Hello!
The compilation with gentoo glibc 2.20 emits following warning:
../../../gcc-svn/trunk/libcpp/directives.c:2411:28: warning: ignoring
return value of ‘int vasprintf(char**, const char*, __gnuc_va_list)’,
declared with attribute warn_unused_result [-Wunused-result]
The manpage says:
If memory allocation wasn't possible, or some other error occurs,
these functions will return -1, and the contents of strp is undefined.
Attached patch checks the return value and sets ptr to NULL in this case.
2014-12-09 Uros Bizjak <ubiz...@gmail.com>
* directives.c (cpp_define_formatted): Check return value of
vasprintf and in case of error set ptr to NULL.
Bootstrapped on x86_64-linux-gnu.
OK for mainline?
Uros.
Index: directives.c
===================================================================
--- directives.c (revision 218525)
+++ directives.c (working copy)
@@ -2408,7 +2408,8 @@ cpp_define_formatted (cpp_reader *pfile, const cha
va_list ap;
va_start (ap, fmt);
- vasprintf (&ptr, fmt, ap);
+ if (vasprintf (&ptr, fmt, ap) < 0)
+ ptr = NULL;
va_end (ap);
cpp_define (pfile, ptr);
