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solve the ugly warnings, be more consistent, allow __attribute__ to depend 

on compiler option features, etc.
This commit is contained in:
tg 2007-06-21 16:11:37 +00:00
parent d42f966d22
commit 4fef868b6d
1 changed files with 44 additions and 34 deletions
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78
Build.sh
View File

@ -1,5 +1,5 @@
#!/bin/sh
# $MirOS: src/bin/mksh/Build.sh,v 1.215 2007/06/21 15:53:14 tg Exp $
# $MirOS: src/bin/mksh/Build.sh,v 1.216 2007/06/21 16:11:37 tg Exp $
#-
# Environment used: CC CFLAGS CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
# CPPFLAGS recognised: MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NEED_MKNOD MKSH_NOPWNAM
@ -329,7 +329,7 @@ case $TARGET_OS in
HP-UX)
case $ct:`uname -m` in
gcc:ia64) : ${CFLAGS='-O2 -mlp64'} ;;
hpcc:ia64) : ${CFLAGS='-O2 +DD64'} ;;
hpcc:ia64) : ${CFLAGS='+O2 +DD64'} ;;
esac
;;
esac
@ -337,6 +337,7 @@ esac
#
# Compiler: works as-is, with -Wno-error and -Werror
#
orig_CFLAGS=$CFLAGS
save_NOWARN=$NOWARN
NOWARN=
ac_flags 0 compiler_works '' 'if the compiler works'
@ -366,45 +367,16 @@ else
ac_flags 0 werror "-Werror"
fi
# The following tests are run with -Werror if possible
test $ct != sunpro && test 1 = $HAVE_CAN_WERROR && NOWARN=-Werror
test $ct = sunpro && test 1 = $HAVE_CAN_ERRWARNALL && NOWARN='-errwarn=%all'
#
# Compiler: check for stuff that only generates warnings
#
ac_test attribute '' 'if we have __attribute__((...)) at all' <<-'EOF'
#include <stdlib.h>
#undef __attribute__
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>
#undef __attribute__
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[--ac], 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
# End of tests run with -Werror
test $ct = hpcc && NOWARN=+We
DOWARN=$NOWARN
NOWARN=$save_NOWARN
#
# Compiler: extra flags (-O2 -f* -W* etc.)
#
i=`echo :"$CFLAGS" | sed 's/^://' | tr -c -d $alll$allu$alln-`
i=`echo :"$orig_CFLAGS" | sed 's/^://' | tr -c -d $alll$allu$alln-`
if test $ct = sunpro; then
if test x"$i" = x""; then
cat >x <<-'EOF'
@ -416,6 +388,10 @@ if test $ct = sunpro; then
yes pad | head -n 256 >>x
ac_flags - 1 otwo "-xO2" <x
fi
elif test $ct = hpcc; then
test x"$i" = x"" && ac_flags 1 otwo "+O2"
ac_flags 1 agcc "-Agcc"
ac_flags 1 ac99 "-AC99"
else
test x"$i" = x"" && ac_flags 1 otwo "-O2"
fi
@ -448,6 +424,40 @@ ac_test expstmt '' "if the compiler supports statements as expressions" <<-'EOF'
int main(int ac, char *av[]) { return (ksh_isspace(ac + **av)); }
EOF
# The following tests are run with -Werror if possible
NOWARN=$DOWARN
#
# Compiler: check for stuff that only generates warnings
#
ac_test attribute '' 'if we have __attribute__((...)) at all' <<-'EOF'
#include <stdlib.h>
#undef __attribute__
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>
#undef __attribute__
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[--ac], 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
# End of tests run with -Werror
NOWARN=$save_NOWARN
#
# mksh: flavours (full/small mksh, omit certain stuff)
#