On Wed, 29 Jan 2014, Michael Van Canneyt wrote:
On Wed, 29 Jan 2014, hinst wrote:
I want to use an environment variable in FPC configuration file; is this
not possible?
I created sample project which demonstrates the problem. I have one main
source file and one unit which is located
in subdirectory.
I try to compile my program with this bash script:
It looks like FPC does not substitute $mvar with meow. It does not compile
my program.
However if I change options variable to this:
options="@cfg.txt -Mobjfpc pro.pas -Fu$mvar"
Then my program gets compiled successfully.
Obviously, since the bash interpreter takes care of substitution, FPC never
sees $mvar.
It means that:
If I put -Fu$mvar in config file then it does not work
If I put -Fu$mvar in bash script then it does work
Which is strange because in standard config file fpc.cfg I can find not
only built-in variables like $FPCVERSION but
also environment variables like $LOCAL_APPDATA
Examples:
-FuD:\Lazarus\fpc\$FPCVERSION/units/$fpctarget/httpd22
-Fu$LOCAL_APPDATA\FreePascal\fppkg/units/$FPCTARGET/*
This I do not understand. How come that FPC when reading config file
understands $LOCAL_APPDATA, but does not
substitute variable I specified $mvar
Because there are several standard "placeholders" that FPC understands in the
config file. These placeholders start with $.
They are not environment variables, despite the notation with $.
See globals.pas
ReplaceSpecialFolder('$LOCAL_APPDATA',CSIDL_LOCAL_APPDATA);
ReplaceSpecialFolder('$APPDATA',CSIDL_APPDATA);
ReplaceSpecialFolder('$COMMON_APPDATA',CSIDL_COMMON_APPDATA);
ReplaceSpecialFolder('$PERSONAL',CSIDL_PERSONAL);
ReplaceSpecialFolder('$PROGRAM_FILES',CSIDL_PROGRAM_FILES);
ReplaceSpecialFolder('$PROGRAM_FILES_COMMON',CSIDL_PROGRAM_FILES_COMMON);
ReplaceSpecialFolder('$PROFILE',CSIDL_PROFILE);
Is the standard list on Windows.
And looking a bit further, I just see that you CAN do environment variables,
if you enclose them in $$, so $mvar$ would do the trick.
Michael._______________________________________________
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