All sorts of warnings and some errors in:

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/config.log

Here’s the file:

This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by GNU MP configure 6.1.1, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ ./configure --prefix=/opt/local --enable-cxx

## --------- ##
## Platform. ##
## --------- ##

hostname = Blackstone.local
uname -m = x86_64
uname -r = 16.1.0
uname -s = Darwin
uname -v = Darwin Kernel Version 16.1.0: Wed Oct 19 20:31:56 PDT 2016; 
root:xnu-3789.21.4~4/RELEASE_X86_64

/usr/bin/uname -p = i386
/bin/uname -X     = unknown

/bin/arch              = unknown
/usr/bin/arch -k       = unknown
/usr/convex/getsysinfo = unknown
/usr/bin/hostinfo      = Mach kernel version:
         Darwin Kernel Version 16.1.0: Wed Oct 19 20:31:56 PDT 2016; 
root:xnu-3789.21.4~4/RELEASE_X86_64
Kernel configured for up to 8 processors.
4 processors are physically available.
8 processors are logically available.
Processor type: x86_64h (Intel x86-64h Haswell)
Processors active: 0 1 2 3 4 5 6 7
Primary memory available: 32.00 gigabytes
Default processor set: 391 tasks, 1487 threads, 8 processors
Load average: 2.35, Mach factor: 5.64
/bin/machine           = unknown
/usr/bin/oslevel       = unknown
/bin/universe          = unknown

PATH: /opt/local/bin
PATH: /opt/local/sbin
PATH: /bin
PATH: /sbin
PATH: /usr/bin
PATH: /usr/sbin


