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* Scan for __attribute__((...)) in general (the earliest was 2.5,

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where we had 'noreturn' etc. but no '__noreturn__')
* Scan for __attribute__((bounded)) and __attribute__((used))
  if we have __attribute__((noreturn))
* To be able to scan if certain attributes give warnings,
  scan for -Werror with a simple programme which hopefully triggers none
* Convert __attribute__((unused)) to __unused, noreturn -> __dead
* Unify other attributes
* Clean up typography a little more
This commit is contained in:
tg
2007-01-12 01:49:29 +00:00
parent 70eb6d19c2
commit 5891915f1b
10 changed files with 161 additions and 148 deletions
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40
Build.sh
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@ -1,15 +1,9 @@
#!/bin/sh
# $MirOS: src/bin/mksh/Build.sh,v 1.98 2007/01/12 01:44:32 tg Exp $
# $MirOS: src/bin/mksh/Build.sh,v 1.99 2007/01/12 01:49:26 tg Exp $
#-
# Environment: CC, CFLAGS, CPPFLAGS, LDFLAGS, LIBS, NOWARN, NROFF
# With -x: SRCS (extra), TARGET_OS (uname -s)
# XXX TODO: check for __attribute__ (Minix 3 ACK probably doesn't)
# and other gccisms in the code, handle appropriately. Note that I
# sometimes _want_ gccisms, because of the improved error checks.
# XXX TODO: check for $CPP -dD and if that works
v()
{
$e "$*"
@ -180,6 +174,38 @@ ac_testn can_wnoerror '' "if '$NOWARN' can be used" <<-'EOF'
EOF
test 1 = $HAVE_CAN_WNOERROR || NOWARN=
save_NOWARN=$NOWARN
NOWARN=-Werror
ac_testn can_werror '' "if -Werror can be used" <<-'EOF'
int main(void) { return (0); }
EOF
test 1 = $HAVE_CAN_WERROR || NOWARN=
ac_test attribute '' 'if we have __attribute__((...)) at all' <<-'EOF'
#include <stdlib.h>
void fnord(void) __attribute__((noreturn));
int main(void) { fnord(); }
void fnord(void) { exit(0); }
EOF
ac_test attribute_bounded attribute 0 'for __attribute__((bounded))' <<-'EOF'
#include <string.h>
int xcopy(const void *, void *, size_t)
__attribute__((bounded (buffer, 1, 3)))
__attribute__((bounded (buffer, 2, 3)));
int main(int ac, char *av[]) { return (xcopy(av[0], av[1], 1)); }
int xcopy(const void *s, void *d, size_t n) {
memmove(d, s, n); return (n);
}
EOF
ac_test attribute_used attribute 0 'for __attribute__((used))' <<-'EOF'
static const char fnord[] __attribute__((used)) = "42";
int main(void) { return (0); }
EOF
NOWARN=$save_NOWARN
ac_testn mksh_full '' "if we're building without MKSH_SMALL" <<-'EOF'
#ifdef MKSH_SMALL
#error OK, we are building an extra small mksh.