support for shared libraries. Diffs from Manuel Bouyer, probably
derived from similar OpenBSD gcc diffs.
This change is in the source tree because it was used to build a NetBSD/pmax
shared-lib snapshot. The change isn't being integrated into the gcc2netbsd
script until the shared-lib diffs are finalized.
The NetbSD libc header files use GCC attributes to emit link-time warning
messages (e.g,. for gets()). SO, add a definition of the GCC back-end
macro ASM_OUTPUT_SECTION_NAME() to the mips back-end target-specific file.
This adds support for emitting warning attributes to binutils 2.6 or newer.
(Weak references may or may not work also).
This patch has been submitted to the FSF but hasn't made it into 2.7.2.1,
and seems to have got buried somewhere inside Cygnus.
Tue Feb 13 17:59:03 1996 Lee Iverson <leei@Canada.AI.SRI.COM>
* gcc.c (DEFAULT_SWITCH_TAKES_ARG): New macro, from SWITCH_TAKES_ARG.
(SWITCH_TAKES_ARG): Use it.
This change alows us to add support for the 'R' option in a way that
will minimize differences when it comes to merging a future FSF gcc
release into the NetBSD sources.
for kernel printf functions
- understand the db_printf %n,%r,%z format specifiers
- understand the kernel printf %: format specifier
- Be more permissive to %b arguments: accept any integer type, not only
unsigned ints.
long comparisons. As of this date, this change hasn't made it into
the development sources. We must consider this when it comes time
to integrate a newer gcc release.
Thu Mar 7 01:16:23 1996 J"orn Rennecke (amylaar@meolyon.hanse.de)
* expmed.c (negate_rtx): Don't negate LONG_MIN if mode is wider
than HOST_WIDE_INT.
gcc now produces worse code for this test case than gcc 2.5.8 when
invoked with -O , but it will optimize as good as gcc 2.5.8 (i.e. all
comparisons vanish) when invoked with -O2 , thus I think it doesn't
matter. If anyone is interested in looking into this, the code in
expr.c, function expand_expr, case MINUS_EXPR, if-clause for if
(TREE_UNSIGNED (type) || TREE_OVERFLOW (negated)), will refuse to
convert the subtraction into an addition if there is an overflow in
the conversion or negation of the constant. If both host and target
machine are binary computers with 2-complement representation, the
overflow should not matter.
