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| author | Mike Frysinger <vapier@gentoo.org> | 2013-09-29 03:57:33 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2013-09-29 03:57:33 +0000 |
| commit | d1a5889eb78d960adc5b60ce215ef428aaa9f42d (patch) | |
| tree | 9983c6e05bbe377d1d54657a166cff133d1a5521 /gdb/common | |
| parent | b2c30ccf8938f4e7705413b3408a690f981fb6e0 (diff) | |
| download | gdb-d1a5889eb78d960adc5b60ce215ef428aaa9f42d.tar.gz | |
gdb: btrace: fix build errors on older glibc builds
It is possible to have a build of glibc where SYS_perf_event_open is not
defined (because when the glibc was compiled, the syscall did not exist),
but have newer kernel headers installed so that linux/perf_event.h is
available. In this setup, you get a build failure:
./common/linux-btrace.c: In function 'kernel_supports_btrace':
./common/linux-btrace.c:316:23: error: 'SYS_perf_event_open' undeclared (first use in this function)
Update the ifdef check to also see if the syscall is available.
URL: https://bugs.gentoo.org/473522
Reported-by: William Throwe <wtt6@cornell.edu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'gdb/common')
| -rw-r--r-- | gdb/common/linux-btrace.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gdb/common/linux-btrace.c b/gdb/common/linux-btrace.c index b874c847a96..7e20745a657 100644 --- a/gdb/common/linux-btrace.c +++ b/gdb/common/linux-btrace.c @@ -33,13 +33,16 @@ #include "gdb_wait.h" #include "i386-cpuid.h" -#if HAVE_LINUX_PERF_EVENT_H +#ifdef HAVE_SYS_SYSCALL_H +#include <sys/syscall.h> +#endif + +#if HAVE_LINUX_PERF_EVENT_H && defined(SYS_perf_event_open) #include <errno.h> #include <string.h> #include <stdint.h> #include <unistd.h> -#include <sys/syscall.h> #include <sys/mman.h> #include <sys/user.h> #include <sys/ptrace.h> |