set INCLUDE=%BASE%c\include;%INCLUDE%
set LIB=%BASE%c\lib;%LIB%
[download]

That's interesting. I've noticed that Strawberry sets those two environment variables, but I've never understood why. Afaict, with MinGW (including Strawberry's MinGW), the compiler and linker search those locations by default. In fact, I've unset those 2 envvars, and everything still works fine:

C:\_32\C>set LIB
LIB=

C:\_32\C>set INCLUDE
INCLUDE=

C:\_32\C>type try.c
#include <stdio.h>

int main(void) {
    printf("Hello from strawberry\n");
    return 0;
}

C:\_32\C>gcc -o try.exe try.c

C:\_32\C>try
Hello from strawberry

C:\_32\C>
[download]

Similarly, if I'm building a perl extension using Strawberry Perl, the standard headers and libraries get found fine - even though those 2 envvars are unset. Perhaps those 2 envvars could be useful when it comes to finding headers and libraries that are stored in non-default locations. (I haven't tried that. I prefer to keep LIB and INCLUDE unset, and provide the non-standard locations with the -I and -L switches.)

Update: I've since found time to take a closer look - and I can find no evidence that MinGW and Strawberry Perl take any notice at all of the INCLUDE and LIB environment variables. Visual Studio certainly does ... but not MinGW.

Cheers,
Rob

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