[Buildroot] [Fwd: Re: I apologize for asking...]

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From: Andrew Wiley <[email protected]>
Subject: Re: [Buildroot] I apologize for asking...
Date: Mon, 23 Feb 2009 19:58:26 -0600
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unset isn't a real command, it's built in to your shell. Somehow this environment variable is getting set, and buildroot wants it cleared. I don't know if buildroot starts its own shell or what, but this is getting set somehow somewhere. Because unsetting the variable only affects the shell you're currently in, it can't screw up your system. If you unset it in one shell, then launch another, the setting will be back in the new shell.

I'm guessing that somewhere in a folder (generally /etc/profile.d), your distribution has a bunch of scripts that are run to set up environment variables. You may need to go through these scripts and comment out CFLAGS, but hopefully someone from the Buildroot devs has a better suggestion. I may be missing something, but I'm pretty sure that when you run unset and it has no effect, it means Buildroot is starting a new shell somewhere, which is somehow getting that variable back.

Andrew Wiley
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I created your problem and fixed it using the method described earlier. A transcript follows...
Are you using bash for your shell?

emalkowski at eric-lnx:/local/emalkowski/buildroot$ export CFLAGS=blah emalkowski at eric-lnx:/local/emalkowski/buildroot$ make

Checking build system dependencies:

BUILDROOT_DL_DIR clean:                         Ok
CC clean:                                       Ok
CXX clean:                                      Ok
CPP clean:                                      Ok
CFLAGS clean:                                   FALSE

You must run 'unset CFLAGS' so buildroot can run with a clean environment on your build machine

make: *** [dependencies] Error 1
emalkowski at eric-lnx:/local/emalkowski/buildroot$ env | grep CFLAGS CFLAGS=blah
emalkowski at eric-lnx:/local/emalkowski/buildroot$ unset CFLAGS emalkowski at eric-lnx:/local/emalkowski/buildroot$ env | grep CFL emalkowski at eric-lnx:/local/emalkowski/buildroot$ make

Checking build system dependencies:

BUILDROOT_DL_DIR clean:                         Ok
CC clean:                                       Ok
CXX clean:                                      Ok
CPP clean:                                      Ok
CFLAGS clean:                                   Ok
INCLUDES clean:                                 Ok
CXXFLAGS clean:                                 Ok
which installed:                                Ok
sed works:                                      Ok (/bin/sed)

GNU make version '3.81': Ok
C compiler '/usr/bin/gcc'
C compiler version '4.1.1': Ok
C++ compiler '/usr/bin/g++'

C++ compiler version '4.1.1':                   Ok
awk installed:                                  Ok
bash installed:                                 Ok
bison installed:                                Ok
flex installed:                                 Ok
gettext installed:                              Ok
makeinfo installed:                             Ok
Build system dependencies:                      Ok

rm -rf /local/emalkowski/buildroot/project_build_i586/vehicle_manager/buildro ot-config
mkdir -p /local/emalkowski/buildroot/project_build_i586/vehicle_manager cp -dpRf package/config/buildroot-config /local/emalkowski/buildroot/project_ build_i586/vehicle_manager/buildroot-config

<< snip >>