git: ac6b2b4344cd - main - build: glibc on Linux defines explicit_bzero in <string.h>.

The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=ac6b2b4344cd586847fe4318c776e1213b09e6de

commit ac6b2b4344cd586847fe4318c776e1213b09e6de
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-03-27 21:27:16 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-03-27 21:27:16 +0000

    build: glibc on Linux defines explicit_bzero in <string.h>.
    
    Don't install strings.h on such systems.  The local prototype doesn't
    match the native Linux one when built as C++ breaking the build of
    config(8) as a bootstrap tool on some Linux systems.  If the missing
    prototype becomes a problem in the future,
    tools/build/cross-build/include/linux/strings.h can be patched to add
    it.
    
    Reviewed by:    imp, emaste
    Obtained from:  CheriBSD
    Sponsored by:   DARPA
    Differential Revision:  https://reviews.freebsd.org/D39289
---
 tools/build/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/build/Makefile b/tools/build/Makefile
index c7875622b042..71a38534f7ac 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -78,7 +78,7 @@ SYSINCS+=	stat.h
 SRCS+=		futimens.c utimensat.c
 .endif
 
-_WITH_EXPLICIT_BZERO!= grep -c explicit_bzero ${HOST_INCLUDE_ROOT}/strings.h || true
+_WITH_EXPLICIT_BZERO!= cat ${HOST_INCLUDE_ROOT}/strings.h ${HOST_INCLUDE_ROOT}/string.h | grep -c explicit_bzero || true
 .if ${_WITH_EXPLICIT_BZERO} == 0
 # .PATH: ${SRCTOP}/sys/libkern
 # Adding sys/libkern to .PATH breaks building the cross-build compat library