OS X and "recipe for target 'libidn2.la' failed"

[Jeffrey Walton]

I'm trying to build Git on OS X 10.9. Git has a dependency on libidn2.
libidn2 is failing as shown below.

I suspect its due to AR being set to 'ar'; and not Apple's 'libtool'
(distinct from Autool's libtool). For example, this is from one of my
project's makefiles:

ifneq ($(IS_DARWIN),0)
  AR = libtool
  ARFLAGS = -static -o
  CXX ?= c++
endif

Usually its not enough to just set them, ARFLAGS option '-o' means the
library name must immediately follow an $AR) $(ARFLAGS) sequence.

I checked the mailing list but I did not see message(s) discussing
similar errors.

Does anyone have a suggestion for the easiest path to build on OS X?

Thanks in advance,

Jeff

************************************

$ make
...
Making all in lib
make[2]: Entering directory '/opt/Build-Scripts/libidn2-2.0.0/lib'
make  all-am
make[3]: Entering directory '/opt/Build-Scripts/libidn2-2.0.0/lib'
  CC       idna.lo
  CC       lookup.lo
  CC       decode.lo
  CC       register.lo
  CC       bidi.lo
  CC       version.lo
  CC       error.lo
  CC       punycode.lo
  CC       free.lo
  CC       data.lo
  CC       tr46map.lo
  CC       tables.lo
  CC       context.lo
  CCLD     libidn2.la
warning: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm:
no name list
warning: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm:
no name list
copying selected object files to avoid basename conflicts...
ar: temporary file: No such file or directory
Makefile:1027: recipe for target 'libidn2.la' failed
make[3]: *** [libidn2.la] Error 1
make[3]: Leaving directory '/opt/Build-Scripts/libidn2-2.0.0/lib'
Makefile:955: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/opt/Build-Scripts/libidn2-2.0.0/lib'
Makefile:1065: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/opt/Build-Scripts/libidn2-2.0.0'
Makefile:974: recipe for target 'all' failed
make: *** [all] Error 2
Failed to build IDN