Install unwind.h into /usr/include

Install headers from LLVM's libunwind in place of the headers from
libcxxrt and allow C applications to use the library.

As part of this, remove include/unwind.h and switch libthr over to
using the installed unwind.h.

Reviewed by:	dim, emaste
MFC after:	10 days
Differential Revision: https://reviews.freebsd.org/D34065

Author: bsdjhb

ObsoleteFiles.inc

@@ -52,6 +52,11 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20220210: unwind.h moved to /usr/include
+OLD_FILES+=usr/include/c++/v1/unwind-arm.h
+OLD_FILES+=usr/include/c++/v1/unwind-itanium.h
+OLD_FILES+=usr/include/c++/v1/unwind.h
+
 # 20220128: mips pmc events removed
 OLD_FILES+=usr/share/man/man3/pmc.mips24k.3
 OLD_FILES+=usr/share/man/man3/pmc.octeon.3

include/unwind.h

@@ -239,9 +239,6 @@ STD+=		${HDRDIR}/${hdr}
 STD+=		${.CURDIR}/__config_site
 
 RT_HEADERS+=	cxxabi.h
-RT_HEADERS+=	unwind-arm.h
-RT_HEADERS+=	unwind-itanium.h
-RT_HEADERS+=	unwind.h
 .for hdr in ${RT_HEADERS}
 STD+=		${_LIBCXXRTDIR}/${hdr}
 .endfor

lib/libc++/Makefile

@@ -11,6 +11,10 @@ WARNS?=	2
 SRCS_EXC+=	int_util.c
 .include "Makefile.inc"
 
+INCS+=		${UNWINDINCDIR}/__libunwind_config.h
+INCS+=		${UNWINDINCDIR}/libunwind.h
+INCS+=		${UNWINDINCDIR}/unwind.h
+
 .if ${.MAKE.LEVEL} > 0
 # avoid circular dependencies
 GENDIRDEPS_FILTER+= Nlib/msun

lib/libgcc_eh/Makefile

@@ -34,7 +34,6 @@ CXXFLAGS.${file}+=	-fno-sanitize=address
 .endfor
 
 CFLAGS+=	-I${UNWINDINCDIR}
-CFLAGS+=	-I${.CURDIR}
 CFLAGS+=	-D_LIBUNWIND_IS_NATIVE_ONLY
 CFLAGS+=	-D_LIBUNWIND_USE_FRAME_HEADER_CACHE
 CXXFLAGS+=	-fno-rtti

lib/libgcc_eh/Makefile.inc

@@ -19,7 +19,6 @@ CFLAGS+=-DPTHREAD_KERNEL
 CFLAGS+=-I${SRCTOP}/lib/libc/include
 CFLAGS+=-I${SRCTOP}/lib/libc/${MACHINE_CPUARCH}
 CFLAGS+=-I${.CURDIR}/thread
-CFLAGS+=-I${SRCTOP}/include
 CFLAGS+=-I${.CURDIR}/arch/${MACHINE_CPUARCH}/include
 CFLAGS+=-I${.CURDIR}/sys
 CFLAGS+=-I${SRCTOP}/libexec/rtld-elf

lib/libthr/Makefile

@@ -4027,9 +4027,6 @@ OLD_FILES+=usr/include/c++/v1/typeindex
 OLD_FILES+=usr/include/c++/v1/typeinfo
 OLD_FILES+=usr/include/c++/v1/unordered_map
 OLD_FILES+=usr/include/c++/v1/unordered_set
-OLD_FILES+=usr/include/c++/v1/unwind-arm.h
-OLD_FILES+=usr/include/c++/v1/unwind-itanium.h
-OLD_FILES+=usr/include/c++/v1/unwind.h
 OLD_FILES+=usr/include/c++/v1/utility
 OLD_FILES+=usr/include/c++/v1/valarray
 OLD_FILES+=usr/include/c++/v1/variant