https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72833
Bug ID: 72833
Summary: [7 regression] error in fortran/parse.c
(unexpected_eof) on Mac OS X 10.7
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: edlinger at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin11.4.2
Target: x86_64-apple-darwin11.4.2
Build: x86_64-apple-darwin11.4.2
Between 20160729 and 20160805, Mac OS X 10.7 bootstrap got broken:
/vol/gcc/src/hg/trunk/local/gcc/fortran/parse.c: In function 'void
unexpected_eof()':
/vol/gcc/src/hg/trunk/local/gcc/fortran/parse.c:2618:1: error: 'noreturn'
function does return [-Werror]
}
^
Unlike Solaris, Linux, and e.g. macOS 10.12, the Mac OS 10.7 <setjmp.h> (or
<i386/setjmp.h>, to be exact) doesn't declare longjmp noreturn, as can be seen
in the following example:
$ cat lj-nr.c
#include <setjmp.h>
static jmp_buf eof_buf;
void unexpected_eof (void) __attribute__((__noreturn__));
void
unexpected_eof (void)
{
longjmp (eof_buf, 1);
}
gcc 6.1 compiles it without error, while
$ ./trunk/10.7-gcc/build/prev-gcc/xgcc -B ./trunk/10.7-gcc/build/prev-gcc/ -c
~/lj-nr.c
/homes/ro/lj-nr.c: In function 'unexpected_eof':
/homes/ro/lj-nr.c:11:1: warning: 'noreturn' function does return
}
^
This is obviously caused by
2016-08-03 Bernd Edlinger <bernd.edlin...@hotmail.de>
PR middle-end/71876
* calls.c (special_function_p): Remove special handling of
"setjmp_syscall", "qsetjmp", "longjmp", "siglongjmp" and the
prefix "__x". Recognize "savectx", "vfork" and "getcontext" only
without prefix. Remove potentially unsafe ECF_LEAF and ECF_NORETURN.
Rainer