## ----------- ##
## Core tests. ##
## ----------- ##

configure:3055: checking build system type
configure:3069: result: skylake-apple-darwin16.1.0
configure:3089: checking host system type
configure:3102: result: skylake-apple-darwin16.1.0
configure:3139: checking for a BSD-compatible install
configure:3207: result: /usr/bin/install -c
configure:3218: checking whether build environment is sane
configure:3273: result: yes
configure:3424: checking for a thread-safe mkdir -p
configure:3463: result: ./install-sh -c -d
configure:3470: checking for gawk
configure:3497: result: /usr/bin/awk
configure:3508: checking whether make sets $(MAKE)
configure:3530: result: yes
configure:3559: checking whether make supports nested variables
configure:3576: result: yes
configure:3705: checking whether to enable maintainer-specific portions of 
Makefiles
configure:3714: result: no
User:
ABI=64
CC=/usr/bin/clang
CFLAGS=(unset)
CPPFLAGS=-I/opt/local/include
MPN_PATH=
GMP:
abilist=64 x32 32
cclist=gcc icc cc
configure:5713: /usr/bin/clang -c conftest.c >&5
configure:5716: $? = 0
configure:5719: checking whether /usr/bin/clang is gcc
configure:5721: result: yes
configure:5735: /usr/bin/clang 2>&1 | grep xlc >/dev/null
configure:5738: $? = 1
configure:5792: checking compiler /usr/bin/clang -O2 -pedantic 
-fomit-frame-pointer -m64 -I/opt/local/include
Test compile: 
configure:5806: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:5809: $? = 0
configure:5814: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:5817: $? = 0
Test compile: function pointer return
configure:5860: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:5863: $? = 0
configure:5868: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:5871: $? = 0
Test compile: cmov instruction
configure:5916: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:5919: $? = 0
configure:5924: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:5927: $? = 0
Test compile: double -> ulong conversion
configure:5973: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:5976: $? = 0
configure:5981: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:5984: $? = 0
Test compile: double negation
configure:6028: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6031: $? = 0
configure:6036: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6039: $? = 0
Test compile: double -> float conversion
configure:6084: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6087: $? = 0
configure:6092: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6095: $? = 0
Test compile: gnupro alpha ev6 char spilling
configure:6169: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6172: $? = 0
configure:6177: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6180: $? = 0
Test compile: __builtin_alloca availability
configure:6220: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
conftest.c:1:43: warning: control reaches end of non-void function 
[-Wreturn-type]
int k; int foo () { __builtin_alloca (k); }
                                          ^
1 warning generated.
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:6223: $? = 1
failed program was:
int k; int foo () { __builtin_alloca (k); }
Test compile: abs int -> double conversion
configure:6344: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6347: $? = 0
configure:6352: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6355: $? = 0
Test compile: long long reliability test 1
configure:6409: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
conftest.c:12:83: warning: too many arguments in call to 'g'
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
                                               ~                                
  ^
1 warning generated.
configure:6412: $? = 0
configure:6417: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6420: $? = 0
Test compile: long long reliability test 2
configure:6470: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6473: $? = 0
configure:6478: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6481: $? = 0
Test compile: freebsd hacked gcc
configure:6531: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6534: $? = 0
configure:6539: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6542: $? = 0
Test compile: mpn_lshift_com optimization
configure:6630: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6633: $? = 0
configure:6638: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6641: $? = 0
Test compile: mpn_lshift_com optimization 2
configure:6738: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include conftest.c >&5
configure:6741: $? = 0
configure:6746: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:6749: $? = 0
configure:6895: result: yes
configure:7409: checking compiler /usr/bin/clang -O2 -pedantic 
-fomit-frame-pointer -m64 -I/opt/local/include -mtune=skylake
Test compile: 
configure:7423: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7426: $? = 0
configure:7431: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7434: $? = 0
Test compile: function pointer return
configure:7477: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7480: $? = 0
configure:7485: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7488: $? = 0
Test compile: cmov instruction
configure:7533: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7536: $? = 0
configure:7541: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7544: $? = 0
Test compile: double -> ulong conversion
configure:7590: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7593: $? = 0
configure:7598: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7601: $? = 0
Test compile: double negation
configure:7645: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7648: $? = 0
