http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50342
Bug #: 50342
Summary: gcc/configure fails on Mac OS X Lion/Xcode 4.1 if
building Ada
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: si...@pushface.org
Created attachment 25234
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25234
May help to demonstrate failure mode
When building with --enable-languages=c,ada you have to use an Ada-capable
compiler, so you can't use Apple's. I used GCC 4.6.0.
This fails in gcc/configure; eg, from config.log,
configure:5860: checking size of long long
configure:5865: gcc -o conftest -g -fkeep-inline-functions conftest.c >&5
Undefined symbols for architecture x86_64:
"___builtin___stpncpy_chk", referenced from:
___inline_stpncpy_chk in ccgrb5E9.o
ld: symbol(s) not found for architecture x86_64
because Apple's gcc (4.2.1) has the builtin and GCC 4.6.0 doesn't.
I found that if I remove the -fkeep-inline-functions the configure succeeds
(make check-ada, check-fortran, check-c++ were OK, I chopped check-c because it
was swapping unacceptably).
I expect that if I could figure a way of passing -D_FORTIFY_SOURCE=0 to the gcc
call at configure:5865 (presumably to other gcc calls as well; I know the
'checking size of' ones all fail but not so immediately fatally, you just get
size of long = 0).
<string.h> says
#if defined (__GNUC__) && _FORTIFY_SOURCE > 0 && !defined (__cplusplus)
/* Security checking functions. */
#include <secure/_string.h>
#endif
<_types.h> says
#ifndef _FORTIFY_SOURCE
# if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&
((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__-0) < 1050)
# define _FORTIFY_SOURCE 0
# else
# define _FORTIFY_SOURCE 2 /* on by default */
# endif
#endif
The attached code fails as above if compiled with FSF GCC and
-fkeep-inline-functions unless you say -D_FORTIFY_SOURCE=0 .
