Test for linking for arm/size-optimization-ieee-[123].c

[Alexandre Oliva <oliva@adacore.com>]

These tests require a target that supports arm soft-float.  The
problem is that the test checks for compile-time soft-float support,
but they may hit a problem when the linker complains that it can't
combine the testcase's object file with hard-float init files and
target system libraries.

I don't see that the tests actually require linking, and they could be
simplified to dg-do assemble, but I figured a link test for soft-float
support could be useful, so I added that, and adjusted the tests to
require it instead.

Tested on an affected platform.  Ok to install?


for  gcc/testsuite/ChangeLog

	* lib/target-supports.exp
	(check_effective_target_arm_soft_ok_link): New.
	* gcc.target/arm/size-optimization-ieee-1.c: Use it.
	* gcc.target/arm/size-optimization-ieee-2.c: Likewise.
	* gcc.target/arm/size-optimization-ieee-3.c: Likewise.
---
 .../gcc.target/arm/size-optimization-ieee-1.c      |    2 +-
 .../gcc.target/arm/size-optimization-ieee-2.c      |    2 +-
 .../gcc.target/arm/size-optimization-ieee-3.c      |    2 +-
 gcc/testsuite/lib/target-supports.exp              |   12 ++++++++++++
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-1.c b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-1.c
index 61475eb4c679f..9af2c6e102071 100644
--- a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-1.c
+++ b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-1.c
@@ -1,4 +1,4 @@
-/* { dg-do link { target arm_soft_ok } } */
+/* { dg-do link { target arm_soft_ok_link } } */
 /* { dg-skip-if "Feature is -mfloat-abi=soft only" { *-*-* } { "-mfloat-abi=*" } { "-mfloat-abi=soft" } } */
 /* { dg-options "-mfloat-abi=soft" } */
 
diff --git a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-2.c b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-2.c
index b4699271ceacc..e78a7ada62eb7 100644
--- a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-2.c
+++ b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-2.c
@@ -1,4 +1,4 @@
-/* { dg-do link { target arm_soft_ok } } */
+/* { dg-do link { target arm_soft_ok_link } } */
 /* { dg-skip-if "Feature is -mfloat-abi=soft only" { *-*-* } { "-mfloat-abi=*" } { "-mfloat-abi=soft" } } */
 /* { dg-options "-mfloat-abi=soft" } */
 
diff --git a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-3.c b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-3.c
index 34b1ebe7afd60..bb9ccefda5e95 100644
--- a/gcc/testsuite/gcc.target/arm/size-optimization-ieee-3.c
+++ b/gcc/testsuite/gcc.target/arm/size-optimization-ieee-3.c
@@ -1,4 +1,4 @@
-/* { dg-do link { target arm_soft_ok } } */
+/* { dg-do link { target arm_soft_ok_link } } */
 /* { dg-skip-if "Feature is -mfloat-abi=soft only" { *-*-* } { "-mfloat-abi=*" } { "-mfloat-abi=soft" } } */
 /* { dg-options "-mfloat-abi=soft" } */
 
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index a1aef0e0a1622..ff8edbd3e1776 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -3935,6 +3935,18 @@ proc check_effective_target_arm_soft_ok { } {
 	} "-mfloat-abi=soft"]
 }
 
+# Return 1 if this is an ARM target supporting -mfloat-abi=soft even
+# for linking.  Some multilibs may be incompatible with this option,
+# and some linkers may reject incompatible options.
+
+proc check_effective_target_arm_soft_ok_link { } {
+    return [check_no_compiler_messages arm_soft_ok_link executable {
+	#include <stdint.h>
+	int dummy;
+	int main (void) { return 0; }
+	} "-mfloat-abi=soft"]
+}
+
 # Return 1 if this is an ARM target supporting -mfpu=vfp with an
 # appropriate abi.
 


-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts.  Ask me about <https://stallmansupport.org>