configure:7653: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7656: $? = 0
Test compile: double -> float conversion
configure:7701: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7704: $? = 0
configure:7709: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7712: $? = 0
Test compile: gnupro alpha ev6 char spilling
configure:7786: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7789: $? = 0
configure:7794: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7797: $? = 0
Test compile: __builtin_alloca availability
configure:7837: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
conftest.c:1:43: warning: control reaches end of non-void function 
[-Wreturn-type]
int k; int foo () { __builtin_alloca (k); }
                                          ^
1 warning generated.
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:7840: $? = 1
failed program was:
int k; int foo () { __builtin_alloca (k); }
Test compile: abs int -> double conversion
configure:7961: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:7964: $? = 0
configure:7969: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7972: $? = 0
Test compile: long long reliability test 1
configure:8026: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
conftest.c:12:83: warning: too many arguments in call to 'g'
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
                                               ~                                
  ^
1 warning generated.
configure:8029: $? = 0
configure:8034: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8037: $? = 0
Test compile: long long reliability test 2
configure:8087: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:8090: $? = 0
configure:8095: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8098: $? = 0
Test compile: freebsd hacked gcc
configure:8148: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:8151: $? = 0
configure:8156: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8159: $? = 0
Test compile: mpn_lshift_com optimization
configure:8247: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:8250: $? = 0
configure:8255: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8258: $? = 0
Test compile: mpn_lshift_com optimization 2
configure:8355: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-I/opt/local/include -mtune=skylake conftest.c >&5
configure:8358: $? = 0
configure:8363: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8366: $? = 0
configure:8512: result: yes
configure:7409: checking compiler /usr/bin/clang -O2 -pedantic 
-fomit-frame-pointer -m64 -mtune=skylake -I/opt/local/include -march=broadwell
Test compile: 
configure:7423: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7426: $? = 0
configure:7431: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7434: $? = 0
Test compile: function pointer return
configure:7477: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7480: $? = 0
configure:7485: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7488: $? = 0
Test compile: cmov instruction
configure:7533: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7536: $? = 0
configure:7541: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7544: $? = 0
Test compile: double -> ulong conversion
configure:7590: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7593: $? = 0
configure:7598: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7601: $? = 0
Test compile: double negation
configure:7645: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7648: $? = 0
configure:7653: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7656: $? = 0
Test compile: double -> float conversion
configure:7701: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7704: $? = 0
configure:7709: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7712: $? = 0
Test compile: gnupro alpha ev6 char spilling
configure:7786: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7789: $? = 0
configure:7794: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7797: $? = 0
Test compile: __builtin_alloca availability
configure:7837: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
conftest.c:1:43: warning: control reaches end of non-void function 
[-Wreturn-type]
int k; int foo () { __builtin_alloca (k); }
                                          ^
1 warning generated.
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:7840: $? = 1
failed program was:
int k; int foo () { __builtin_alloca (k); }
Test compile: abs int -> double conversion
configure:7961: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:7964: $? = 0
configure:7969: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:7972: $? = 0
Test compile: long long reliability test 1
configure:8026: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
conftest.c:12:83: warning: too many arguments in call to 'g'
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
                                               ~                                
  ^
1 warning generated.
configure:8029: $? = 0
configure:8034: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8037: $? = 0
Test compile: long long reliability test 2
configure:8087: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:8090: $? = 0
configure:8095: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8098: $? = 0
Test compile: freebsd hacked gcc
configure:8148: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:8151: $? = 0
configure:8156: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8159: $? = 0
Test compile: mpn_lshift_com optimization
configure:8247: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:8250: $? = 0
configure:8255: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8258: $? = 0
Test compile: mpn_lshift_com optimization 2
