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authorH.J. Lu <hjl.tools@gmail.com>2016-03-04 08:44:43 -0800
committerH.J. Lu <hjl.tools@gmail.com>2016-03-04 08:44:58 -0800
commit97f7112728fa6f5e2b30af4d085d5f4dedb2b89b (patch)
tree01a96b1e6f32f9ed7a21927db8118a7d0f341ced /sysdeps
parent14a1d7cc4c4fd5ee8e4e66b777221dd32a84efe8 (diff)
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Add a comment in sysdeps/x86_64/Makefile
Mention recursive calls when ENTRY is used in _mcount.S.

	* sysdeps/x86_64/Makefile (sysdep_noprof): Add a comment.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/x86_64/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 9fcadd8a57..788e4fc591 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -7,6 +7,9 @@ endif
 
 ifeq ($(subdir),gmon)
 sysdep_routines += _mcount
+# We cannot compile _mcount.S with -pg because that would create
+# recursive calls when ENTRY is used.  Just copy the normal static
+# object.
 sysdep_noprof += _mcount
 endif