BZ#10375: Configure magic to use -U_FORTIFY_SOURCE if needed.
This commit is contained in:
Roland McGrath
parent
90c885c87b
commit
61653dfb81
11
ChangeLog
11
ChangeLog
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@ -1,3 +1,14 @@
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2012-05-16 Roland McGrath <roland@hack.frob.com>
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[BZ #10375]
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* configure.in: Check for _FORTIFY_SOURCE being predefined.
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(CPPUNDEFS): New substituted variable; add -U_FORTIFY_SOURCE if needed.
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* configure: Regenerated.
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* config.make.in (CPPUNDEFS): New substituted variable.
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* Makeconfig (CPPFLAGS): Put $(CPPUNDEFS) at the beginning.
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* Makerules ($(stdio_lim:h=st)): Use $(CPPUNDEFS).
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* time/ctime.c: Don't #undef __OPTIMIZE__ and ctime.
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2012-05-16 H.J. Lu <hongjiu.lu@intel.com>
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* sysdeps/unix/sysv/linux/bits/mqueue.h: Include <bits/types.h>.
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@ -661,7 +661,8 @@ libio-include = -I$(..)libio
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# Note that we can't use -std=* in CPPFLAGS, because it overrides
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# the implicit -lang-asm and breaks cpp behavior for .S files--notably
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# it causes cpp to stop predefining __ASSEMBLER__.
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CPPFLAGS = $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
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CPPFLAGS = $(CPPUNDEFS) $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) \
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$(+includes) $(defines) \
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-include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
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$(CPPFLAGS-$(suffix $@)) \
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$(foreach lib,$(libof-$(basename $(@F))) \
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@ -1233,7 +1233,7 @@ $(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
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echo '#define _LIBC 1'; \
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echo '#include "$(..)misc/sys/uio.h"'; } | \
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$(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)' \
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$(+includes) -xc - -o $(@:st=hT)
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$(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT)
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sed $(sed-remove-objpfx) $(sed-remove-dotdot) \
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$(@:st=dT) > $(@:st=dt)
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mv -f $(@:st=dt) $(@:st=d)
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@ -104,6 +104,7 @@ CXX = @CXX@
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BUILD_CC = @BUILD_CC@
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CFLAGS = @CFLAGS@
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CPPFLAGS-config = @CPPFLAGS@
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CPPUNDEFS = @CPPUNDEFS@
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ASFLAGS-config = @ASFLAGS_config@
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AR = @AR@
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MAKEINFO = @MAKEINFO@
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@ -632,6 +632,7 @@ libc_cv_localedir
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libc_cv_slibdir
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old_glibc_headers
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libc_cv_gcc_unwind_find_fde
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CPPUNDEFS
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sizeof_long_double
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EGREP
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GREP
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@ -7542,6 +7543,40 @@ _ACEOF
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sizeof_long_double=$ac_cv_sizeof_long_double
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CPPUNDEFS=
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FORTIFY_SOURCE predefine" >&5
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$as_echo_n "checking for _FORTIFY_SOURCE predefine... " >&6; }
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if ${libc_cv_predef_fortify_source+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int
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main ()
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{
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#ifdef _FORTIFY_SOURCE
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# error bogon
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#endif
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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libc_cv_predef_fortify_source=no
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else
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libc_cv_predef_fortify_source=yes
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_predef_fortify_source" >&5
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$as_echo "$libc_cv_predef_fortify_source" >&6; }
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if test $libc_cv_predef_fortify_source = yes; then
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CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
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fi
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### End of automated tests.
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### Now run sysdeps configure fragments.
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16
configure.in
16
configure.in
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@ -2036,6 +2036,22 @@ AC_CHECK_SIZEOF(long double, 0)
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sizeof_long_double=$ac_cv_sizeof_long_double
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AC_SUBST(sizeof_long_double)
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CPPUNDEFS=
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dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
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dnl Since we are building the implementations of the fortified functions here,
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dnl having the macro defined interacts very badly.
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AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
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[AC_TRY_COMPILE([], [
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#ifdef _FORTIFY_SOURCE
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# error bogon
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#endif],
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[libc_cv_predef_fortify_source=no],
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[libc_cv_predef_fortify_source=yes])])
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if test $libc_cv_predef_fortify_source = yes; then
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CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
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fi
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AC_SUBST(CPPUNDEFS)
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### End of automated tests.
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### Now run sysdeps configure fragments.
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@ -1,4 +1,4 @@
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/* Copyright (C) 1991, 1996 Free Software Foundation, Inc.
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/* Copyright (C) 1991-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -15,12 +15,8 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#undef __OPTIMIZE__ /* Avoid inline `ctime' function. */
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#include <time.h>
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#undef ctime
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/* Return a string as returned by asctime which
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is the representation of *T in that form. */
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char *
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