configure:8355: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -I/opt/local/include -march=broadwell conftest.c >&5
configure:8358: $? = 0
configure:8363: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:8366: $? = 0
configure:8512: result: yes
configure:8665: checking for gcc
configure:8692: result: /usr/bin/clang
configure:8921: checking for C compiler version
configure:8930: /usr/bin/clang --version >&5
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
configure:8941: $? = 0
configure:8930: /usr/bin/clang -v >&5
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
configure:8941: $? = 0
configure:8930: /usr/bin/clang -V >&5
clang: error: argument to '-V' is missing (expected 1 value)
clang: error: no input files
configure:8941: $? = 1
configure:8930: /usr/bin/clang -qversion >&5
clang: error: unknown argument: '-qversion'
clang: error: no input files
configure:8941: $? = 1
configure:8961: checking whether the C compiler works
configure:8983: /usr/bin/clang -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -march=broadwell -I/opt/local/include -L/opt/local/lib 
-Wl,-headerpad_max_install_names conftest.c  >&5
configure:8987: $? = 0
configure:9035: result: yes
configure:9038: checking for C compiler default output file name
configure:9040: result: a.out
configure:9046: checking for suffix of executables
configure:9053: /usr/bin/clang -o conftest -O2 -pedantic -fomit-frame-pointer 
-m64 -mtune=skylake -march=broadwell -I/opt/local/include -L/opt/local/lib 
-Wl,-headerpad_max_install_names conftest.c  >&5
configure:9057: $? = 0
configure:9079: result: 
configure:9101: checking whether we are cross compiling
configure:9109: /usr/bin/clang -o conftest -O2 -pedantic -fomit-frame-pointer 
-m64 -mtune=skylake -march=broadwell -I/opt/local/include -L/opt/local/lib 
-Wl,-headerpad_max_install_names conftest.c  >&5
configure:9113: $? = 0
configure:9120: ./conftest
configure:9124: $? = 0
configure:9139: result: no
configure:9144: checking for suffix of object files
configure:9166: /usr/bin/clang -c -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -march=broadwell -I/opt/local/include conftest.c >&5
configure:9170: $? = 0
configure:9191: result: o
configure:9195: checking whether we are using the GNU C compiler
configure:9214: /usr/bin/clang -c -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -march=broadwell -I/opt/local/include conftest.c >&5
configure:9214: $? = 0
configure:9223: result: yes
configure:9232: checking whether /usr/bin/clang accepts -g
configure:9252: /usr/bin/clang -c -g -I/opt/local/include conftest.c >&5
configure:9252: $? = 0
configure:9293: result: yes
configure:9310: checking for /usr/bin/clang option to accept ISO C89
configure:9373: /usr/bin/clang  -c -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -march=broadwell -I/opt/local/include conftest.c >&5
configure:9373: $? = 0
configure:9386: result: none needed
configure:9411: checking whether /usr/bin/clang understands -c and -o together
configure:9433: /usr/bin/clang -c conftest.c -o conftest2.o
configure:9436: $? = 0
configure:9433: /usr/bin/clang -c conftest.c -o conftest2.o
configure:9436: $? = 0
configure:9448: result: yes
configure:9469: checking for /usr/bin/clang option to accept ISO C99
configure:9618: /usr/bin/clang  -c -O2 -pedantic -fomit-frame-pointer -m64 
-mtune=skylake -march=broadwell -I/opt/local/include conftest.c >&5
configure:9618: $? = 0
configure:9631: result: none needed
configure:9739: checking for /usr/bin/clang option to accept ISO Standard C
configure:9750: result: none needed
configure:9762: checking how to run the C preprocessor
configure:9793: /usr/bin/clang -E -I/opt/local/include conftest.c
configure:9793: $? = 0
configure:9807: /usr/bin/clang -E -I/opt/local/include conftest.c
conftest.c:15:10: fatal error: 'ac_nonexistent.h' file not found
#include <ac_nonexistent.h>
         ^
1 error generated.
configure:9807: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU MP"
| #define PACKAGE_TARNAME "gmp"
| #define PACKAGE_VERSION "6.1.1"
| #define PACKAGE_STRING "GNU MP 6.1.1"
| #define PACKAGE_BUGREPORT "gmp-b...@gmplib.org, see 
https://gmplib.org/manual/Reporting-Bugs.html";
| #define PACKAGE_URL "http://www.gnu.org/software/gmp/";
| #define PACKAGE "gmp"
| #define VERSION "6.1.1"
| #define WANT_FFT 1
| #define HAVE_HOST_CPU_skylake 1
| #define HAVE_SPEED_CYCLECOUNTER 2
| #define HAVE_CALLING_CONVENTIONS 1
| /* end confdefs.h.  */
| #include <ac_nonexistent.h>
configure:9832: result: /usr/bin/clang -E
configure:9852: /usr/bin/clang -E -I/opt/local/include conftest.c
configure:9852: $? = 0
configure:9866: /usr/bin/clang -E -I/opt/local/include conftest.c
conftest.c:15:10: fatal error: 'ac_nonexistent.h' file not found
#include <ac_nonexistent.h>
         ^
1 error generated.
configure:9866: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU MP"
| #define PACKAGE_TARNAME "gmp"
| #define PACKAGE_VERSION "6.1.1"
| #define PACKAGE_STRING "GNU MP 6.1.1"
| #define PACKAGE_BUGREPORT "gmp-b...@gmplib.org, see 
https://gmplib.org/manual/Reporting-Bugs.html";
| #define PACKAGE_URL "http://www.gnu.org/software/gmp/";
| #define PACKAGE "gmp"
| #define VERSION "6.1.1"
| #define WANT_FFT 1
| #define HAVE_HOST_CPU_skylake 1
| #define HAVE_SPEED_CYCLECOUNTER 2
| #define HAVE_CALLING_CONVENTIONS 1
| /* end confdefs.h.  */
| #include <ac_nonexistent.h>
configure:9964: checking build system compiler /usr/bin/clang
configure:9977: /usr/bin/clang conftest.c
configure:9980: $? = 0
configure:9987: result: yes
configure:10006: checking for build system preprocessor
configure:10017: /usr/bin/clang -E conftest.c
# 1 "conftest.c"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 330 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "conftest.c" 2

