I'm upgrading from source from 11.1-STABLE r321596 to 11-STABLE #346941.
Nothing in make.conf or src.conf.  I believe I am following the
procedure at
https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
but I keep hitting an error:
--snip
c++  -O2 -pipe -I/usr/obj/usr/src/tmp/usr/src/lib/clang/libllvm
-I/usr/src/contrib/llvm/lib/Target/AArch64
-I/usr/src/contrib/llvm/lib/Target/ARM -I/usr/src/contrib/llvm/lib/Target/Mips
-I/usr/src/contrib/llvm/lib/Target/PowerPC
-I/usr/src/contrib/llvm/lib/Target/Sparc -I/usr/src/contrib/llvm/lib/Target/X86
-I/usr/src/lib/clang/include -I/usr/src/contrib/llvm/include
-DLLVM_BUILD_GLOBAL_ISEL -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DNDEBUG
-DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DDEFAULT_SYSROOT=\"/usr/obj/usr/src/tmp\"
-DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_MIPS
-DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_SPARC -DLLVM_TARGET_ENABLE_X86
-DLLVM_NATIVE_ASMPARSER=LLVMInitializeX86AsmParser
-DLLVM_NATIVE_ASMPRINTER=LLVMInitializeX86AsmPrinter
-DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeX86Disassembler
-DLLVM_NATIVE_TARGET=LLVMInitializeX86Target
-DLLVM_NATIVE_TARGETINFO=LLVMInitializeX86TargetInfo
-DLLVM_NATIVE_TARGETMC=LLVMInitializeX86TargetMC -ffunction-sections
-fdata-sections -MD -MF.depend.Analysis_CodeMetrics.o -MTAnalysis/CodeMetrics.o
-Qunused-arguments -I/usr/obj/usr/src/tmp/legacy/usr/include  -std=c++11
-fno-exceptions -fno-rtti -stdlib=libc++ -Wno-c++11-extensions  -c
/usr/src/contrib/llvm/lib/Analysis/CodeMetrics.cpp -o Analysis/CodeMetrics.o
c++  -O2 -pipe -I/usr/obj/usr/src/tmp/usr/src/lib/clang/libllvm
-I/usr/src/contrib/llvm/lib/Target/AArch64
-I/usr/src/contrib/llvm/lib/Target/ARM -I/usr/src/contrib/llvm/lib/Target/Mips
-I/usr/src/contrib/llvm/lib/Target/PowerPC
-I/usr/src/contrib/llvm/lib/Target/Sparc -I/usr/src/contrib/llvm/lib/Target/X86
-I/usr/src/lib/clang/include -I/usr/src/contrib/llvm/include
-DLLVM_BUILD_GLOBAL_ISEL -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DNDEBUG
-DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DDEFAULT_SYSROOT=\"/usr/obj/usr/src/tmp\"
-DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_MIPS
-DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_SPARC -DLLVM_TARGET_ENABLE_X86
-DLLVM_NATIVE_ASMPARSER=LLVMInitializeX86AsmParser
-DLLVM_NATIVE_ASMPRINTER=LLVMInitializeX86AsmPrinter
-DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeX86Disassembler
-DLLVM_NATIVE_TARGET=LLVMInitializeX86Target
-DLLVM_NATIVE_TARGETINFO=LLVMInitializeX86TargetInfo
-DLLVM_NATIVE_TARGETMC=LLVMInitializeX86TargetMC -ffunction-sections
-fdata-sections -MD -MF.depend.Analysis_ConstantFolding.o
-MTAnalysis/ConstantFolding.o -Qunused-arguments
-I/usr/obj/usr/src/tmp/legacy/usr/include  -std=c++11 -fno-exceptions -fno-rtti
-stdlib=libc++ -Wno-c++11-extensions  -c
/usr/src/contrib/llvm/lib/Analysis/ConstantFolding.cpp -o
Analysis/ConstantFolding.o
In file included from /usr/src/contrib/llvm/lib/Analysis/ConstantFolding.cpp:49:
In file included from /usr/include/c++/v1/cfenv:57:
/usr/include/fenv.h:270:3: error: use of undeclared identifier
'__fnclex'
                __fnclex();
                ^
1 error generated.
*** Error code 1
Stop.
make[4]: stopped in /usr/src/lib/clang/libllvm
*** Error code 1
Stop.
make[3]: stopped in /usr/src/lib/clang
*** Error code 1
Stop.
make[2]: stopped in /usr/src
*** Error code 1
Stop.
make[1]: stopped in /usr/src
*** Error code 1
Stop.
make: stopped in /usr/src
--snip
How can I get past this to upgrade to 11.2 and then on to 12.0?  I'm happy
to provide additional info on request.
Thank you!
