https://llvm.org/bugs/show_bug.cgi?id=23562
Bug ID: 23562
Summary: clang does not build binutils/gdb when
-D_FORTIFY_SOURCE=2 and -O2 are set.
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Below is a reduced case when building binutils/gdb with clang. This code
compiles well if -D_FORTIFY_SOURCE=2 and -O2 are not set. It pops out the
following error if -D_FORTIFY_SOURCE=2 and -O2 are set. gcc does not have this
problem.
cat f.c
<<<<<<<<
#define _GNU_SOURCE
#define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
ATTRIBUTE_NONNULL(m)
#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
#include <stdio.h>
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
>>>>>>>>>>>>>>>
/usr/bin/clang -D_FORTIFY_SOURCE=2 -c -O2 ./f.c -o a
-B/usr/libexec/gcc/x86_64-cros-linux-gnu -target x86_64-cros-linux-gnu
./f.c:30:12: error: expected parameter declarator
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
^
/usr/include/bits/stdio2.h:199:24: note: expanded from macro 'asprintf'
__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
^
/usr/include/features.h:346:31: note: expanded from macro '__USE_FORTIFY_LEVEL'
# define __USE_FORTIFY_LEVEL 2
^
./f.c:30:12: error: expected ')'
/usr/include/bits/stdio2.h:199:24: note: expanded from macro 'asprintf'
__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
^
/usr/include/features.h:346:31: note: expanded from macro '__USE_FORTIFY_LEVEL'
# define __USE_FORTIFY_LEVEL 2
^
./f.c:30:12: note: to match this '('
/usr/include/bits/stdio2.h:199:18: note: expanded from macro 'asprintf'
__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
^
./f.c:30:50: error: '__nonnull__' attribute parameter 1 is out of bounds
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
^~~~~~~~~~~~~~~~~~
./f.c:26:28: note: expanded from macro 'ATTRIBUTE_PRINTF_2'
#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
^ ~
./f.c:25:80: note: expanded from macro 'ATTRIBUTE_PRINTF'
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
ATTRIBUTE_NONNULL(m)
^
./f.c:23:46: note: expanded from macro 'ATTRIBUTE_NONNULL'
#define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
^
./f.c:30:50: error: '__format__' attribute parameter 2 is out of bounds
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
^~~~~~~~~~~~~~~~~~
./f.c:26:28: note: expanded from macro 'ATTRIBUTE_PRINTF_2'
#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
^ ~
./f.c:25:48: note: expanded from macro 'ATTRIBUTE_PRINTF'
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
ATTRIBUTE_NONNULL(m)
^
./f.c:30:12: error: conflicting types for '__asprintf_chk'
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
^
/usr/include/bits/stdio2.h:199:3: note: expanded from macro 'asprintf'
__asprintf_chk (ptr, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
^
/usr/include/bits/stdio2.h:158:12: note: previous declaration is here
extern int __asprintf_chk (char **__restrict __ptr, int __flag,
^
5 errors generated.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
