Bug 1660 – DFLAGS environment variables is not working

dmd is not respecting DFLAGS environment variable, this prevents from easy switching beetwen phobos and tango. example: $ export DFLAGS="-I/usr/lib/dmd-tango/src -defaultlib=dtango-base-dmd -debuglib=dtango-base-dmd -version=Tango -version=Posix" $ ls /usr/lib/dmd-tango/src/tango/io/Console.d /usr/lib/dmd-tango/src/tango/io/Console.d ~/tango-0.99.2-src/example/console$ dmd hello.d hello.d(16): module Console cannot read file 'tango/io/Console.d' CC environment variables is working, DFLAGS seems to not.

This is so simple bug, and fix is trivial. Please do something with it.

The dmd.conf file overrides any DFLAGS environment variable setting prior to running dmd. This is by design. You can set a local dmd.conf for each of your projects, however.

Config files are more inconvenient than env variables, thus env variables should have higher priority. I'll leave it to the reporter whether it should be reopened though.

Most tools behaves in this way, gcc, make. IMHO environment variables should have higher priority than /etc/dmd.conf. Practicly always we have configured /etc/dmd.conf so is env. variable have smaller priority and it will be never used. Proposed order: 1. DMD=`which dmd`; `dirname $DMD`/dmd.conf - compiler settings 2. /etc/dmd.conf - system settings 3. $HOME/dmd.conf - user settings 4. `pwd`/dmd.conf - project settings 5. DFLAGS env variable - overrding them 6. command line - from make/rebuild/manual compilation as oposed to current: 1. DFLAGS env variable 2. `pwd`/dmd.conf 3. $HOME/dmd.conf 4. DMD=`which dmd`; `dirname $DMD`/dmd.conf 5. /etc/dmd.conf 6. command line which is very strange to me. I want for example create wrapper dmd-tango: #!/bin/sh export DFLAGS="override /etc/dmd.conf which have conf for dmd-phobos" exec /usr/bin/dmd $* Currently there is no easy way to do this. I don't exactly understand phrase "This is handy to make dmd independent of programs with conflicting use of environment variables." from http://www.digitalmars.com/d/2.0/dmd-linux.html#dmd_conf We are using only DFLAGS and CC, what programs will/can conflict with them?

Other programs set and use environment variables. We have no control over that whatsoever. We have little choice but have dmd.conf override such settings.

The configuration file can reference existing environment variables. Thus, if you want dmd to get command-line options from the environment, append %MY_DFLAGS% at the end of the DFLAGS setting in the configuration file, and specify your flags in the MY_DFLAGS variable.