Jim
My build environment:
# uname -a
FreeBSD diatom2.smate.wwu.edu 11.1-STABLE FreeBSD 11.1-STABLE #0 r321596: Wed
Jul 26 18:21:47 PDT 2017     root at jimsdesk:/usr/obj/usr/src/sys/GENERIC 
amd64
# svn info /usr/src
Path: /usr/src
Working Copy Root Path: /usr/src
URL: svn://svn.freebsd.org/base/stable/11
Relative URL: ^/stable/11
Repository Root: svn://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 346941
Node Kind: directory
Schedule: normal
Last Changed Author: np
Last Changed Rev: 346940
Last Changed Date: 2019-04-29 18:25:02 -0700 (Mon, 29 Apr 2019)
# cat /etc/make.conf /etc/src.conf
cat: /etc/make.conf: No such file or directory
cat: /etc/src.conf: No such file or directory
# find /usr/obj
/usr/obj
# cd /usr/src
# make buildworld > /tmp/mbw-20190429-222910.out 2>&1
# tail -28 /tmp/mbw-20190429-222910.out 
c++  -O2 -pipe -I/usr/obj/usr/src/tmp/usr/src/lib/clang/libllvm
-I/usr/src/contrib/llvm/lib/Target/AArch64
-I/usr/src/contrib/llvm/lib/Target/ARM -I/usr/src/contrib/llvm/lib/Target/Mips
-I/usr/src/contrib/llvm/lib/Target/PowerPC
-I/usr/src/contrib/llvm/lib/Target/Sparc -I/usr/src/contrib/llvm/lib/Target/X86
-I/usr/src/lib/clang/include -I/usr/src/contrib/llvm/include
-DLLVM_BUILD_GLOBAL_ISEL -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DNDEBUG
-DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DDEFAULT_SYSROOT=\"/usr/obj/usr/src/tmp\"
-DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_MIPS
-DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_SPARC -DLLVM_TARGET_ENABLE_X86
-DLLVM_NATIVE_ASMPARSER=LLVMInitializeX86AsmParser
-DLLVM_NATIVE_ASMPRINTER=LLVMInitializeX86AsmPrinter
-DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeX86Disassembler
-DLLVM_NATIVE_TARGET=LLVMInitializeX86Target
-DLLVM_NATIVE_TARGETINFO=LLVMInitializeX86TargetInfo
-DLLVM_NATIVE_TARGETMC=LLVMInitializeX86TargetMC -ffunction-sections
-fdata-sections -MD -MF.depend.Analysis_CodeMetrics.o -MTAnalysis/CodeMetrics.o
-Qunused-arguments -I/usr/obj/usr/src/tmp/legacy/usr/include  -std=c++11
-fno-exceptions -fno-rtti -stdlib=libc++ -Wno-c++11-extensions  -c
/usr/src/contrib/llvm/lib/Analysis/CodeMetrics.cpp -o Analysis/CodeMetrics.o
c++  -O2 -pipe -I/usr/obj/usr/src/tmp/usr/src/lib/clang/libllvm
-I/usr/src/contrib/llvm/lib/Target/AArch64
-I/usr/src/contrib/llvm/lib/Target/ARM -I/usr/src/contrib/llvm/lib/Target/Mips
-I/usr/src/contrib/llvm/lib/Target/PowerPC
-I/usr/src/contrib/llvm/lib/Target/Sparc -I/usr/src/contrib/llvm/lib/Target/X86
-I/usr/src/lib/clang/include -I/usr/src/contrib/llvm/include
-DLLVM_BUILD_GLOBAL_ISEL -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DNDEBUG
-DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd11.2\"
-DDEFAULT_SYSROOT=\"/usr/obj/usr/src/tmp\"
-DLLVM_TARGET_ENABLE_AARCH64 -DLLVM_TARGET_ENABLE_ARM -DLLVM_TARGET_ENABLE_MIPS
-DLLVM_TARGET_ENABLE_POWERPC -DLLVM_TARGET_ENABLE_SPARC -DLLVM_TARGET_ENABLE_X86
-DLLVM_NATIVE_ASMPARSER=LLVMInitializeX86AsmParser
-DLLVM_NATIVE_ASMPRINTER=LLVMInitializeX86AsmPrinter
-DLLVM_NATIVE_DISASSEMBLER=LLVMInitializeX86Disassembler
-DLLVM_NATIVE_TARGET=LLVMInitializeX86Target
-DLLVM_NATIVE_TARGETINFO=LLVMInitializeX86TargetInfo
-DLLVM_NATIVE_TARGETMC=LLVMInitializeX86TargetMC -ffunction-sections
-fdata-sections -MD -MF.depend.Analysis_ConstantFolding.o
-MTAnalysis/ConstantFolding.o -Qunused-arguments
-I/usr/obj/usr/src/tmp/legacy/usr/include  -std=c++11 -fno-exceptions -fno-rtti
-stdlib=libc++ -Wno-c++11-extensions  -c
/usr/src/contrib/llvm/lib/Analysis/ConstantFolding.cpp -o
Analysis/ConstantFolding.o
In file included from /usr/src/contrib/llvm/lib/Analysis/ConstantFolding.cpp:49:
In file included from /usr/include/c++/v1/cfenv:57:
/usr/include/fenv.h:270:3: error: use of undeclared identifier
'__fnclex'
                __fnclex();
                ^
1 error generated.
*** Error code 1
Stop.
make[4]: stopped in /usr/src/lib/clang/libllvm
*** Error code 1
Stop.
make[3]: stopped in /usr/src/lib/clang
*** Error code 1
Stop.
make[2]: stopped in /usr/src
*** Error code 1
Stop.
make[1]: stopped in /usr/src
*** Error code 1
Stop.
make: stopped in /usr/src