[libc][arm] Use __ARM_FP to detect floating point support for FEnvImpl.

[lntue]

#72157

[llvmbot]

@llvm/pr-subscribers-libc

Author: None (lntue)

Changes

#72157

---

Full diff: https://github.com/llvm/llvm-project/pull/72177.diff

1 Files Affected:

• (modified) libc/src/__support/FPUtil/FEnvImpl.h (+1-2)

diff --git a/libc/src/__support/FPUtil/FEnvImpl.h b/libc/src/__support/FPUtil/FEnvImpl.h
index 619f6a0a91c4c7e..6810659733de2c3 100644
--- a/libc/src/__support/FPUtil/FEnvImpl.h
+++ b/libc/src/__support/FPUtil/FEnvImpl.h
@@ -29,8 +29,7 @@
 // the apple condition here should be removed.
 #elif defined(LIBC_TARGET_ARCH_IS_X86) && !defined(__APPLE__)
 #include "x86_64/FEnvImpl.h"
-#elif defined(LIBC_TARGET_ARCH_IS_ARM) &&                                      \
-    LIBC_HAS_BUILTIN(__builtin_arm_get_fpscr)
+#elif defined(LIBC_TARGET_ARCH_IS_ARM) && defined(__ARM_FP)
 #include "arm/FEnvImpl.h"
 #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
 #include "riscv/FEnvImpl.h"