[Gmp-commit] /var/hg/gmp: Remove broken __builtin_alloca configure test

[mercurial at gmplib.org]

details:   /var/hg/gmp/rev/1dc7d5dabc8d
changeset: 18488:1dc7d5dabc8d
user:      Marc Glisse <marc.glisse at inria.fr>
date:      Fri Sep 19 17:18:39 2025 +0200
description:
Remove broken __builtin_alloca configure test

diffstat:

 ChangeLog    |   4 ++++
 acinclude.m4 |  17 -----------------
 2 files changed, 4 insertions(+), 17 deletions(-)

diffs (38 lines):

diff -r b06ade444025 -r 1dc7d5dabc8d ChangeLog
--- a/ChangeLog	Wed Aug 27 08:08:18 2025 +0200
+++ b/ChangeLog	Fri Sep 19 17:18:39 2025 +0200
@@ -1,3 +1,7 @@
+2025-09-19  Marc Glisse <marc.glisse at inria.fr>
+
+	* acinclude.m4 (alloca array): Remove broken test.
+
 2025-03-15  Khem Raj <raj.khem at gmail.com>
 
 	* acinclude.m4: Add parameter names to function prototype.
diff -r b06ade444025 -r 1dc7d5dabc8d acinclude.m4
--- a/acinclude.m4	Wed Aug 27 08:08:18 2025 +0200
+++ b/acinclude.m4	Fri Sep 19 17:18:39 2025 +0200
@@ -564,23 +564,6 @@
 }
 ])
 
-# __builtin_alloca is not available everywhere, check it exists before
-# seeing that it works
-GMP_PROG_CC_WORKS_PART_TEST([$1],[__builtin_alloca availability],
-[int k; int foo () { __builtin_alloca (k); }],
-  [GMP_PROG_CC_WORKS_PART([$1], [alloca array],
-[/* The following provokes an internal compiler error from Itanium HP-UX cc
-    under +O2 or higher.  We use this sort of code in mpn/generic/mul_fft.c. */
-int k;
-int foo ()
-{
-  int i, **a;
-  a = __builtin_alloca (k);
-  for (i = 0; i <= k; i++)
-    a[i] = __builtin_alloca (1 << i);
-}
-])])
-
 GMP_PROG_CC_WORKS_PART([$1], [abs int -> double conversion],
 [/* The following provokes an internal error from the assembler on
    power2-ibm-aix4.3.1.0.  gcc -mrios2 compiles to nabs+fcirz, and this