configure:10020: $? = 0
configure:10035: result: /usr/bin/clang -E
configure:10042: checking for build system executable suffix
configure:10056: /usr/bin/clang conftest.c -o conftest.exe
configure:10059: $? = 0
./configure: line 10061: ./conftest: No such file or directory
configure:10056: /usr/bin/clang conftest.c -o conftest,ff8
configure:10059: $? = 0
./configure: line 10061: ./conftest: No such file or directory
configure:10056: /usr/bin/clang conftest.c -o conftest
configure:10059: $? = 0
configure:10073: result: 
configure:10079: checking whether build system compiler is ANSI
configure:10092: /usr/bin/clang conftest.c
configure:10095: $? = 0
configure:10104: result: yes
configure:10114: checking for build system compiler math library
configure:10134: /usr/bin/clang conftest.c -lm
configure:10137: $? = 0
configure:10146: result: -lm
configure:10281: checking for C++ compiler version
configure:10290: /usr/bin/clang++ -stdlib=libc++ --version >&5
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
configure:10301: $? = 0
configure:10290: /usr/bin/clang++ -stdlib=libc++ -v >&5
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
clang: warning: argument unused during compilation: '-stdlib=libc++'
configure:10301: $? = 0
configure:10290: /usr/bin/clang++ -stdlib=libc++ -V >&5
clang: error: argument to '-V' is missing (expected 1 value)
clang: error: no input files
configure:10301: $? = 1
configure:10290: /usr/bin/clang++ -stdlib=libc++ -qversion >&5
clang: error: unknown argument: '-qversion'
clang: error: no input files
configure:10301: $? = 1
configure:10305: checking whether we are using the GNU C++ compiler
configure:10324: /usr/bin/clang++ -stdlib=libc++ -c  -I/opt/local/include 
conftest.cpp >&5
configure:10324: $? = 0
configure:10333: result: yes
configure:10342: checking whether /usr/bin/clang++ -stdlib=libc++ accepts -g
configure:10362: /usr/bin/clang++ -stdlib=libc++ -c -g -I/opt/local/include 
conftest.cpp >&5
configure:10362: $? = 0
configure:10403: result: yes
CXXFLAGS chosen by autoconf: -g -O2
configure:10453: checking C++ compiler /usr/bin/clang++ -stdlib=libc++ 
-I/opt/local/include -O2 -pedantic -fomit-frame-pointer -m64 -mtune=skylake 
-march=broadwell
Test compile: 
configure:10467: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -O2 
-pedantic -fomit-frame-pointer -m64 -mtune=skylake -march=broadwell conftest.cc 
>&5
configure:10470: $? = 0
configure:10474: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:10477: $? = 0
Test compile: namespace
configure:10507: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -O2 
-pedantic -fomit-frame-pointer -m64 -mtune=skylake -march=broadwell conftest.cc 
>&5
configure:10510: $? = 0
configure:10514: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:10517: $? = 0
Test compile: std iostream
configure:10553: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -O2 
-pedantic -fomit-frame-pointer -m64 -mtune=skylake -march=broadwell conftest.cc 
>&5
In file included from conftest.cc:3:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iostream:38:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ios:216:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__locale:18:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/mutex:176:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:17:
/usr/include/pthread.h:423:1: error: C++ requires a type specifier for all 
declarations
__SWIFT_UNAVAILABLE_MSG("Use lazily initialized globals instead")
^
/usr/include/pthread.h:423:66: error: expected ';' after top level declarator
__SWIFT_UNAVAILABLE_MSG("Use lazily initialized globals instead")
                                                                 ^
2 errors generated.
configure:10556: $? = 1
failed program was:
/* This test rejects g++ 2.7.2 which doesn't have <iostream>, only a
    pre-standard iostream.h. */
#include <iostream>

