[Bug build/32420] New: GCC 6 can't build glibc 2.41

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32420

            Bug ID: 32420
           Summary: GCC 6 can't build glibc 2.41
           Product: glibc
           Version: 2.41
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: carlos at redhat dot com
  Target Milestone: ---

The current glibc

commit 776938e8b8dcf2b59998979e91cc0f9db7d771a8
Author: Joseph Myers <josmyers@redhat.com>
Date:   Wed Dec 4 20:04:04 2024 +0000

    Implement C23 sinpi

doesn't build with GCC 6:

$ /usr/gcc-6.4.1-x32/bin/gcc
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math/s_cospif128.c
-c -std=gnu11 -fgnu89-inline  -O2 -g -Wall -Wwrite-strings -Wundef -Werror
-fmerge-all-constants -frounding-math -fstack-protector-all -fno-common
-U_FORTIFY_SOURCE -Wstrict-prototypes -Wold-style-definition  -fno-math-errno  
 -fPIE          -I../include
-I/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math 
-I/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux 
-I../sysdeps/unix/sysv/linux/x86_64/64 
-I../sysdeps/unix/sysv/linux/x86_64/include -I../sysdeps/unix/sysv/linux/x86_64
 -I../sysdeps/unix/sysv/linux/x86/include -I../sysdeps/unix/sysv/linux/x86 
-I../sysdeps/x86/nptl  -I../sysdeps/unix/sysv/linux/wordsize-64 
-I../sysdeps/x86_64/nptl  -I../sysdeps/unix/sysv/linux/include
-I../sysdeps/unix/sysv/linux  -I../sysdeps/nptl  -I../sysdeps/pthread 
-I../sysdeps/gnu  -I../sysdeps/unix/inet  -I../sysdeps/unix/sysv 
-I../sysdeps/unix/x86_64  -I../sysdeps/unix  -I../sysdeps/posix 
-I../sysdeps/x86_64/64  -I../sysdeps/x86_64/fpu/multiarch 
-I../sysdeps/x86_64/fpu  -I../sysdeps/x86/fpu  -I../sysdeps/x86_64/multiarch 
-I../sysdeps/x86_64  -I../sysdeps/x86/include -I../sysdeps/x86 
-I../sysdeps/ieee754/float128  -I../sysdeps/ieee754/ldbl-96/include
-I../sysdeps/ieee754/ldbl-96  -I../sysdeps/ieee754/dbl-64 
-I../sysdeps/ieee754/flt-32  -I../sysdeps/wordsize-64  -I../sysdeps/ieee754 
-I../sysdeps/generic  -I.. -I../libio -I.  -D_LIBC_REENTRANT -include
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/libc-modules.h
-DMODULE_NAME=libm -include ../include/libc-symbols.h  -DPIC    
-DTOP_NAMESPACE=glibc -I../soft-fp -o
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math/s_cospif128.o
-MD -MP -MF
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math/s_cospif128.o.dt
-MT
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math/s_cospif128.o
In file included from
/export/build/gnu/tools-build/glibc-gitlab-test/build-x86_64-linux/math/s_cospif128.c:1:0:
./s_cospi_template.c: In function ‘__cospif128’:
./s_cospi_template.c:29:27: error: invalid suffix "f128" on floating constant
   x = M_FABS (x - M_MLIT (2.0) * M_SUF (round) (M_LIT (0.5) * x));
                           ^
../sysdeps/generic/math-type-macros-float128.h:31:19: note: in definition of
macro ‘M_MLIT’
 #define M_MLIT(c) c ## f128
                   ^
$

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