git: 869cfe9fedd7 - stable/13 - msun: remove fabs from Symbol.map, and adjust comment

The branch stable/13 has been updated by dim:

URL: https://cgit.FreeBSD.org/src/commit/?id=869cfe9fedd77d676dec565ffb2cbe1e5c5e5d5d

commit 869cfe9fedd77d676dec565ffb2cbe1e5c5e5d5d
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-01-27 21:24:38 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-01-30 17:53:47 +0000

    msun: remove fabs from Symbol.map, and adjust comment
    
    We have s_fabs.c, but fabs(3) is already provided by libc due to
    historical reasons, so it is not compiled into libm. When the linker
    does not use --undefined-version, this leads to a complaint about the
    symbol being nonexistent, so remove it from Symbol.map.
    
    While here, adjust the comment about some functions being supplied by
    libc: while it is true that all these are indeed in libc, libm still
    includes its own versions of frexp(3), isnan(3), isnanf(3), and
    isnanl(3).
    
    Reported by:    Steve Kargl <sgk@troutmask.apl.washington.edu>
    MFC after:      3 days
    
    (cherry picked from commit d04e03c19a8d7660ea36f62720eef9bc96b69889)
---
 lib/msun/Makefile   | 3 ++-
 lib/msun/Symbol.map | 1 -
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/msun/Makefile b/lib/msun/Makefile
index 8bc984c2c342..03146bd39463 100644
--- a/lib/msun/Makefile
+++ b/lib/msun/Makefile
@@ -146,7 +146,8 @@ COMMON_SRCS+=	catrig.c catrigf.c \
 	s_cproj.c s_cprojf.c s_creal.c s_crealf.c s_creall.c \
 	s_csinh.c s_csinhf.c s_ctanh.c s_ctanhf.c
 
-# FreeBSD's C library supplies these functions:
+# FreeBSD's C library supplies these functions (but note we still have s_frexp.c
+# and s_isnan.c enabled above, so they are duplicated):
 #COMMON_SRCS+=	s_fabs.c s_frexp.c s_isnan.c s_ldexp.c s_modf.c
 
 # Exclude the generic versions of what we provide in the MD area.
diff --git a/lib/msun/Symbol.map b/lib/msun/Symbol.map
index 6e74918ade6e..4d5a5e4d7e6e 100644
--- a/lib/msun/Symbol.map
+++ b/lib/msun/Symbol.map
@@ -88,7 +88,6 @@ FBSD_1.0 {
 	exp2f;
 	expm1;
 	expm1f;
-	fabs;
 	fabsf;
 	fabsl;
 	fdim;