/* This test rejects OSF 5.1 Compaq C++ in its default pre-standard iostream
   mode, since that mode puts cout in the global namespace, not "std".  */
void someoutput (void) { std::cout << 123; }

int main (void) { return 0; }
configure:10582: result: no, std iostream
configure:10453: checking C++ compiler /usr/bin/clang++ -stdlib=libc++ 
-I/opt/local/include -g -O2
Test compile: 
configure:10467: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -g -O2 
conftest.cc >&5
configure:10470: $? = 0
configure:10474: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:10477: $? = 0
Test compile: namespace
configure:10507: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -g -O2 
conftest.cc >&5
configure:10510: $? = 0
configure:10514: ./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest
configure:10517: $? = 0
Test compile: std iostream
configure:10553: /usr/bin/clang++ -stdlib=libc++ -I/opt/local/include -g -O2 
conftest.cc >&5
In file included from conftest.cc:3:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/iostream:38:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ios:216:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__locale:18:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/mutex:176:
In file included from 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:17:
/usr/include/pthread.h:423:1: error: C++ requires a type specifier for all 
declarations
__SWIFT_UNAVAILABLE_MSG("Use lazily initialized globals instead")
^
/usr/include/pthread.h:423:66: error: expected ';' after top level declarator
__SWIFT_UNAVAILABLE_MSG("Use lazily initialized globals instead")
                                                                 ^
2 errors generated.
configure:10556: $? = 1
failed program was:
/* This test rejects g++ 2.7.2 which doesn't have <iostream>, only a
    pre-standard iostream.h. */
#include <iostream>

/* This test rejects OSF 5.1 Compaq C++ in its default pre-standard iostream
   mode, since that mode puts cout in the global namespace, not "std".  */
void someoutput (void) { std::cout << 123; }

int main (void) { return 0; }
configure:10582: result: no, std iostream
configure:10598: error: C++ compiler not available, see config.log for details

## ---------------- ##
## Cache variables. ##
## ---------------- ##

ac_cv_build=skylake-apple-darwin16.1.0
ac_cv_c_compiler_gnu=yes
ac_cv_cxx_compiler_gnu=yes
ac_cv_env_ABI_set=set
ac_cv_env_ABI_value=64
ac_cv_env_CCC_set=
ac_cv_env_CCC_value=
ac_cv_env_CC_FOR_BUILD_set=
ac_cv_env_CC_FOR_BUILD_value=
ac_cv_env_CC_set=set
ac_cv_env_CC_value=/usr/bin/clang
ac_cv_env_CFLAGS_set=
ac_cv_env_CFLAGS_value=
ac_cv_env_CPPFLAGS_set=set
ac_cv_env_CPPFLAGS_value=-I/opt/local/include
ac_cv_env_CPP_FOR_BUILD_set=
ac_cv_env_CPP_FOR_BUILD_value=
ac_cv_env_CPP_set=
ac_cv_env_CPP_value=
ac_cv_env_CXXCPP_set=
ac_cv_env_CXXCPP_value=
ac_cv_env_CXXFLAGS_set=
ac_cv_env_CXXFLAGS_value=
ac_cv_env_CXX_set=set
ac_cv_env_CXX_value='/usr/bin/clang++ -stdlib=libc++'
ac_cv_env_LDFLAGS_set=set
ac_cv_env_LDFLAGS_value='-L/opt/local/lib -Wl,-headerpad_max_install_names'
ac_cv_env_LIBS_set=
ac_cv_env_LIBS_value=
ac_cv_env_LT_SYS_LIBRARY_PATH_set=
ac_cv_env_LT_SYS_LIBRARY_PATH_value=
ac_cv_env_M4_set=
ac_cv_env_M4_value=
ac_cv_env_YACC_set=
ac_cv_env_YACC_value=
ac_cv_env_YFLAGS_set=
ac_cv_env_YFLAGS_value=
ac_cv_env_build_alias_set=
ac_cv_env_build_alias_value=
ac_cv_env_host_alias_set=
ac_cv_env_host_alias_value=
ac_cv_env_target_alias_set=
ac_cv_env_target_alias_value=
ac_cv_host=skylake-apple-darwin16.1.0
ac_cv_objext=o
ac_cv_prog_AWK=/usr/bin/awk
ac_cv_prog_CPP='/usr/bin/clang -E'
ac_cv_prog_ac_ct_CC=/usr/bin/clang
ac_cv_prog_cc_c89=
ac_cv_prog_cc_c99=
ac_cv_prog_cc_g=yes
ac_cv_prog_cc_stdc=
ac_cv_prog_cxx_g=yes
ac_cv_prog_make_make_set=yes
am_cv_make_support_nested_variables=yes
am_cv_prog_cc_c_o=yes
gmp_cv_c_for_build_ansi=yes
gmp_cv_check_libm_for_build=-lm
gmp_cv_prog_cpp_for_build='/usr/bin/clang -E'
gmp_cv_prog_exeext_for_build=

