https://gcc.gnu.org/g:09ef9756f22a8c4143c6b8d3afcddc72fb700c76
commit r15-5348-g09ef9756f22a8c4143c6b8d3afcddc72fb700c76
Author: Jakub Jelinek <ja...@redhat.com>
Date: Sat Nov 16 17:04:38 2024 +0100
libgcc: Fix a warning/error in libgcc2.c [PR117624]
Since the switch to -std=gnu23 by default, float.h (included from
tsystem.h) defines INFINITY macro (to __builtin_inff ()), which now
results in a warning when compiling libgcc2.c which defines it
to something else (and, worse aarch64 compiles it with -Werror and
build fails).
libgcc2.c asserts INFINITY has the expected type which depends on
the macros with which libgcc2.c is being compiled, so guarding
the define with #ifndef INFINITY wouldn't work.
So this patch instead #undefs the macro before defining it.
2024-11-16 Jakub Jelinek <ja...@redhat.com>
PR libgcc/117624
* libgcc2.c (INFINITY): Add #undef before #define.
Diff:
---
libgcc/libgcc2.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libgcc/libgcc2.c b/libgcc/libgcc2.c
index 3fcb85c5b92e..27959a6e0f25 100644
--- a/libgcc/libgcc2.c
+++ b/libgcc/libgcc2.c
@@ -2673,6 +2673,7 @@ NAME (TYPE x, int m)
#define isfinite(x) __builtin_isfinite (x)
#define isinf(x) __builtin_isinf (x)
+#undef INFINITY
#define INFINITY CONCAT2(__builtin_huge_val, CEXT) ()
#define I 1i
