misc sparse patches

Hi Chris,

I have collected quite a few sparse patches, some of which are very old (e.g. patch #1 is from 2009), so it's about time I at least tried to get them upstream! This represents the subset of patches which I think are useful/ready (the MinGW patches are still on the back-burner!). ;-)

Some short notes on the patches:

01. Add the __restrict__ keyword
02. sparse: add 'gnu_inline' to the ignored attributes

These patches fix up features that are used in system header files, on certain platforms, which usually renders sparse completely useless if you #include such a system header.

03. don't call isdigit/tolower with a char argument
04. compile-i386.c: don't mix calls to write(2) with stdio

These fix up some compiler warnings. See patch #4 for some further notes.

05. Makefile: suppress error message from shell
06. don't run sparse{c,i} tests when sparse-llvm is disabled

If you don't have LLVM installed, the test suite spews many test failures for programs that haven't been built, which obscures test failures for sparse itself. These patches provide a means to silence the useless test failures.

07. Add support for multiarch system header files
08. cgcc: use only the cc command to determine $gcc_base_dir
09. cgcc: use $ccom to set $multiarch_dir if not specified

A couple of years ago, after upgrading my Linux installation, I found that gcc was now using 'multiarch' directories for various files. This caused a problem, in particular, with the system include files. For example, this meant that I had to add '-isystem /usr/include/i386-linux-gnu' to SPARSE_FLAGS in my config.mak file in git.git to make things work again. These patches provide support for 'multiarch' systems in sparse directly, which actually fixes some (4) tests which include some system headers.

10. cgcc: add a configuration file for cgcc

Unlike the previous patches, this one is brand new and marked as RFC. When I added patch #9 I noticed a marked slowdown on cygwin. A few days ago, I finally decided to have a look at this to see if I could improve the performance on cygwin. This patch not only clawed back the time lost by patch #9, but it improved the performance even further (by about 20%).

ATB,
Ramsay Jones

Ramsay Jones (10):
Add the __restrict__ keyword
sparse: add 'gnu_inline' to the ignored attributes don't call isdigit/tolower with a char argument compile-i386.c: don't mix calls to write(2) with stdio
Makefile: suppress error message from shell don't run sparse{c,i} tests when sparse-llvm is disabled Add support for multiarch system header files
cgcc: use only the cc command to determine $gcc_base_dir
cgcc: use $ccom to set $multiarch_dir if not specified
cgcc: add a configuration file for cgcc

 Makefile                 | 19 ++++++++++---------
 cgcc                     | 23 +++++++++++++++++++++--
 compile-i386.c           |  7 ++-----
 expression.c             |  2 +-
 ident-list.h             |  2 +-
 lib.c                    | 22 +++++++++++++++++++---
 parse.c                  |  5 ++++-
 sparse.1                 |  6 ++++++
 validation/attr-inline.c | 21 +++++++++++++++++++++
 validation/reserved.c    |  1 +
 validation/test-suite    | 25 +++++++++++++++++++++++--
 11 files changed, 109 insertions(+), 24 deletions(-)
 create mode 100644 validation/attr-inline.c

2.0.0