[xcrysden] Problem with installing xcrysden on Mac OS 10.17.7 (Catalina)

[Vo, Trinh T (US 398K)]

Dear Developer,

I compiled from source code of xcrysden on my new laptop, and I encountered the following errors:

#   Compiling XCRYSDEN C-code  #
#                              #
#------------------------------#

cd C; /Applications/Xcode.app/Contents/Developer/usr/bin/make "TOPDIR=/Users/trinhvo/xcrysden-1.6.2" compile
make  TOPDIR=/Users/trinhvo/xcrysden-1.6.2
gcc  -ffast-math -funroll-loops -fPIC -pedantic -Wall    -I/usr/include/tcl8.6 -I/usr/local/Cellar/tcl-tk/8.6.11_1/include -I/usr/local/Cellar/tcl-tk/8.6.11_1/include    -c xcAppInit.c
xcAppInit.c:407:3: error: implicit declaration of function 'XGetErrorText' is
      invalid in C99 [-Werror,-Wimplicit-function-declaration]
  XGetErrorText(display,event->error_code,buffer,sizeof(buffer)-1);
  ^
xcAppInit.c:1834:7: warning: 'glDrawBuffer' is deprecated: first deprecated in
      macOS 10.14 - OpenGL API deprecated. (Define GL_SILENCE_DEPRECATION to
      silence these warnings) [-Wdeprecated-declarations]
      glDrawBuffer(GL_BACK);

I do not know how to fix this error.  I have installed all the required libs using homebrew
         - Tcl/Tk
         - mesa and mesa-glu
         - FFTW3
For these libs, I download from web)
         - BWidget
         - Togl (2.0 or later).

I appreciate if you could help me to fix this error.

Thank you very much,

Trinh









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