rebuild formula for linux and use python3 var instead of hard coded name

[ipatch]

• Have you ensured that your commits follow the commit style guide?

brew style freecad/freecad/[NAME_OF_FORMULA_FILE] 

output from running above command should output something similiar to the below

1 file inspected, no offenses detected

• Have you ensured your commit passed audit checks, ie.

brew audit freecad/freecad/[NAME_OF_FORMULA_FILE] --online --new-formula

---

Not all PRs require passing these checks ie. adding [no ci] in the commit message will prevent the CI from running but PRs that change formula files generally should run through the CI checks that way new bottles are built and uploaded to the repository thus not having to build all formula from source but rather installing from a bottle (significantly faster 🐰 ... 🐢)

For more information about this template file learn more

[ipatch]

current build issues on macos,

 /Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries/libGLU.tbd -framework CoreFoundation -framework CoreGraphics /Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries/libGL.tbd
ld: Undefined symbols:
  _CGLChoosePixelFormat, referenced from:
      cglglue_context_create_pbuffer(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_software(cglglue_contextdata*) in gl_cgl.cpp.o
  _CGLCreateContext, referenced from:
      cglglue_context_create_pbuffer(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_software(cglglue_contextdata*) in gl_cgl.cpp.o
  _CGLDestroyContext, referenced from:
      cglglue_contextdata_cleanup(cglglue_contextdata*) in gl_cgl.cpp.o
  _CGLDestroyPixelFormat, referenced from:
      cglglue_contextdata_cleanup(cglglue_contextdata*) in gl_cgl.cpp.o
  _CGLErrorString, referenced from:
      cglglue_context_create_pbuffer(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_pbuffer(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_pbuffer(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_software(cglglue_contextdata*) in gl_cgl.cpp.o
      cglglue_context_create_software(cglglue_contextdata*) in gl_cgl.cpp.o
      _cglglue_context_make_current in gl_cgl.cpp.o
      _cglglue_context_make_current in gl_cgl.cpp.o
      _cglglue_context_make_current in gl_cgl.cpp.o
      ...
  _CGLGetVirtualScreen, referenced from:
      _cglglue_context_make_current in gl_cgl.cpp.o
  _CGLSetOffScreen, referenced from:
      cglglue_context_create_software(cglglue_contextdata*) in gl_cgl.cpp.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libCoin.80.0.2.dylib] Error 1
make[1]: *** [src/CMakeFiles/Coin.dir/all] Error 2
make: *** [all] Error 2

[ipatch]

the above issue has been resolved i believe was related to the default std_cmake_args provided by homebrew in that it was using CLT for macos as opposed to the entire Xcode.app bundled SDK. (not 100% certain) but none the less the build issue seems to be resolved.