## ----------------- ##
## Output variables. ##
## ----------------- ##

ABI='64'
ACLOCAL='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/missing
 aclocal-1.15'
AMTAR='$${TAR-tar}'
AM_BACKSLASH='\'
AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
AM_DEFAULT_VERBOSITY='1'
AM_V='$(V)'
AR=''
AS=''
ASMFLAGS=''
AUTOCONF='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/missing
 autoconf'
AUTOHEADER='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/missing
 autoheader'
AUTOMAKE='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/missing
 automake-1.15'
AWK='/usr/bin/awk'
CALLING_CONVENTIONS_OBJS='amd64call.lo amd64check$U.lo'
CC='/usr/bin/clang'
CCAS='/usr/bin/clang -c'
CC_FOR_BUILD='/usr/bin/clang'
CFLAGS='-O2 -pedantic -fomit-frame-pointer -m64 -mtune=skylake -march=broadwell'
CPP='/usr/bin/clang -E'
CPPFLAGS='-I/opt/local/include'
CPP_FOR_BUILD='/usr/bin/clang -E'
CXX='/usr/bin/clang++ -stdlib=libc++'
CXXCPP=''
CXXFLAGS='-g -O2'
CYGPATH_W='echo'
DEFN_LONG_LONG_LIMB='/* #undef _LONG_LONG_LIMB */'
DEFS=''
DLLTOOL=''
DSYMUTIL=''
DUMPBIN=''
ECHO_C='\c'
ECHO_N=''
ECHO_T=''
EGREP=''
ENABLE_STATIC_FALSE=''
ENABLE_STATIC_TRUE=''
EXEEXT=''
EXEEXT_FOR_BUILD=''
FGREP=''
GMP_LDFLAGS=''
GMP_LIMB_BITS=''
GMP_NAIL_BITS='0'
GREP=''
HAVE_CLOCK_01=''
HAVE_CPUTIME_01=''
HAVE_GETRUSAGE_01=''
HAVE_GETTIMEOFDAY_01=''
HAVE_HOST_CPU_FAMILY_power='0'
HAVE_HOST_CPU_FAMILY_powerpc='0'
HAVE_SIGACTION_01=''
HAVE_SIGALTSTACK_01=''
HAVE_SIGSTACK_01=''
HAVE_STACK_T_01=''
HAVE_SYS_RESOURCE_H_01=''
INSTALL_DATA='${INSTALL} -m 644'
INSTALL_PROGRAM='${INSTALL}'
INSTALL_SCRIPT='${INSTALL}'
INSTALL_STRIP_PROGRAM='$(install_sh) -c -s'
LD=''
LDFLAGS='-L/opt/local/lib -Wl,-headerpad_max_install_names'
LEX=''
LEXLIB=''
LEX_OUTPUT_ROOT=''
LIBCURSES=''
LIBGMPXX_LDFLAGS=''
LIBGMP_DLL=''
LIBGMP_LDFLAGS=''
LIBM=''
LIBM_FOR_BUILD='-lm'
LIBOBJS=''
LIBREADLINE=''
LIBS=''
LIBTOOL=''
LIPO=''
LN_S=''
LTLIBOBJS=''
LT_SYS_LIBRARY_PATH=''
M4=''
MAINT='#'
MAINTAINER_MODE_FALSE=''
MAINTAINER_MODE_TRUE='#'
MAKEINFO='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/missing
 makeinfo'
MANIFEST_TOOL=''
MKDIR_P='./install-sh -c -d'
NM='/usr/bin/nm'
NMEDIT=''
OBJDUMP=''
OBJEXT='o'
OTOOL64=''
OTOOL=''
PACKAGE='gmp'
PACKAGE_BUGREPORT='gmp-b...@gmplib.org, see 
https://gmplib.org/manual/Reporting-Bugs.html'
PACKAGE_NAME='GNU MP'
PACKAGE_STRING='GNU MP 6.1.1'
PACKAGE_TARNAME='gmp'
PACKAGE_URL='http://www.gnu.org/software/gmp/'
PACKAGE_VERSION='6.1.1'
PATH_SEPARATOR=':'
RANLIB=''
SED=''
SET_MAKE=''
SHELL='/bin/sh'
SPEED_CYCLECOUNTER_OBJ='x86_64.lo'
STRIP=''
TAL_OBJECT=''
TUNE_LIBS=''
TUNE_SQR_OBJ=''
U_FOR_BUILD=''
VERSION='6.1.1'
WANT_CXX_FALSE=''
WANT_CXX_TRUE=''
WITH_READLINE_01=''
YACC=''
YFLAGS=''
ac_ct_AR=''
ac_ct_CC='/usr/bin/clang'
ac_ct_CXX=''
ac_ct_DUMPBIN=''
am__EXEEXT_FALSE=''
am__EXEEXT_TRUE=''
am__isrc=''
am__leading_dot='.'
am__tar='$${TAR-tar} chof - "$$tardir"'
am__untar='$${TAR-tar} xf -'
bindir='${exec_prefix}/bin'
build='skylake-apple-darwin16.1.0'
build_alias=''
build_cpu='skylake'
build_os='darwin16.1.0'
build_vendor='apple'
datadir='${datarootdir}'
datarootdir='${prefix}/share'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
dvidir='${docdir}'
exec_prefix='NONE'
gmp_srclinks=''
host='skylake-apple-darwin16.1.0'
host_alias=''
host_cpu='skylake'
host_os='darwin16.1.0'
host_vendor='apple'
htmldir='${docdir}'
includedir='${prefix}/include'
infodir='${datarootdir}/info'
install_sh='${SHELL} 
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.1-x86_64/install-sh'
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='${prefix}/var'
mandir='${datarootdir}/man'
mkdir_p='$(MKDIR_P)'
mpn_objects=''
mpn_objs_in_libgmp=''
oldincludedir='/usr/include'
pdfdir='${docdir}'
prefix='/opt/local'
program_transform_name='s,x,x,'
psdir='${docdir}'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sysconfdir='${prefix}/etc'
target_alias=''

