[MacPorts] #63645: building libqalculate @3.21.0 makes clang-10 @10.0.1_5 hit an assertion failure

[MacPorts]

#63645: building libqalculate @3.21.0 makes clang-10 @10.0.1_5 hit an assertion
failure
----------------------------------------------+--------------------
  Reporter:  cooljeanius                      |      Owner:  (none)
      Type:  defect                           |     Status:  new
  Priority:  Normal                           |  Milestone:
 Component:  ports                            |    Version:  2.7.1
Resolution:                                   |   Keywords:
      Port:  libqalculate, clang-10, llvm-10  |
----------------------------------------------+--------------------

Comment (by barracuda156):

 This is what Makefile gets:
 {{{
 CC = /opt/local/bin/gcc-mp-13
 CCDEPMODE = depmode=gcc3
 CC_FOR_BUILD = gcc -std=gnu99
 CFLAGS = -pipe -Os -arch ppc -Wall
 CFLAGS_FOR_BUILD = -g -O2
 CPP = /opt/local/bin/gcc-mp-13 -E
 CPPFLAGS = -isystem/opt/local/include/LegacySupport -I/opt/local/include
 CPPFLAGS_FOR_BUILD =
 CPP_FOR_BUILD = gcc -std=gnu99 -E
 CSCOPE = cscope
 CTAGS = ctags
 CXX = /opt/local/bin/g++-mp-13
 CXXCPP = /opt/local/bin/g++-mp-13 -E
 CXXCPPFLAGS_FOR_BUILD =
 CXXCPP_FOR_BUILD = g++ -E
 CXXDEPMODE = depmode=gcc3
 CXXFLAGS = -pipe -Os -std=c++11 -D_GLIBCXX_USE_CXX11_ABI=0 -arch ppc
 CXXFLAGS_FOR_BUILD = -g -O2
 CXX_FOR_BUILD = g++
 }}}

 Macports does not set `CXXCPP_FOR_BUILD` and `CXX_FOR_BUILD`, so perhaps
 it picks Xcode gcc instead.

-- 
Ticket URL: <https://trac.macports.org/ticket/63645#comment:9>
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