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From:	"Wiktor S. (wswiktorSP AT Mpoczta DOT fm)" <djgpp AT delorie DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGGP/GCC - detect unset env variables before using them
Date:	Tue, 26 May 2015 17:40:38 +0200
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> The current GCC.EXE compiler crashes horribly when the environment
> variable "DJGPP" is not set. This variable is supposed to point to the
> djgpp.env file, and I understand it's necessary. However, it would be
> *really* nice if gcc could simply output an error message saying that
> this variable needs to be set, and what it needs to point to, instead
> of crashing with a page fault.


It works for me

    gcc.exe: fatal error: environment variable DJGPP not defined
    compilation terminated.


but I suggest you to create a .bat file that is always in PATH, which sets 
PATH and other environment variables needed by all your compilers and other 
tools:


    C:\DJ\bin>s dj
    OK

    C:\DJ\bin>gcc -v
    Using built-in specs.
    COLLECT_GCC=c:/dj/bin/gcc.exe
    COLLECT_LTO_WRAPPER=c:/dj/bin/../libexec/gcc/djgpp/5.10/lto-wrapper.exe
    Target: djgpp
    Configured with: /gcc-5.10/configure 
djgpp --prefix=/dev/env/DJDIR --disable-werror --enable-languages=c,c++,fortran,objc,obj-c++ 
 --enable-libquadmath-support --enable-lto
    Thread model: single
    gcc version 5.1.0 (GCC)


That "s dj" command effectively sets DJGPP and modifies PATH for me.

There are others like s perl, s python, s msvc, etc.



-- 
Wiktor S.

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