Fix gnat.dg/lto20.adb XPASS

[Rainer Orth]

This patch

2018-01-30  Jan Hubicka  <hubicka@ucw.cz>

       gcc:
       PR lto/83954
       * lto-symtab.c (warn_type_compatibility_p): Silence false positive
       for type match warning on arrays of pointers.

       gcc/testsuite:
       PR lto/83954
       * gcc.dg/lto/pr83954.h: New testcase.
       * gcc.dg/lto/pr83954_0.c: New testcase.
       * gcc.dg/lto/pr83954_1.c: New testcase.

(which I didn't see posted on gcc-patches yet) seems to have caused

+XPASS: gnat.dg/lto20.adb (test for excess errors)

(seen on i386-pc-solaris2.11 and sparc-sun-solaris2.11).  The original
warning was

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/lto20_pkg.ads:7:13: warning: type of 'lto20_pkg__proc' does not match original declaration [-Wlto-type-mismatch]

so just removing the dg-excess-errors seems the right thing to do.
Tested with the appropriate runtest invocation on
sparc-sun-solaris2.11.  Ok for mainline?

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2018-01-30  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR lto/83954
	* gnat.dg/lto20.adb: Remove dg-excess-errors.

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