## ----------- ##
## confdefs.h. ##
## ----------- ##

/* confdefs.h */
#define PACKAGE_NAME "GNU MP"
#define PACKAGE_TARNAME "gmp"
#define PACKAGE_VERSION "6.1.1"
#define PACKAGE_STRING "GNU MP 6.1.1"
#define PACKAGE_BUGREPORT "gmp-b...@gmplib.org, see 
https://gmplib.org/manual/Reporting-Bugs.html";
#define PACKAGE_URL "http://www.gnu.org/software/gmp/";
#define PACKAGE "gmp"
#define VERSION "6.1.1"
#define WANT_FFT 1
#define HAVE_HOST_CPU_skylake 1
#define HAVE_SPEED_CYCLECOUNTER 2
#define HAVE_CALLING_CONVENTIONS 1

configure: exit 1


> On Nov 2, 2016, at 9:24 PM, Brandon Allbery <allber...@gmail.com> wrote:
> 
> On Wed, Nov 2, 2016 at 9:20 PM, Murray Eisenberg <murrayeisenb...@gmail.com 
> <mailto:murrayeisenb...@gmail.com>> wrote:
> I did install both Xcode 8.1 and the corresponding Xcode 8.1 tools for 
> Sierra.  (not sure how to verify the version of command-line tools there.)
> 
> Then I would want to look at config.log to determine why it doesn't think you 
> have a compiler.
> 
> -- 
> brandon s allbery kf8nh                               sine nomine associates
> allber...@gmail.com <mailto:allber...@gmail.com>                              
>     ballb...@sinenomine.net <mailto:ballb...@sinenomine.net>
> unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net 
> <http://sinenomine.net/>
---
Murray Eisenberg                        murrayeisenb...@gmail.com
503 King Farm Blvd #101 Home (240)-246-7240
Rockville, MD 20850-6667        Mobile (413)-427-5334


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