On 2025-01-22 22:15, Mike Stump wrote:
On Jan 19, 2025, at 12:47 PM, Torbjorn SVENSSON <torbjorn.svens...@foss.st.com> 
wrote:

On 2025-01-19 21:20, Andrew Pinski wrote:
On Sun, Jan 19, 2025 at 12:17 PM Torbjörn SVENSSON
<torbjorn.svens...@foss.st.com> wrote:

Ok for trunk?

--

Most baremetal toolchains will not have an implementation for alarm and
sigaction as they are target specific.
For arm-none-eabi with newlib, function signatures are exposed, but
there is no implmentation and thus the test cases causes a undefined
symbol link error.

gcc/testsuite/ChangeLog:

         * gcc.dg/pr78185.c: Remove dg-do and replace with
         with dg-require-effective-target of signal and alarm.
         * gcc.dg/pr116906-1.c: Likewise.
         * gcc.dg/pr116906-1.c: Likewise.
         * gcc.dg/vect/pr101145inf.c: Use effective-target alarm.
         * gcc.dg/vect/pr101145inf_1.c: Likewise.
         * lib/target-supports.exp(check_effective_target_alarm): New.

gcc/ChangeLog:

         * doc/sourcebuild.texi (Effective-Target Keywords): Document
         'alarm'.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svens...@foss.st.com>
---
  gcc/doc/sourcebuild.texi                  |  3 +++
  gcc/testsuite/gcc.dg/pr116906-1.c         |  3 ++-
  gcc/testsuite/gcc.dg/pr116906-2.c         |  3 ++-
  gcc/testsuite/gcc.dg/pr78185.c            |  3 ++-
  gcc/testsuite/gcc.dg/vect/pr101145inf.c   |  1 +
  gcc/testsuite/gcc.dg/vect/pr101145inf_1.c |  1 +
  gcc/testsuite/lib/target-supports.exp     | 23 +++++++++++++++++++++++
  7 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index b5c1b23e527..98ede70f23c 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -2808,6 +2808,9 @@ both scalar and vector modes.
  @subsubsection Environment attributes

  @table @code
+@item alarm
+Target supports @code{alarm}.
+
  @item c
  The language for the compiler under test is C.

diff --git a/gcc/testsuite/gcc.dg/pr116906-1.c 
b/gcc/testsuite/gcc.dg/pr116906-1.c
index 27b1fdae02b..7187507a60d 100644
--- a/gcc/testsuite/gcc.dg/pr116906-1.c
+++ b/gcc/testsuite/gcc.dg/pr116906-1.c
@@ -1,4 +1,5 @@
-/* { dg-do run { target *-*-linux* *-*-gnu* *-*-uclinux* } } */
+/* { dg-require-effective-target alarm } */
+/* { dg-require-effective-target signal } */
  /* { dg-options "-O2" } */

  #include <stdint.h>
diff --git a/gcc/testsuite/gcc.dg/pr116906-2.c 
b/gcc/testsuite/gcc.dg/pr116906-2.c
index 3478771678c..41a352bf837 100644
--- a/gcc/testsuite/gcc.dg/pr116906-2.c
+++ b/gcc/testsuite/gcc.dg/pr116906-2.c
@@ -1,4 +1,5 @@
-/* { dg-do run { target *-*-linux* *-*-gnu* *-*-uclinux* } } */
+/* { dg-require-effective-target alarm } */
+/* { dg-require-effective-target signal } */
  /* { dg-options "-O2 -fno-tree-ch" } */

  #include <unistd.h>
diff --git a/gcc/testsuite/gcc.dg/pr78185.c b/gcc/testsuite/gcc.dg/pr78185.c
index d7781b2080f..ada8b1b9f90 100644
--- a/gcc/testsuite/gcc.dg/pr78185.c
+++ b/gcc/testsuite/gcc.dg/pr78185.c
@@ -1,4 +1,5 @@
-/* { dg-do run { target *-*-linux* *-*-gnu* *-*-uclinux* } } */
+/* { dg-require-effective-target alarm } */
+/* { dg-require-effective-target signal } */
  /* { dg-options "-O" } */

  #include <unistd.h>
diff --git a/gcc/testsuite/gcc.dg/vect/pr101145inf.c 
b/gcc/testsuite/gcc.dg/vect/pr101145inf.c
index aa598875aa5..70aea94b6e0 100644
--- a/gcc/testsuite/gcc.dg/vect/pr101145inf.c
+++ b/gcc/testsuite/gcc.dg/vect/pr101145inf.c
@@ -1,3 +1,4 @@
+/* { dg-require-effective-target alarm } */
  /* { dg-require-effective-target signal } */
  /* { dg-additional-options "-O3" } */
  #include <limits.h>
diff --git a/gcc/testsuite/gcc.dg/vect/pr101145inf_1.c 
b/gcc/testsuite/gcc.dg/vect/pr101145inf_1.c
index 0465788c3cc..fe008284e1d 100644
--- a/gcc/testsuite/gcc.dg/vect/pr101145inf_1.c
+++ b/gcc/testsuite/gcc.dg/vect/pr101145inf_1.c
@@ -1,3 +1,4 @@
+/* { dg-require-effective-target alarm } */
  /* { dg-require-effective-target signal } */
  /* { dg-additional-options "-O3" } */
  #include <limits.h>
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index 939ef3a4119..93795a7e27f 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -14255,3 +14255,26 @@ proc add_options_for_nvptx_alloca_ptx { flags } {

      return $flags
  }
+
+# Return true if alarm is supported on the target.
+
+proc check_effective_target_alarm { } {
Maybe A small optimization is return false here if signal is not supported.
That is:
   if ![check_effective_target_signal] {
     return 0
   }

Sure, I'll add that.

Is it okay with this change?
Or should I send a v2 with this?

Ok.


Pushed as r15-7152-g57b706d141b.

Kind regards,
Torbjörn

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