Determining if the include file crt_externs.h exists failed with the following output:
Change Dir: /var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_8efe2/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_8efe2.dir/build.make CMakeFiles/cmTC_8efe2.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_8efe2.dir/CheckIncludeFile.c.o
/usr/bin/x86_64-pc-linux-gnu-gcc   -O2 -pipe -march=native    -o CMakeFiles/cmTC_8efe2.dir/CheckIncludeFile.c.o   -c /var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: crt_externs.h: No such file or directory
 #include <crt_externs.h>
          ^~~~~~~~~~~~~~~
compilation terminated.
gmake[1]: *** [CMakeFiles/cmTC_8efe2.dir/build.make:66: CMakeFiles/cmTC_8efe2.dir/CheckIncludeFile.c.o] Error 1
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:121: cmTC_8efe2/fast] Error 2


Determining if the function _NSGetArgc exists failed with the following output:
Change Dir: /var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_fc8ef/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_fc8ef.dir/build.make CMakeFiles/cmTC_fc8ef.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_fc8ef.dir/CheckFunctionExists.c.o
/usr/bin/x86_64-pc-linux-gnu-gcc   -O2 -pipe -march=native -DCHECK_FUNCTION_EXISTS=_NSGetArgc   -o CMakeFiles/cmTC_fc8ef.dir/CheckFunctionExists.c.o   -c /usr/share/cmake/Modules/CheckFunctionExists.c
Linking C executable cmTC_fc8ef
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_fc8ef.dir/link.txt --verbose=1
/usr/bin/x86_64-pc-linux-gnu-gcc -O2 -pipe -march=native -DCHECK_FUNCTION_EXISTS=_NSGetArgc  -Wl,-O1 -Wl,--as-needed  -rdynamic CMakeFiles/cmTC_fc8ef.dir/CheckFunctionExists.c.o  -o cmTC_fc8ef 
CMakeFiles/cmTC_fc8ef.dir/CheckFunctionExists.c.o: In function `main':
CheckFunctionExists.c:(.text.startup+0xc): undefined reference to `_NSGetArgc'
collect2: error: ld returned 1 exit status
gmake[1]: *** [CMakeFiles/cmTC_fc8ef.dir/build.make:87: cmTC_fc8ef] Error 1
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:121: cmTC_fc8ef/fast] Error 2


Determining if fortran has isnan function failed with the following output:
Change Dir: /var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_f70bf/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_f70bf.dir/build.make CMakeFiles/cmTC_f70bf.dir/build
gmake[1]: Entering directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
Building Fortran object CMakeFiles/cmTC_f70bf.dir/TestFortranIsnan.f.o
/usr/bin/x86_64-pc-linux-gnu-gfortran   -O2 -pipe    -c /var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0/cmake/modules/TestFortranIsnan.f -o CMakeFiles/cmTC_f70bf.dir/TestFortranIsnan.f.o
/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0/cmake/modules/TestFortranIsnan.f:5:19:

       if (isnan(0.0/0.0)) then
                   1
Error: Division by zero at (1)
/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0/cmake/modules/TestFortranIsnan.f:7:9:

       endif
         1
Error: Expecting END PROGRAM statement at (1)
gmake[1]: *** [CMakeFiles/cmTC_f70bf.dir/build.make:66: CMakeFiles/cmTC_f70bf.dir/TestFortranIsnan.f.o] Error 1
gmake[1]: Leaving directory '/var/tmp/portage/sci-libs/plplot-5.12.0-r1/work/plplot-5.12.0_build/CMakeFiles/CMakeTmp'
gmake: *** [Makefile:121: cmTC_f70bf/fast] Error 2