Re: Saving and restoring parameters

[Boris Kolpackov]

Sensei <noone@nowhere.org> writes:

> all:
>       OLD_CFLAGS=$CFLAGS
>       OLD_CXXFLAGS=$CXXFLAGS
>       OLD_LDFLAGS=$LDFLAGS
>       export CFLAGS=""
>       export CXXFLAGS=""
>       export LDFLAGS=""
>       @echo "CFLAGS:$(CFLAGS)    CXXFLAGS:$(CXXFLAGS)     LDFLAGS:$(LDFLAGS)"
>       @./configure --prefix=$(CUR_DIR)
>       @$(MAKE)
>       @$(MAKE) install
>       CFLAGS=OLD_CFLAGS
>       CXXFLAGS=OLD_CXXFLAGS
>       LDFLAGS=OLD_LDFLAGS
>       @echo "CFLAGS:$(CFLAGS)    CXXFLAGS:$(CXXFLAGS)     LDFLAGS:$(LDFLAGS)"
>

GNU make executes each line in a separate shell. Therefore writing
something like 'export CFLAGS=""' in separate command line of a makefile
does not make much sense; the shell will execute 'export CFLAGS=""' and
exit, there won't be anything after that that will feel the effect.

-boris