-testsuite diff-gcc-testsuite

Log Message:
lang/gcc-aux: Fix c/c++ precision on FreeBSD/DragonFly

Until now, GCC builders had to choose between Ada and C/C++ on the
following platforms:


On these platforms, depending on the value of the configuration macro
TARGET_96_ROUND_53_LONG_DOUBLE, either Ada precision or C/C++ long
double precision was broken.  The reason is that the floating point unit
of these platforms round off real-time calculations to 53-bit mantissas.
GCC will adjust accordingly to compensate.  Since a common backend is used
for all languages, one had to choice which language they wanted correct.

The solution is to break out the object file responsible for this from
the common backend library.  Ada now receives an altered version of
insn-modes.o, one that instructs the FPU not to round off the results.
This is all handled by patched Makefiles.

Other changes:
  - Configure DragonFly to add ".note.GNU-stack" section to assembly files
    to determine if program needs executable stacks
  - Skip 2 subtests of Wconversion-real on i386 FreeBSD and DragonFly.
    Due to the rounding behavior mentioned above, they fail to produce
    error messages as expected.  It's not possible to set target with
    xfail, and every target && target seems not work work.  So we will
    assume all gcc-aux platform targets are long-double capabile and
    just set xfail for x86 FreeBSD and DragonFly.
  - Rework Fortran large real test 2 to skip on x86_64 *BSD.  This test
    should pass on x86 machines.
  - Rework Fortran large real test 3 to be skipped when compiles with -O0
    only x86_64 machines.  All other combinations will pass.
  - Rename C format test typedef from quad_t to quad2_t.  DragonFly
    has a standard type called quad_t and the type conflict causes a
    large number of gcc tests to fail.
  - Add dummy dg-error line to avoid an assembly comparison tests on
    large files not built (test was marked as UNSUPPORTED but dejagnu is
    too dumb to know not to check for the tests' products.)
  - Reorder path passed during build when using an already-built gcc-aux
    compiler to build new compiler.  If gnat-aux is also installed, it
    would use the gnat* tools from that compiler rather than gcc-aux
    which results in build failure (different versions of tools are
    getting used together resulting in build failure).

To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 pkgsrc/lang/gcc-aux/Makefile
cvs rdiff -u -r1.1 -r1.2 pkgsrc/lang/gcc-aux/files/diff-ada \
    pkgsrc/lang/gcc-aux/files/diff-core \
    pkgsrc/lang/gcc-aux/files/diff-cxx-testsuite \
    pkgsrc/lang/gcc-aux/files/diff-fortran-testsuite \

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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