[MacPorts] #59931: pstoedit @3.75 does not build on PPC Tiger, Mac OS X 10.4.11, because 'body of constexpr function 'constexpr float rnd(float, float)' not a return-statement'

[MacPorts]

#59931: pstoedit @3.75 does not build on PPC Tiger, Mac OS X 10.4.11, because 'body
of constexpr function 'constexpr float rnd(float, float)' not a return-
statement'
------------------------+--------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.2
Resolution:             |   Keywords:  tiger
      Port:  pstoedit   |
------------------------+--------------------

Comment (by ballapete):

 On High Sierra (and also in documention) I am getting this hint:

 {{{
 libtool: compile:  /usr/bin/clang++ -DHAVE_CONFIG_H -I. -DHAVE_LIBPLOTTER
 -DHAVE_MKSTEMP -DHAVE_MAGIC -DMAGICKCORE_HDRI_ENABLE=0
 -DMAGICKCORE_QUANTUM_DEPTH=16 -DMAGICKCORE_HDRI_ENABLE=0
 -DMAGICKCORE_QUANTUM_DEPTH=16 -DMAGICKCORE_HDRI_ENABLE=0
 -DMAGICKCORE_QUANTUM_DEPTH=16 -I/opt/local/include/ImageMagick-6
 -DHAVE_LIBZIP -DDEFAULTGS=gs
 -DPSTOEDITDATADIR=\"/opt/local/share/pstoedit\"
 -DPSTOEDITLIBDIR=\"/opt/local/lib/pstoedit\" -Wall -Wextra -Wuninitialized
 -Wswitch-default -Wunused -Wshadow -Wwrite-strings -Wcast-qual -Wpointer-
 arith -Wno-long-long -I/opt/local/include -Wno-long-long -D_LITTLE_ENDIAN
 -pipe -Os -std=c++11 -stdlib=libc++ -arch x86_64 -DINTERNALBOOL -MT
 drvpdf.lo -MD -MP -MF .deps/drvpdf.Tpo -c drvpdf.cpp  -fno-common -DPIC -o
 .libs/drvpdf.o
 drvpdf.cpp:46:14: warning: variable declaration in a constexpr function is
 a C++14 extension [-Wc++14-extensions]
         const float roundup = (f < 0.0f) ? -0.5f : 0.5f;
                     ^
 1 warning generated.
 }}}

 And indeed on Leopard using `C++ Standard from 2014` allows `pstoedit` to
 build.

-- 
Ticket URL: <https://trac.macports.org/ticket/59931#comment:2>
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