hppa: Switch hppa-linux to caller copies ABI

The callee copies ABI used for 32-bit hppa causes no end of optimization issues and problems with OpenMP. The hppa target is only in Debian unstable and gentoo. In both cases, packages are rebuilt often. So, Helge and I decided that it was better to break the ABI and accept whatever problems that result from the switch.

Committed to trunk.

Dave

John David Anglin  [email protected]

2018-01-16 John David Anglin <[email protected]>

* config.gcc (hppa*-*-linux*): Change callee copies ABI to caller copies.

Index: config.gcc
===================================================================
@@ -1339,7 +1339,7 @@
 	gas=yes gnu_ld=yes
 	;;
 hppa*-*-linux*)
-	target_cpu_default="MASK_PA_11|MASK_NO_SPACE_REGS"
+	target_cpu_default="MASK_PA_11|MASK_NO_SPACE_REGS|MASK_CALLER_COPIES"
 	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h pa/pa-linux.h \
 		 pa/pa32-regs.h pa/pa32-linux.h"
 	tmake_file="${tmake_file} pa/t-linux"

That deserves a warning in gcc-8/changes.html

Richard.

Done.
https://gcc.gnu.org/gcc-8/changes.html

Dave

John David Anglin  [email protected]