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authorH.J. Lu <hjl.tools@gmail.com>2015-10-15 13:35:40 -0700
committerH.J. Lu <hjl.tools@gmail.com>2015-10-15 13:35:40 -0700
commit983a33fa7d50aa8bcff1e0f183388c74b1b5e213 (patch)
tree9dba17a716a178336e0a7e653f052278ccbd59dd /sysdeps
parentb7d09f0d63a5d6705b5e275b8e3c855210b173a0 (diff)
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Add comments for GCC 5 requirement
	* sysdeps/unix/sysv/linux/i386/sysdep.h: Add comments for
	GCC 5 requirement.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/i386/sysdep.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index 5324da6329..76db7b8ab9 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -227,6 +227,10 @@
 extern int __syscall_error (int)
   attribute_hidden __attribute__ ((__regparm__ (1)));
 
+/* Since GCC 5 and above can properly spill %ebx with PIC when needed,
+   we can inline syscalls with 6 arguments if GCC 5 or above is used
+   to compile glibc.  */
+
 #if !__GNUC_PREREQ (5,0)
 /* We need some help from the assembler to generate optimal code.  We
    define some macros here which later will be used.  */