* [PATCH] arm: warn about deprecation of iwmmx in mmintrin.h
@ 2024-02-27 10:14 Richard Earnshaw
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From: Richard Earnshaw @ 2024-02-27 10:14 UTC (permalink / raw)
To: gcc-patches; +Cc: Richard Earnshaw, nickc
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GCC 13's changes file documents that iwmmx is deprecated. Raise the bar
by warning when the mmintrin.h header is included by users, but provide
a way to suppress the warning.
gcc:
* config/arm/mmintrin.h: Warn if this header is included without
defining __ENABLE_DEPRECATED_IWMMXT.
---
gcc/config/arm/mmintrin.h | 3 +++
1 file changed, 3 insertions(+)
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[-- Attachment #2: 0001-arm-warn-about-deprecation-of-iwmmx-in-mmintrin.h.patch --]
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diff --git a/gcc/config/arm/mmintrin.h b/gcc/config/arm/mmintrin.h
index 07659502bf2..e9cc3ddd7ab 100644
--- a/gcc/config/arm/mmintrin.h
+++ b/gcc/config/arm/mmintrin.h
@@ -28,6 +28,9 @@
#error mmintrin.h included without enabling WMMX/WMMX2 instructions (e.g. -march=iwmmxt or -march=iwmmxt2)
#endif
+#ifndef __ENABLE_DEPRECATED_IWMMXT
+#warning support for WMMX/WMMX2 is deprecated and will be removed in GCC 15. Define __ENABLE_DEPRECATED_IWMMXT to suppress this warning
+#endif
#if defined __cplusplus
extern "C" {
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2024-02-27 10:14 [PATCH] arm: warn about deprecation of iwmmx in mmintrin.h Richard Earnshaw
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