From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Bunk Subject: [PATCH] alloca.3: correct information on getting non-inlined version with gcc+glibc Date: Sun, 12 May 2013 14:26:07 +0300 Message-ID: <1368357967-8813-1-git-send-email-bunk@kernel.org> Return-path: Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-man@vger.kernel.org - remove the incorrect information that -fno-builtin would help - add -std=c11 to the list of strict options - emphasize more that both the gcc option and not including alloca.h are needed - add the #ifdef from the glibc alloca.h to make the situation clearer Signed-off-by: Adrian Bunk --- man3/alloca.3 | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/man3/alloca.3 b/man3/alloca.3 index 73b88f5..0d593ed 100644 --- a/man3/alloca.3 +++ b/man3/alloca.3 @@ -40,7 +40,7 @@ .\" Various rewrites and additions (notes on longjmp() and SIGSEGV). .\" Weaken warning against use of alloca() (as per Debian bug 461100). .\" -.TH ALLOCA 3 2008-01-24 "GNU" "Linux Programmer's Manual" +.TH ALLOCA 3 2013-05-12 "GNU" "Linux Programmer's Manual" .SH NAME alloca \- allocate memory that is automatically freed .SH SYNOPSIS @@ -110,20 +110,22 @@ This is not done when either the .IR "\-std=c89" , .IR "\-std=c99" , or the -.IR "\-fno\-builtin" +.IR "\-std=c11" option is given -(and the header +.BR and +the header .I -is not included). -But beware! -By default the glibc version of +is not included. +Otherwise (without an \-ansi or \-std=c* option) the glibc version of .I includes .I -and that contains the line: +and that contains the lines: .nf + #ifdef __GNUC__ #define alloca(size) __builtin_alloca (size) + #endif .fi with messy consequences if one has a private version of this function. -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html