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Do not define tgmath.h fmaxmag, fminmag macros for C2X (bug 28397) [committed]

Message ID alpine.DEB.2.22.394.2109291739010.2573743@digraph.polyomino.org.uk
State New
Headers show
Series Do not define tgmath.h fmaxmag, fminmag macros for C2X (bug 28397) [committed] | expand

Commit Message

Joseph Myers Sept. 29, 2021, 5:39 p.m. UTC 
C2X does not include fmaxmag and fminmag.  When I updated feature test
macro handling accordingly (commit
858045ad1c5ac1682288bbcb3676632b97a21ddf, "Update floating-point
feature test macro handling for C2X", included in 2.34), I missed
updating tgmath.h so it doesn't define the corresponding type-generic
macros unless __STDC_WANT_IEC_60559_BFP_EXT__ is defined; I've now
reported this as bug 28397.  Adjust the conditionals in tgmath.h
accordingly.

Tested for x86_64.

---

Committed.
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Patch

diff --git a/math/tgmath.h b/math/tgmath.h
index 9868353c46..3d7b0998df 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -921,7 +921,9 @@ 
 
 /* Like ilogb, but returning long int.  */
 # define llogb(Val) __TGMATH_UNARY_REAL_RET_ONLY (Val, llogb)
+#endif
 
+#if __GLIBC_USE (IEC_60559_BFP_EXT)
 /* Return value with maximum magnitude.  */
 # define fmaxmag(Val1, Val2) __TGMATH_BINARY_REAL_ONLY (Val1, Val2, fmaxmag)